BACKCALCULATION OF LAYER MODULI OF GRANULAR LAYERS FOR BOTH RIGID
AND FLEXIBLE PAVEMENTS
By
Ashvini Kumar Thottempudi

A THESIS
Submitted to
Michigan State University
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
Civil Engineering
2010

ABSTRACT
BACKCALCULATION OF LAYER MODULI OF GRANULAR LAYERS FOR BOTH RIGID
AND FLEXIBLE PAVEMENTS
By
Ashvini Kumar Thottempudi
The resilient moduli (MR) of surface, base and subbase pavement layers and that of the
roadbed soil are primary design input parameters to all pavement design software. The modulus
values could be obtained from the laboratory using cyclic load tests or backcalculated from
Falling Weigh Deflectometer (FWD) data (deflection data). In this study FWD data were used to
backcalculate the modulus values of unbound granular materials supporting rigid and flexible
pavements. The backcalculated MR values were then compared to those values obtained by
Michigan Technological University (MTU) in the laboratory. The results show that on average
the backcalculated MR values of the unbound granular layer are about four times higher than the
laboratory determined MR. The pavement type and the aggregate characteristics, such as
aggregate type and gradation, did not have any significant impact on the backcalculated MR
values.

To Mom and Dad

iii

ACKNOWLEDGEMENTS

The author would like to thank his advisor, Dr. Gilbert Baladi, for his guidance and
support throughout his graduate career. Many thanks to the Department of Civil &
Environmental Engineering at Michigan State University for providing me with the opportunity
to pursue my graduate degree in Civil Engineering. The efforts and inputs of the members of the
advisory committee, Dr Neeraj Buch, and Dr Syed Waqar Haider, are highly appreciated.
The author would also like to thank the Michigan Department of Transportation (MDOT)
for sponsoring this study. The author highly appreciates the suggestions and help received from
MDOT employees, Mr Mike Eacker and Mr Ben Krom throughout the course of this study.
Many thanks to my colleagues, Mr. Tyler Dawson and Mr. Joseph Primeau, for their help with
the data analysis.
Finally, the author would like to thank his family and friends for their constant support
and encouragement.

iv

TABLE OF CONTENTS
LIST OF TABLES .................................................................................................................... VII
LIST OF FIGURES ..................................................................................................................... X
CHAPTER 1
INTRODUCTION......................................................................................................................... 1
1.1 BACKGROUND ................................................................................................................... 1
1.2 PROBLEM STATEMENT .................................................................................................... 2
1.3 OBJECTIVES ........................................................................................................................ 4
1.4 RESEARCH PLAN ............................................................................................................... 4
1.5 THESIS LAYOUT ................................................................................................................. 7
CHAPTER 2
LITERATURE REVIEW ............................................................................................................ 8
2.1 REVIEW OF MDOT PRACTICES ....................................................................................... 8
2.2 CHARACTERIZATION OF THE UNBOUND GRANULAR MATERIALS ..................... 9
2.3 ROLE OF THE RESILIENT MODULUS OF UNBOUND GRANULAR LAYER IN THE
M-E PDG: .................................................................................................................................. 11
2.3.1 The M-E PDG Design Level 1 – Laboratory Tests and NDT ....................................... 11
2.3.2 The M-E PDG Design Level 2 – Correlations to Other Material Properties ................ 14
2.3.3 Level 3 – Pavement Design - Typical MR Values Based on Calibrations ................... 16
2.4 RESILIENT MODULUS OF GRANULAR MATERIALS IN MICHIGAN ...................... 18
2.4.1 Gradation ....................................................................................................................... 18
2.4.2 Moisture Condition ....................................................................................................... 18
2.4.3 Laboratory Tests ............................................................................................................ 20
2.4.4 Summary of the Results ................................................................................................ 21
2.4.5 Laboratory Resilient Modulus of Unbound Granular Materials ................................... 23
2.5 NONDESTRUCTIVE DEFLECTION TESTS (NDT) ........................................................ 25
2.5.1 The MDOT KUAB Falling Weight Deflectometer (FWD) .......................................... 25
2.6 BACKCALCULATION OF LAYER MODULI ................................................................. 27
2.6.1 Backcalculation of Flexible Pavement Layer Moduli ................................................... 29
2.6.1.1 The AASHTO Method ............................................................................................ 29
2.6.1.2 MICHBACK ........................................................................................................... 31
2.6.1.3 MODTAG ............................................................................................................... 32
2.6.1.4 MODULUS 6.0 ....................................................................................................... 33
2.6.1.5 EVERCALC ........................................................................................................... 33
2.6.2 Backcalculation of Rigid Pavement Layer Moduli ....................................................... 33
2.6.2.1 AREA Method ........................................................................................................ 34
2.6.2.2 NUS-BACK3 .......................................................................................................... 40
2.6.2.3 ILLI-BACK............................................................................................................. 42
2.6.3 Forwardcalculation ........................................................................................................ 42
2.7 COMPARISON OF LABORATORY AND BACKCALCULATED GRANULAR LAYER
MODULI ................................................................................................................................... 48

v

CHAPTER 3
LABORATORY AND FIELD INVESTIGATION ................................................................. 52
3.1 INTRODUCTION ............................................................................................................... 52
3.2 PARTITIONING THE STATE OF MICHIGAN ................................................................ 52
3.3 LABORATORY TEST ........................................................................................................ 52
3.4 FIELD FWD TESTS ............................................................................................................ 55
CHAPTER 4
DATA ANALYSIS ...................................................................................................................... 66
4.1 INTRODUCTION ............................................................................................................... 66
4.2 DEFLECTION DATA ......................................................................................................... 67
4.3 PAVEMENT STRUCTURES ............................................................................................. 78
4.4 BACKCALCULATION OF UNBOUND GRANULAR LAYER MODULI ..................... 80
4.4.1 Rigid Pavements ............................................................................................................ 81
4.4.2 Flexible Pavements ....................................................................................................... 95
4.5 IMPACT OF PAVEMENT TYPE ON THE BACKCALCULATED MODULI............... 120
4.6 IMPACT OF AGGREGATE CHARACTERISTICS ON THE MODULUS OF THE
UNBOUND GRANULAR LAYER ........................................................................................ 123
4.6.1 Aggregate Type ........................................................................................................... 124
4.6.2 Aggregate Gradation ................................................................................................... 126
4.7 COMPARISON BETWEEN LABORATORY AND BACKCALCULATED GRANULAR
LAYER MODULI ................................................................................................................... 128
4.8 EQUIVALENT GRANULAR LAYER RESILIENT MODULUS ................................... 131
CHAPTER 5
SUMMARY, CONCLUSIONS AND RECOMMENDATIONS .......................................... 136
5.1 SUMMARY ....................................................................................................................... 136
5.2 CONCLUSIONS ............................................................................................................... 137
5.3 RECOMMENDATIONS ................................................................................................... 139
APPENDIX A ............................................................................................................................ 143
APPENDIX B ............................................................................................................................ 268
REFERENCES .......................................................................................................................... 439

vi

LIST OF TABLES
Table 2.1 Comparison between three soil classification systems (USDA 1992) ......................... 10
Table 2.2 Correlation equations included in the M-E PDG for Design level 2 ............................ 15
Table 2.3 Typical MR Values used in M-E PDG ......................................................................... 17
Table 2.4 Granular material type, gradation designation, dry unit weight and moisture contents of
the test samples (Mayrberger et al 2007)............................................................................... 20
Table 2.5 Different stages of the T 307-99 test protocol (Mayrberger et al 2007) ....................... 21
Table 2.6 Effective stress for 15 stages of T 307-99 for a fully saturated condition (Mayrberger et
al 2007) .................................................................................................................................. 22
Table 2.7 Effect of moisture conditions on the stiffness of granular materials (Mayrberger et al
2007) ...................................................................................................................................... 23
Table 2.8 Regression coefficients for δr* (Frabizzio 1998) ........................................................... 36
Table 2.9 Backcalculation programs (Dawson 2008) ................................................................... 50
Table 3.1 Summary of tests conducted by MTU (Mayrberger et al, 2007) .................................. 54
Table 3.2: Number of files and tests conducted on the rigid pavement ........................................ 59
Table 3.3: Number of files and tests conducted on the flexible pavement ................................... 60
Table 4.1 Distribution of FWD files and tests .............................................................................. 68
Table 4.2 A summary of the FWD files for rigid pavement ......................................................... 69
Table 4.3 A summary of the FWD files for flexible pavement .................................................... 74
Table 4.4 A sample backcalculated file for rigid pavement ......................................................... 85
Table 4.5 A summary of the backcalculated granular layer modulus for rigid pavements .......... 86
Table 4.6 Descriptive statistics for backcalculated granular layer and roadbed modulus for rigid
pavements for all data, case 1 ................................................................................................ 91
Table 4.7 Descriptive statistics for backcalculated granular layer and roadbed modulus for rigid
pavement after deleting the upper and lower 10% of the backcalculated moduli, case 2 ..... 92
Table 4.8 Descriptive statistics for backcalculated granular layer and roadbed modulus for rigid
pavement after deleting the upper and lower 20% of the backcalculated moduli, case 3 ..... 94

vii

Table 4.9 Descriptive statistics for backcalculated granular layer and roadbed modulus for rigid
th
pavement for backcalculated moduli less than the 75 percentile value, case 4 .................. 95
Table 4.10 Sample backcalculated file for a flexible pavement ................................................... 99
Table 4.11 A summary of the backcalculated granular layer modulus for flexible pavements (two
– layered system) ................................................................................................................. 101
Table 4.12 A summary of the backcalculated granular layer modulus for flexible pavements
(three – layered system) ....................................................................................................... 104
Table 4.13 Statistical summary of the tests converged in two and three layered analyses ......... 107
Table 4.14 A summary of the average backcalculated moduli using two and three layer analyses
for flexible pavements ......................................................................................................... 108
Table 4.15 Descriptive statistics for backcalculated pavement layer moduli for flexible
pavements using both two and three layered systems, case 1 ............................................. 114
Table 4.16 Descriptive statistics for backcalculated pavement layer moduli for flexible
pavements using both two and three layered systems after deleting the upper and lower 10
percent of the backcalculated moduli, case 2 ...................................................................... 116
Table 4.17 Descriptive statistics for backcalculated pavement layer moduli for flexible
pavements using both two and three layered systems after deleting the upper and lower 20
percent of the backcalculated moduli, case 3 ...................................................................... 118
Table 4.18 Descriptive statistics for backcalculated pavement layer moduli for flexible
th
pavements using both two and three layered systems for all data less than the 75 percentile
value of the backcalculated moduli, case 4 ......................................................................... 120
Table 4.19 A summary of the results of the statistical analysis of backcalculated granular
modulus for rigid and flexible pavements ........................................................................... 122
Table 4.20 Number of tests for each aggregate type and gradation............................................ 124
Table 4.21 Grading requirements for dense and open graded aggregates (MDOT 2003) .......... 127
Table 4.22 Summary of the results of statistical analysis of backcalculated granular moduli for
dense and open graded unbound granular layer moduli ...................................................... 128
Table 4.23 Summary of backcalculated and laboratory determined base layer modulus for
flexible pavement ................................................................................................................ 130
Table 4.24 A summary of backcalculated and laboratory determined granular layer modulus for
flexible pavements ............................................................................................................... 130
Table 4.25 Comparison of the backcalculated granular layer modulus with laboratory determined
viii

base modulus for all analyses cases. .................................................................................... 131
Table A.1 Backcalculated Pavement Layer Moduli for Rigid Pavement (Two – Layer System)
............................................................................................................................................. 144
Table B.1 Backcalculated Pavement Layer Moduli for Flexible Pavement (Two – Layer System)
............................................................................................................................................. 269
Table B.2 Backcalculated Pavement Layer Moduli for Flexible Pavement (Three – Layer
System) ................................................................................................................................ 342

ix

LIST OF FIGURES
Figure 2.1 MDOT Regions (MDOT) .............................................................................................. 8
Figure 2.2 Gradations (Mayrberger et al 2007) ............................................................................ 19
Figure 2.3 Laboratory modulus of several granular materials at different gradations (Mayrberger
et al 2007) .............................................................................................................................. 24
Figure 3.1 Stress-deformation loop (hysteresis loop) showing the deviatoric stress, and the
resilient and plastic strains ..................................................................................................... 54
Figure 3.2 Examples of regular deflection basins ......................................................................... 57
Figure 3.3 Examples of irregular deflection basins ...................................................................... 58
Figure 3.4 Distribution of base types in flexible pavements where FWD tests were conducted . 61
Figure 3.5 Distribution of base types in rigid pavements where FWD tests were conducted ...... 61
Figure 3.6 FWD test locations in the State of Michigan............................................................... 62
Figure 4.1 Pavement structures used for backcalculation ............................................................. 79
Figure 4.2 Pavement cross-sections for flexible pavements with a crushed asphalt layer ........... 80
Figure 4.3 Impact of unbound granular layer modulus on the rigid pavement deflection basin .. 82
Figure 4.4 Unbound granular layer moduli for rigid pavements .................................................. 84
Figure 4.5 Backcalculated PCC modulus values obtained from the MICHBACK software versus
those from the AREA method ............................................................................................... 84
Figure 4.6 Average backcalculated granular layer and the roadbed modulus of rigid pavement
obtained from the two layered system for various roadbed soils .......................................... 90
Figure 4.7 Distribution of the backcalculated granular layer moduli for rigid pavements for all
data, case 1 ............................................................................................................................. 91
Figure 4.8 Distribution of the backcalculated granular layer modulus for rigid pavements after
deleting the upper and lower 10% of the backcalculated moduli, case 2 .............................. 92
Figure 4.9 Distribution of the backcalculated granular layer modulus for rigid pavement after
deleting the upper and lower 20% of the backcalculated moduli, case 3 .............................. 93
Figure 4.10 Distribution of the backcalculated granular layer modulus for rigid pavement for
th
backcalculated moduli less than the 75 percentile value, case 4 ........................................ 95
x

Figure 4.11 Unbound granular layer moduli for flexible pavements (two-layer system) ............ 96
Figure 4.12 Unbound granular layer moduli for flexible pavements (three-layer system) .......... 97
Figure 4.13 A summary of the tests converged in two and three layer analyses ........................ 107
Figure 4.15 Distribution of backcalculated base and subbase moduli (three layered system) ... 110
Figure 4.14 Average backcalculated layers and roadbed soil moduli obtained from two and three
layered systems for various types of roadbed soils ............................................................. 111
Figure 4.16 Distribution of the backcalculated base moduli of flexible pavements using three
layered system, case 1 ......................................................................................................... 112
Figure 4.17 Distribution of the backcalculated subbase moduli of flexible pavements using three
layered system, case 1 ......................................................................................................... 113
Figure 4.18 Distribution of the backcalculated base moduli of flexible pavements using three
layered system after deleting the upper and lower 10 percent of the backcalculated moduli,
case 2 ................................................................................................................................... 115
Figure 4.19 Distribution of the backcalculated subbase moduli of flexible pavements using three
layered system after deleting the upper and lower 10 percent of the backcalculated moduli,
case 2 ................................................................................................................................... 115
Figure 4.20 Distribution of the backcalculated base moduli of flexible pavements using three
layered system after deleting the upper and lower 20 percent of the backcalculated moduli,
case 3 ................................................................................................................................... 117
Figure 4.21 Distribution of the backcalculated subbase moduli of flexible pavements using three
layered system after deleting the upper and lower 20 percent of the backcalculated moduli,
case 3 ................................................................................................................................... 117
Figure 4.22 Distribution of the backcalculated base moduli of flexible pavements using three
th
layered system for data less than the 75 percentile value of the backcalculated moduli, case
4 ........................................................................................................................................... 119
Figure 4.23 Distribution of the backcalculated subbase moduli of flexible pavements using three
th
layered system for data less than the 75 percentile value of the backcalculated moduli, case
4 ........................................................................................................................................... 119
Figure 4.24 Distribution of the backcalculated granular layer moduli ....................................... 121
Figure 4.25 Comparison between backcalculated granular layer resilient moduli for flexible and
rigid pavements.................................................................................................................... 122
Figure 4.26 Impact of unbound granular layer moduli on the thicknesses of concrete slab and the
HMA layer ........................................................................................................................... 123
xi

Figure 4.27 Averages of the backcalculated granular layer resilient modulus from two layered
system for each material type for all backcalculated moduli data, case 1 ........................... 124
Figure 4.28 Averages of the backcalculated granular layer resilient modulus from two layered
system for each material type after deleting the upper and lower 10 percent of the
backcalculated moduli, case 2 ............................................................................................. 125
Figure 4.29 Averages of the backcalculated granular layer resilient modulus from two layered
system for each material type after deleting the upper and lower 20 percent of the
backcalculated moduli, case 3 ............................................................................................. 125
Figure 4.30 Averages of the backcalculated granular layer resilient modulus from two layered
th
system for each material type for moduli less than the 75 percentile value, case 4. ........ 126
Figure 4.31 Comparison of backcalculated granular layer resilient modulus for dense and open
graded bases from two layered pavement system ............................................................... 127
Figure 4.32 Laboratory measured resilient modulus of various granular materials ................... 129
Figure 4.33 Comparison between equivalent and backcalculated granular layer resilient modulus
for all tests, case 1................................................................................................................ 134
Figure 4.34 Comparison between equivalent and backcalculated granular layer resilient modulus
for after deleting the upper and lower 10% of the backcalculated moduli, case 2 .............. 134
Figure 4.35 Comparison between equivalent and backcalculated granular layer resilient modulus
for after deleting the upper and lower 20% of the backcalculated moduli, case 3 .............. 135
Figure 4.36 Comparison between equivalent and backcalculated granular layer resilient modulus
th
for all values less than the 75 Percentile value for the backcalculated modulus, case 4 .. 135

xii

CHAPTER 1
INTRODUCTION
1.1 BACKGROUND
The state of Michigan is geographically located within the AAHSTO identified wet-freeze zone
where frost depth ranges from 2.5 feet near the Ohio and Indiana borders to about 5.0 feet in
parts of the Upper Peninsula. To minimize the impact of freeze-thaw cycles on pavement
performance, granular subbase (typically sand) and base (typically gravel) layers are
conventionally used to provide protection to the roadbed soils from freezing and to minimize the
stresses delivered to the roadbed soils. In general, the strengths of the granular layers are lower
than that of the asphalt or concrete surface layer and, in most cases, higher than the strength of
the roadbed soils.
The most common aggregate types used by the Michigan Department of Transportation (MDOT)
in pavement construction include natural gravel, limestone/dolomite, slag, and crushed concrete.
In most cases, the types of aggregate used in pavement construction are those available in the
aggregate queries near the construction site. Further, MDOT specifies open or dense graded
aggregate bases. The angularity of the aggregates varies from rounded (river gravel) to angular
(crushed stones). Finally, the thickness of the granular layer is a function of the pavement type
(flexible versus concrete) and varies from 9 to about 36 inches.
The value of resilient modulus of a given granular layer depends on the type, angularity and
gradation of the aggregates used. In this study, the values of the resilient moduli of the granular
layers throughout the State of Michigan were backcalculated using Nondestructive Deflection
Test (NDT) data obtained by MDOT using the KUAB Falling Weight Deflectometer (FWD).
The backcalculated resilient modulus values of the surface and granular layers and those of the

1

roadbed soil were compared to:


The resilient modulus values of the roadbed soils that were backcalculated in a previous
study to document the distribution of the design modulus of the roadbed soils throughout
the State of Michigan.



The resilient modulus values of granular base and subbase materials obtained from
laboratory tests that were conducted at Michigan Technological University (MTU).



Typical resilient modulus values reported by other State Highway Agencies and those
recommended by the new AASHTO Mechanistic-Empirical Pavement Design Guide (ME PDG).

1.2 PROBLEM STATEMENT
The new Mechanistic Empirical Pavement Design Guide (M-EPDG) developed under NCHRP
Project 1-37A, as well as most existing pavement design methods such as the 1993 AASHTO
Design Guide require the resilient moduli of the Hot Mix Asphalt (HMA), aggregate base and
sand subbase layers, and the resilient modulus of the roadbed soils as the primary input
parameters. Said moduli could be measured in the laboratory or backcalculated using Falling
Weight Deflectometer (FWD) data (deflection data). Many highway agencies and engineers
believe that laboratory testing for determining the resilient moduli is too complicated, unreliable,
and very expensive to perform on a routine basis. In many cases, pavement designers either
simply assume resilient modulus values or use various predictive or empirical equations to
estimate them. For over 30 years researchers and practitioners have been developing methods to
predict the laboratory resilient modulus of subgrade soils based on:


Correlations to soil strength parameters such as unconfined compressive strength,
Dynamic Cone Penetrometer data, California Bearing Ratio, Hveem Stabilometer R-

2

value, and so forth.


Empirical relationships with soil descriptive or physical properties such as grain size,
aggregate angularity, Atterberg limits, moisture content, density, soil classification and so
on.

Although a large number of these empirical correlations currently exist, their accuracy and
robustness are highly variable and generally unknown to the users (the pavement designers).
Backcalculation of resilient modulus using nondestructive deflection test (NDT) data has its own
merit and advantages which include:


The test is nondestructive in nature, quick, and could be conducted along and across the
pavement structure to study the variability of the material moduli.



The NDT requires minimum traffic control and traffic disruption.



Tests could be conducted to simulate various traffic loads.



The tests are conducted under insitu conditions such as temperature, moisture, and stress
boundary values/conditions.

For the unbound base and subbase pavement layers, the M-E PDG Level 1 design of new
pavements calls for laboratory material testing and for nondestructive testing using FWD for
rehabilitation/reconstruction purposes. The Level 2 design, on the other hand, allows the use of
correlations that describes the relationships between some material indices, strength parameters
and resilient modulus. Finally, the Level 3 design calls for the use of the AASHTO
recommended default resilient modulus values based on the AASHTO classification system or
on the Unified Soil Classification System (USCS).
In this study, the FWD deflection data collected for the roadbed resilient modulus study (Dawson
2008) were used to backcalculate the resilient moduli of the various base and subbase layers.

3

1.3 OBJECTIVES
The main objective of this project is to characterize the resilient moduli of the various granular
base and subbase materials used by MDOT for the purpose of designing new pavements or
rehabilitating/reconstructing existing ones using the existing 1993 AASHTO design procedure or
the new M-E PDG.
To accomplish the objective, a research plan consisting of three tasks was developed and is
presented in the next section.
1.4 RESEARCH PLAN
As stated above, the research plan for this study consists of the three tasks detailed below.
Task 1 – Information Gathering – In this task, the research team has become familiar with the
types and variations of the unbound aggregate base and subbase materials used by MDOT in the
construction and rehabilitation of flexible and rigid pavements. In particular, the specifications
regarding dense- and open-graded aggregate bases were obtained from MDOT. Further, the final
report submitted by researchers at Michigan Technological University (MTU) to MDOT
regarding the lab testing of unbound granular materials used in Michigan was thoroughly
reviewed. The objectives of the review include:


Getting familiar with the laboratory test procedure and the test parameters used by the
research team at MTU. For all tests, each load cycle consisted of 0.1 second pulse period
and 0.9 second relaxation (rest) time.



Determine whether or not the types of materials tested by MTU cover the spectrum of the
granular material types used by MDOT in the construction of open graded aggregate
base.



Establish a database for the purpose of developing relationships between the

4

backcalculated resilient modulus of open graded materials and the laboratory obtained
values that are listed in the MTU report.


Scrutinize the impact of boundary conditions (test parameters) on the magnitude and
variability of the laboratory obtained resilient modulus and their relationships to the field
(in-situ) boundary conditions.



Assess the applicability of the MTU laboratory test results to the various design levels of
the M-EPDG.

The summary of the review of MTU report is presented in Chapter 2. Finally, all information and
existing data that are needed for the other tasks in this study were tabulated. These include:


The locations of all FWD tests that were used in the ongoing roadbed characterization
study. This would include FWD tests that were conducted in different environmental
seasons prior to and during the roadbed study and new FWD tests that will be conducted
by MDOT through October of 2009. The tables will also include the pavement crosssection data (thickness and material type) and the type of roadbed soils. When possible,
the locations of FWD tests that were conducted on pavements supported by dense- and
open-graded bases will be identified and included in the table.



The information obtained from MDOT regarding the depth of frost penetration especially
in the northern part of the Lower Peninsula and in the Upper Peninsula.

Task 2 — Backcalculation of Layer Moduli - All deflection data collected during the on-going
roadbed study or obtained from MDOT was used to backcalculate the layer moduli of the various
pavement layers and the roadbed soils. Although the moduli of all pavement layers will be
backcalculated, tabulated and reported to MDOT, only the resilient modulus of the granular
bases, subbases and stabilized bases are subjected to further analyses in this study. Such analysis

5

includes:


Possible correlations between the backcalculated and the laboratory measured resilient
modulus values that are included in the MTU report.



Possible correlations between the physical characteristics of the aggregates (open- and
dense-graded) and the backcalculated resilient modulus values as well as the laboratory
obtained MR values.

Task 3 – Resilient modulus Design Values - The material parameters to be used in the design
of pavements are dependent on the pavement type being designed and the design method being
used. For example, in the 1993 AASHTO Pavement Design Guide, the coefficients and moduli
of all pavement layers and the effective resilient modulus of the roadbed soils are some of the
required material inputs for flexible pavements. For rigid pavement design, on the other hand,
the modulus of subgrade reaction is one of the required inputs. For the M-EPDG, the modulus of
all pavement layers and the roadbed soils are some of the required inputs.
For flexible pavements, the backcalculation of layer moduli using deflection data yield the
modulus values of the various layers and roadbed soils. On the other hand, the backcalculation
for rigid pavements yield the modulus of subgrade reaction and the elastic modulus and the
radius of relative stiffness of the concrete slabs. Hence, further analysis is needed to obtain the
modulus values of the granular materials.
After obtaining the backcalculated resilient modulus of the unbound granular materials and
comparing these values to the MTU laboratory obtained values, one design resilient modulus
value will be recommended for each of the following materials:


Dense-graded bases



Open-graded bases

6



Stabilized bases



Sand subbase

1.5 THESIS LAYOUT
The thesis is composed of the following five chapters:
Chapter 1 – Introduction
Chapter 2 – Literature Review
Chapter 3 – Laboratory and Field Investigation
Chapter 4 – Data Analysis
Chapter 5 – Summary, Conclusions and Recommendations

7

CHAPTER 2
LITERATURE REVIEW
2.1 REVIEW OF MDOT PRACTICES
The Michigan Department of Transportation (MDOT) divides the State of Michigan into seven
self administered regions: Superior, North, Grand, Bay, University, Southwest, and Metro, as
shown in Figure 2.1. For some pavement projects, each region develops and uses its own practice
to estimate the required engineering properties of the pavement materials and the roadbed soils.
These practices are mainly based on local conditions, experience, and past practices.

Figure 2.1 MDOT Regions (MDOT)
In each of the seven regions, various types of granular bases and subbases, stabilized granular
materials, cemented and lean concrete, are used in their pavement construction. Most of the

8

granular bases consist of natural gravel, dolomite, slag, or crushed concrete. The particular
materials used in construction of the base layer depend on its availability near the construction
site. In general, in the project plan, MDOT specifies the gradation of the unbound granular layer.
Modulus values of 30 ksi for dense graded granular bases and 24 ksi for open graded granular
bases are typically used by MDOT during the pavement design process.
2.2 CHARACTERIZATION OF THE UNBOUND GRANULAR MATERIALS
Soil classification systems are used to differentiate between the various types of soils. The
Unified Soil Classification System (USCS), the United States Department of Agriculture
(USDA), and the American Association of State Highway and Transportation Officials
(AASHTO) soil classification systems are widely used by most of the transportation agencies.
Michigan Department of Transportation (MDOT) follows a separate soil classification system
called Uniform Field Soil Classification System (UFSCS). Detailed description of these systems
can be found elsewhere (Sessions 2008).
The UFSCS is primarily based on visual and manual examination of soil samples with respect to
texture, plasticity, color, structure and moisture. A few examples of determining the soil type
based on UFSCS include: (a) identification of sand particles and (b) the assumption that all
particles that can be seen by the naked eye can be retained on the No. 200 sieve. The AASHTO
soil classification is based on the particle size distribution and Atterberg limits. Granular
materials are defined as the materials for which less than 35% of the particles by weight pass
through the No. 200 sieve (Holtz and Kovacs 1981). Granular materials are classified into 3
groups, A-1, A-2 and A-3, based on the differences in their grain size distributions. Finally, The
USCS defines granular materials as those materials for which no more than 50% of the particles
by weight pass through No. 200 sieve. If a greater percent of coarse fraction is retained on the

9

No. 4 sieve it is considered as gravel or else it is treated as sand (Holtz and Kovacs 1981). A
comparison between the USDA, the USCS and the AASHTO soil classification is presented in
the Table 2.1.
Table 2.1 Comparison between three soil classification systems (USDA 1992)

Classification

Percent Passing Sieve Number

USDA
texture

Liquid
Limit

Plastic
Limit

USCS
Muck

AASHTO

4

10

40

200

PT

A-8

100

100

90-100

40-100

0-14

NP

A-2-4, A-3,
A-1-b, A-2,
A-3, A-2

40100

25100

15-90

0-35

<25

NP

A-2, A-4,
A-1-b, A-1,
A-2-4, A-3

85100

60100

30-90

3-55

<30

NP

A-4, A-6,
A-7, A-2

95100

85100

60-100

30-95

<45

NP/P

A-2-4, A-4,
A-2, A-1,
A-1-b, A-6

70100

60100

35-90

15-75

<35

NP

70-100

35-90

25-45

NP/P

70-100

50-90

15-45

NP/P

30-70

0-15

0-14

NP

65-95

45-95

30-65

P

50-100

30-90

25-50

NP/P

A-6, A-4,
A-7, A-2

95100

75100

Mucky
Sand

SP-SM,
SM, SP,
GP, GPGM, GM
SM, SCSM, ML,
CL-ML,
SP-SM, SP
ML, CL,
CL-ML,
SC, SM,
CH
SM, SCSM, ML,
CL-ML,
SC, CL
CL, CLML, SC,
SC-SM
CL, CLML, ML
SM, SP,
SP-SM

A-4, A-6,
A-7
A-1-b, A-24, A-3

Clay

CH, CL

A-6, A-7-6

90100
95100
90100
85100

75100
75100
85100
60100

Sand

Loamy
Sand

Silty
Loam

Sandy
Loam
Clay
Loam
Loam

Silty
CL, SC,
A-4, A-6,
Clay
CL-ML
A-7
NP = non-plastic, plastic limit<10
P = plastic soil, plastic limit>10

10

2.3 ROLE OF THE RESILIENT MODULUS OF UNBOUND GRANULAR LAYER IN
THE M-E PDG:
The new AASHTO Mechanistic-Empirical Pavement Design Guide (M-E PDG) is an analysis
tool developed to predict the performance of newly constructed and rehabilitated pavements
based on the design thicknesses and material properties taking into account the effect of climate
at the construction site. The inputs to M-E PDG are classified into 4 different categories: traffic,
climate, material, and inventory. For example, the traffic inputs include the Average Annual
Daily Truck Traffic (AADTT), truck and axle load distribution, and so forth. Examples of
material inputs include the modulus and Poisson’s ratios of the pavement layers and roadbed
soils. Climatic data include the maximum and minimum daily temperatures, precipitation for the
past 30 years (the data could be obtained from weather station located near the construction site).
The required inventory input data include the thicknesses of the pavement layers, the start and
completion date of the project and so forth. It should be noted that the inputs for climatic and
inventory data remain the same irrespective of the design level.
The same methodology is adopted by the M-E PDG to predict the pavement performance is used
in the three design levels (Prozzi et al 2006). However, the degree of reliability varies from high
for design level 1 to low for design level 3.
The accuracy of some of the input data depends upon the design level. Three design levels are
specified in the M-E PDG. Design level 1 requires the most accurate and site specific data
whereas design level 3 is based on default values and existing correlations.
The three design levels are detailed below.
2.3.1 The M-E PDG Design Level 1 – Laboratory Tests and NDT
For level 1 pavement design, the M-E PDG recommends that the resilient modulus values of

11

unbound granular materials, subgrade, and bedrock be determined in the laboratory using cyclic
load tri-axial tests. The tests should be conducted on representative material samples according
to one of two standard test procedures. These procedures are detailed in:


The NCHRP 1-28A report titled, “Harmonized Test Methods for Laboratory
Determination of Resilient Modulus for Flexible Pavement Design.”



The AASHTO test standard T307, “Determining the Resilient Modulus of Soil and
Aggregate Materials.”

The two test procedures describe the laboratory preparation, testing, and computation of the test
results. For unbound granular materials, the stress conditions used in the test must represent the
range of stress states likely to be developed beneath flexible or rigid pavements subjected to
moving wheel loads. Stress states used for modulus testing are based upon the depth at which the
material will be located within the pavement system. Hence, the stress states for specimens to be
used as base or subbase or subgrade may differ considerably.
The M-E PDG includes the generalized NCHRP 1-28A MR constitutive model shown in
equation 2.1. The model coefficients (k1, k2, and k3) are estimated using laboratory generated
MR data and linear or nonlinear regression analyses.

θ
MR  k1  
p 
 a

k2

Where, MR = resilient modulus, psi
θ = bulk stress (psi) = ζ + ζ + ζ
1

2

3

ζ1 = major principal stress (axial stress, psi)

12

 τ oct 

p 

 a 

k3
Equation 2.1

ζ2 = intermediate principal lateral stress (psi)
ζ = minor principal lateral stress (psi), in a triaxial test environment, the values of ζ
3

2

and ζ are the same and equal to the confining pressure
3

η

oct

= octahedral shear stress (psi)

p = atmospheric pressure (psi)
a

k , k , k = regression coefficients (obtained by fitting resilient modulus test data to the
1

2

3

constitutive model of equation 2.1)
The constitutive model coefficients estimated for each test specimen should have a correlation
2

coefficient (R ) more than 0.90. Constitutive model coefficients from similar soils and test
2

specimen conditions can be combined to obtain a "pooled" k1, k2, and k3 values. If R for a
particular test specimen is less than 0.90, the test results and equipment should be checked for
possible errors and/or test specimen disturbance. If no errors or disturbances are found, the use of
a different constitutive relationship is recommended.
The value of the regression coefficient k1 is proportional to Young’s modulus. Thus, the values
for k1 should be positive since MR values are always positive. Increasing the bulk stress, θ,
should produce stiffening or hardening of the material, which results in a higher MR values.
Therefore, the exponent k2, of the bulk stress term in the constitutive equation should also be
positive. The value of the regression coefficient k3 (the exponent of the octahedral shear stress
term) should be negative since increasing the shear stress will produce material softening (i.e.,
lower MR values). It is very important to note that:

13



The inputs to the M-E PDG include the values of the regression coefficients k1, k2, and
k3 (not the actual values of MR test data).



The statistical analysis for the determination of the values of k1, k2, and k3 is conducted
outside the M-E PDG software.

Finally, level 1 design is applicable to new construction, reconstruction, and major rehabilitation.
For new construction, the materials to be used by MDOT or by the contractor can be sampled
and tested. For reconstruction, material samples can be obtained through destructive testing (i.e.,
coring and drilling). On the other hand, for rehabilitation and reconstruction of existing
pavements, MR for level 1 design could be obtained by performing NDT using a falling weight
deflectometer (FWD) and backcalculating the layer moduli.
2.3.2 The M-E PDG Design Level 2 – Correlations to Other Material Properties
In the M-E PDG design level 2, correlation equations that were developed to relate soil and
unbound granular material index properties and strength to resilient modulus values can be used
to estimate the MR values. The relationships could be direct or indirect. The direct relationships
relate the index to the MR values directly. Whereas, the indirect relationships are based on two
step correlations such as relating a known material parameter to California Bearing Ratio (CBR)
and then estimating the MR values using the CBR values. Several correlation equations or
models recommended in the M-E PDG for estimating MR are provided in Table 2.2. The Design
Guide software allows the users the following two options:


Input a representative value of MR values and use the Environment Integrated Climatic
Model (EICM) to incorporate the seasonal climatic effects (such as the effects of freezing
and thawing, and so on). In this option, the EICM estimates the temperature and moisture

14

profiles within the pavement system throughout the pavements design life which are then
used to estimate the effective and representative MR value that account for the climatic
effects.


In this option, the users obtain representative samples and test them under the climatic
conditions anticipated for each of the 12 months of the year and directly input the results
to the EICM.
Table 2.2 Correlation equations included in the M-E PDG for Design level 2

Strength/Index
Properties

Model

Comments
0.64

CBR

R-value

AASHTO
layer
coefficient

Mr = 2555 (CBR)
Mr in psi

Mr = 1155 + 555 R
Mr in psi

a2 +0.977
0.249

Mr =
Mr in psi

CBR = California
Bearing Ratio
( percent)

AASHTO T193, “The
California Bearing
Ratio”

R = R-value

AASHTO T 190,
“Resistance R-Value
and Expansion
Pressure of Compacted
Soils”

a2 = AASHTO layer
coefficient for base
layer

PI = plasticity index
PI and
gradation

DCP

R=

75
P200 = percent
1+0.728(P200 *PI)
passing no. 200
sieve size

R=

295
D P1.12

Standard Test

CBR = California
Bearing Ratio,
percent
DCP = Dynamic
Cone Penetration
index, mm/blow

15

AASHTO Guide for
the Design of
Pavement Structures,
1993
AASHTO T27, “Sieve
Analysis of Coarse and
Fine Aggregates”
AASHTO T90,
“Determining the
Plastic Limit and
Plasticity Index of
Soils”
ASTM D 6951,
“Standard Test Method
for Use of the Dynamic
Cone Penetrometer in
Shallow Pavement
Applications”

2.3.3 Level 3 – Pavement Design - Typical MR Values Based on Calibrations

For design level 3, the M-E PDG includes recommended MR input values as listed in table 2.3.
The values are based on:


The national averages of MR values adjusted to account for the effect of shallow bedrock
and other in-situ conditions that influence the pavement foundation strength.



Data obtained from the long-term pavement performance (LTPP) test sites.



The MR values of subgrade, base, and subbase materials that were tested at their
optimum moisture conditions.

Significant caution should be taken when using the M-E PDG level 3 recommended MR values
as they are very approximate. Results of tests performed for pavement design levels 1 and 2 are
strongly preferred, especially FWD tests and backcalculation. The reason for caution is that the
representative MR value to be used by the pavement designer is a function of the thickness of the
materials and the depth to stiff layer. For semi-infinite conditions (thickness of 20 ft or more),
the M-E PDG recommended MR value of 40,000 psi can be justified. However, for a few feet
thick materials overlaying week or stiff materials, then the composite MR should be used.
Hence, an extensive knowledge of the sub-layers on which the pavement is to be constructed
must be obtained. Note that for new pavements, reconstruction, and rehabilitation; the material
type may be obtained by reviewing historical boring records and material reports or county soil
reports. The presence of bedrock is important and should always be investigated.
Finally, the above stated M-E PDG pavement design level 3 is applicable to new design,
reconstruction, and rehabilitation.

16

Table 2.3 Typical MR Values used in M-E PDG
Classification
System

AASHTO

USCS

pounds/square inch
Typical
MR Range
MR
38,500 - 42,000
40,000
35,500 - 40,000
38,000
28,000 - 37,500
32,000
24,000 - 33,000
28,000
21,500 - 31,000
26,000
21,500 - 28,000
24,000
24,500 - 35,500
29,000
21,500 - 29,000
24,000
17,000 - 25,500
20,000
13,500 - 24,000
17,000
8,000 - 17,500
12,000
5,000 - 13,500
8,000
5,000 - 13,500
8,000
8,000 - 17,500
11,500
13,500 - 24,000
17,000
17,000 - 25,500
20,000
28,000 - 37,500
32,000
24,000 - 33,000
28,000
21,500 - 31,000
25,500
24,000 - 33,000
28,000
21,500 - 31,000
25,500
24,000 - 33,000
28,000
21,500 - 28,000
24,000
28,000 - 37,500
32,000
39,500 - 42,000
41,000
35,500 - 40,000
38,000
28,000 - 40,000
34,500
35,500 - 40,500
38,500
28,000 - 39,000
34,000
31,000 - 40,000
36,000
24,000 - 37,500
31,000
33,000 - 42,000
38,500

Material
Classification
A-1-a
A-1-b
A-2-4
A-2-5
A-2-6
A-2-7
A-3
A-4
A-5
A-6
A-7-5
A-7-6
CH
MH
CL
ML
SW
SP
SW - SC
SW - SM
SP - SC
SP - SM
SC
SM
GW
GP
GW - GC
GW - GM
GP - GC
GP - GM
GC
GM

17

2.4 RESILIENT MODULUS OF GRANULAR MATERIALS IN MICHIGAN
Cyclic load triaxial tests were conducted at Michigan Technological University (MTU) to
determine the resilient modulus of various granular materials (crushed concrete, natural gravel,
slag, and dolomite), that are typically used in pavement construction projects in Michigan
(Mayrberger et al 2007). During the study, which was sponsored by MDOT, the test samples
were compacted using three gradations (4G lower bound, 4G upper bound, and 4G maximum
density), and four moisture conditions (as compacted, wetting curve, drying curve, and fully
saturated).
2.4.1 Gradation
The upper bound gradation is made of fine aggregate content, whereas the lower bound is made
of coarse aggregate content. The maximum density gradation was developed using the Fuller’s
equation with a power of 0.45 [PP = (D/Dmax)

0.45

].

Where, PP = percent passing sieve with D opening,
D = the opening of the sieve in question, and
Dmax = the maximum particle size.
The gradation specifications used in preparation of the test samples are presented in Figure 2.2.
2.4.2 Moisture Condition
Each aggregate type was compacted at each of the four gradations ant tested at the following four
different moisture conditions:


As compacted – The moisture condition at which the specimen was compacted. The
moisture contents and the unit weights of the samples are listed in Table 2.4.



Wetting curve – The wetting curve simulates movement of water upward through the
granular material by capillary action which is captured by monitoring the weight of the

18

water source at the bottom of the specimen. However, none of the test samples showed
any propensity for the capillary movement of water.


Drying curve – The drying curve simulates water draining from the base course. The
weight of the drained water of a fully saturated specimen was monitored and later plotted
against time until the water discharge reached equilibrium. The drying curves for
different gradations of all material types can be found in (Mayrberger et al 2007).
Fully saturated – Fully saturated condition represents the situation where all available
voids in the test sample are filled with water without any possible drainage.

100
80
Percent Passing (%)



60
40
20
0
100

10

1

0.1

Passing Sieve Size (mm)
Upper Bound

Lower Bound

Maximum Density

Figure 2.2 Gradations (Mayrberger et al 2007)

19

0.01

Table 2.4 Granular material type, gradation designation, dry unit weight and moisture contents of
the test samples (Mayrberger et al 2007)

Granular
Material Type

Dry Unit
Weight (pcf)

Gradation

Moisture
Content (%)

4G Lower Bound

3.5

143

4.5

128

2.6

4G Upper Bound

148

3.2

150

3.5

4G Lower Bound

105

4.5

4G Upper Bound

116

5.5

Maximum Density

127.5

7.5

4G Lower Bound

102

6

4G Upper Bound

119

7

Maximum Density

Crushed
Concrete

140

Maximum Density

Slag

4G Upper Bound

4G Lower Bound
Dolomite

3.5

Maximum Density

Natural Gravel

122

120

8.6

2.4.3 Laboratory Tests
The AASHTO’s Standard Test Method T 307-99 (Modulus of Soils and Aggregate Materials)
was used to determine the Resilient moduli of all test specimens except the fully saturated ones.
The T 307-99 test protocol has the 15 different stages listed in Table 2.5. For the drained test, the
drainage lines were open and water allowed to drain out of the sample, hence, no excess pore
water pressure develops upon the application of deviatoric stresses. Whereas, for the undrained
test, the drainage line are closed, increasing the deviatoric stress causes the excess pore water
pressure to increases and the effective stress to decrease causing softening in the sample. The
undrained tests were halted at each stage and the sample was allowed to drain to reduce the
excess pore water pressure. Saturation of the test samples was achieved by a combination of

20

high confining stress and pore water pressure. The effective stresses of the undrained test
samples are listed in Table 2.6.
Table 2.5 Different stages of the T 307-99 test protocol (Mayrberger et al 2007)
Sequence
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Maximum Stress
ζ1 (psi)
6
9
12
10
15
20
20
30
40
25
30
45
35
40
60

Confinement Stress
ζ3 = ζ' (psi)
3
3
3
5
5
5
10
10
10
15
15
15
20
20
20

Deviator stress
ζd (psi)
3
6
9
5
10
15
10
20
30
10
15
30
15
20
40

2.4.4 Summary of the Results
A summary of the effect of material type, gradation and moisture condition on the resilient
modulus of granular materials is presented in this section. The detailed discussion can be found
elsewhere (Mayrberger et al 2007).
The behavior of granular materials changed from over consolidation to normal consolidation at a
bulk stress of 40 psi (Mayrberger et al 2003). Hence the resilient modulus and bulk stress were
broken into two conditions, over and normal consolidation. When the behavior of the granular
materials in each consolidation condition was treated separately, a linear relation between the
resilient modulus and the bulk stress was found.

21

Table 2.6 Effective stress for 15 stages of T 307-99 for a fully saturated condition (Mayrberger et
al 2007)
Sequence
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Confinement Stress
ζ3 (psi)
115
115
115
115
115
115
115
115
115
115
115
115
115
115
115

Pore Pressure
u (psi)
112
112
112
110
110
110
105
105
105
100
100
100
95
95
95

Effective stress
ζ’ = ζ3 – u (psi)
3
3
3
5
5
5
10
10
10
15
15
15
20
20
20

Effect of Gradation - For all materials, the lower bound gradation was found to be the stiffest
and the upper bound gradation was stiffer than the maximum density gradation. This relation is
found to be true in both normally and over consolidated samples. The stiffness of the granular
material decreased as the ratio of fine to coarse aggregates increased.
Effect of Material type - Natural gravel was the softest of all material types in both the normal
and the over consolidation regions. Slag and dolomite are stiffer than natural gravel by 15 – 50%
and crushed concrete is stiffer by 7 – 29%. Dolomite and Slag are almost similar in stiffness and
produced the stiffest responses. Crushed concrete lies in between slag and dolomite and Natural
gravel. It is 4 – 15 % softer than slag and dolomite.
Effect of Moisture Content - For all the three gradations, fully saturated condition showed
marginal softening; however, for some materials considerable softening was observed. There
was marginal softening or no change in stiffness for drying curve moisture content. Wetting

22

curve moisture content either caused stiffening or there was no effect on the stiffening. The
effects of moisture conditions on the material stiffness are presented in Table 2.7.
Table 2.7 Effect of moisture conditions on the stiffness of granular materials (Mayrberger et al
2007)
Moisture
Condition
AsCompacted
Wetting
4G Lower
Curve
Bound
Drying
Gradation
Curve
Fully
Saturated
AsCompacted
Wetting
4G Upper
Curve
Bound
Drying
Gradation
Curve
Fully
Saturated
AsCompacted
Wetting
Maximum
Curve
Density
Drying
Gradation
Curve
Fully
Saturated
Gradation

Natural
Gravel

Dolomite

Slag

Crushed
Concrete

Standard

Standard

Standard

Standard

similar

NA

NA

similar

softer

similar

similar

softer

softer

softer

similar

softer

Standard

Standard

Standard

Standard

Stiffer

Stiffer

similar

similar

marginally
softer

similar

softer

similar

Standard

Standard

Standard

Standard

marginally
stiffer

similar

similar

Stiffer

similar

similar

similar

Stiffer

similar

similar

softer

Stiffer

marginally
stiffer
marginally
softer

similar
similar

2.4.5 Laboratory Resilient Modulus of Unbound Granular Materials
As stated earlier, the resilient modulus of several granular materials compacted at various
gradations and moisture contents were measured using cyclic load triaxial tests. Since these
modulus values are stress dependent, the laboratory tests should be conducted to simulate the
state of stress in the field. For a typical pavement cross section, the vertical and radial stresses at
the centre of the base layer due to a 9000 pound load are about 12 and 2 psi, respectively. Hence,

23

the laboratory cyclic load triaxial tests were conducted using confining pressure of 3 and axial
stress of 12 psi. A summary of the laboratory measured resilient modulus values of the unbound
granular materials is presented in Figure 2.3 (Mayrberger et al 2007).

Granular modulus (ksi)

25
20
15
10

5

Slag - 4G Max Density

Slag - 4G Upper

Slag - 4G Lower

Dolomite - 4G Max
Density
Natural Gravel - 4G
Lower
Natural Gravel - 4G
Upper
Natural Gravel - 4G
Max Density

Dolomite - 4G Upper

Dolomite - 4G Lower

Crushed Concrete - 4G
Lower
Crushed Concrete - 4G
Upper
Crushed Concrete - 4G
Max Density

0

Material type and gradation
Figure 2.3 Laboratory modulus of several granular materials at different gradations (Mayrberger
et al 2007)
The following conclusions were made from figure 2.3:


The average range of the resilient modulus of all the granular materials irrespective of the
material type was between 15,000 psi and 20,000psi.



The variation in the resilient modulus was primarily due to changes in the moisture
content.



Gradation type had very little impact on the resilient modulus value of the unbound
granular materials. Although insignificant, the resilient modulus value of all materials
except crushed concrete was found to decrease as the gradation became denser. For the

24

crushed concrete, the resilient modulus value was almost independent of the material
gradation.
2.5 NONDESTRUCTIVE DEFLECTION TESTS (NDT)
Nondestructive deflection test (NDT) is one of many field tests used by Departments of
Transportation (DOT)’s to evaluate the pavement structural capacity. The advantages of using
NDTs include (a) their non destructive nature, and (b) insignificant lane closure with minimum
impact on traffic flow. The results from the NDT’s are used to:


Backcalculate the layer moduli for both flexible and rigid pavements.



Estimate the load transfer efficiency of the dowel bars in rigid pavements.



Evaluate the presence of voids beneath the slab.



Design the thickness of pavement layers for rehabilitation.



Design the thickness of the overlays.

Various types of NDT equipment such as the Benkelman Beam, la Croix Deflectograph, Road
Rater, dynaflect, Cox Device, Falling Weight Deflectometer etc. are available. Detailed
descriptions of the NDT devices can be found in (Mahmood 1993).
In this study, NDTs were conducted using the MDOT KUAB falling weight deflectometer
(FWD). The pavement surface deflection were measured at various distances from the center of
the load and were used to backcalculate the unbound granular layer moduli.
2.5.1 The MDOT KUAB Falling Weight Deflectometer (FWD)
As stated above, the MDOT KUAB FWD was used to conduct the NDTs. The KUAB FWD is
capable of delivering to the pavement surface at various load levels. In all tests in this study, the
9000 pounds load level was used and the pavement surface deflections were measured at
distances of 0, 8, 12, 18, 24, 36 and 60 inches from the center of the load. The 9000 pounds

25

force was achieved through dropping a particular weight at a predetermined distance. The force
of the impact is typically considered a static force at the point of contact. In most analysis
procedures of the deflection data, the pavement layers and the roadbed soil are typically
considered elastic materials.
The weight of the falling mass can be calculated as follows (Kim et al 2006);

W1 H   max   .5K 2 max  0

Equation 2.2

Where, W1 = weight corresponding to the mass M (lbs)
H = height of drop (in)
δmax = maximum pavement deflection (in)
K = spring constant (lb/in)
The impact factor (δmax/δst) can be calculated using equation 2.3.

  2H  

 max /  st  1  1  
   
  st  

1
2

Equation 2.3

Where, δst = static deflection (in)
The impact load is calculated using equation 2.4, by multiplying the static load by the impact
factor.

Pdyn

Where,

1


   2H   2 

 W1 1  1  
    
   st   



Pdyn = impact load (lbs)

26

Equation 2.4

Because of the difficulties associated with measuring the impact load, the force (F) is calculated
by multiplying the drop weight (W) by the height of drop (H).

F  WH

Equation 2.5

The uniformly distributed load can be obtained from equation 2.6.
q

F
A

Equation 2.6

Where, q = applied load to plate (lbs)
2

A = loading plate area (in )
In order to backcalculate the moduli of the pavement layers with high accuracy, it is important to
measure the deflections at the pavement surface with a very minimal error. Any random error in
the measurement of deflection and variability in the thickness of the pavement layers leads to a
high degree of pseudo variability in the backcalculated layer moduli. Hence, the following
recommendations were made in order to reduce the errors in the measurement of deflections
(Irwin et al 1989):


Taking the average of the deflections measured by the FWD by replicating the drop three
to five times at the same load level.



Making at least two drops before recording the deflections for the purpose of seating the
pavement.



Calibrating the FWD every six to twelve months to minimize the possible systematic
errors.

2.6 BACKCALCULATION OF LAYER MODULI
The process of converting the measured pavement surface deflections to layer moduli is called
backcalculation. Backcalculation routines use the pavement surface deflections to determine the

27

layer moduli of the pavement using one or more of the following techniques:


Iterative approach – In this approach, the deflection basin is calculated based on a set of
estimated seed moduli and used as input to the computer program. The software uses the
estimated seed moduli and calculates the pavement surface deflections due to the same
load level used by the FWD to measure the deflection data. The calculated deflections are
then compared to the measured ones. Based on the comparison, the estimated seed
modulus values are then varied and a new set of pavement surface deflections are
calculated. The process is repeated until the differences between the calculated and the
measured deflections are equal to or less than the specified conversion criteria specified
by the users. One of these criteria is the Root Mean Square (RMS) error between the
measured deflection basin and the calculated one. The RMS error is calculated for each
iteration and the layer moduli corresponding to a calculated deflection basin with an
RMS error of less than 2% are considered accepted for flexible pavements. Some of the
backcalculation routines that use iterative approach are MODTAG, MICHBACK,
EVECALC, and so forth.



Database - Deflection basins for all possible combinations of the layer moduli are
calculated and are stored in a database. The moduli values corresponding to the deflection
basin that is closest to the measured deflection basin are considered as the layer moduli.
Example of such computer program is MODULUS.



Empirical Equations – Backcalculation of the pavement layer moduli is based on a set
of empirical equations, which gives a unique modulus for a given set of deflections.
Examples of such method include the AREA, and the NUSBACK methods.

Some of the common assumptions made by the backcalculation routines include:

28



The pavement materials are homogenous, isotropic, and linear elastic.



The load is uniformly distributed over the circular loading plate.



The pavement layers extend horizontally to infinity (no edge effects).



The subgrade is considered to be a semi–infinite half-space.

Backcalculation can only determine the moduli of the pavement layers that have significant
influence on the surface deflections. Deflections that are measured using the FWD are relatively
insensitive to minor variations in the pavement moduli (Irwin 1994).
Various backcalculation programs are available in both the public and the private domains.
Description of some of the backcalculation routines is presented in this section. A list of
available backcalculation programs is presented in Table 2.9.
2.6.1 Backcalculation of Flexible Pavement Layer Moduli
This section provides a summary of some available computer software and methods used in the
backcalculation of flexible pavement layer moduli.
2.6.1.1 The AASHTO Method
This AASHTO method is based on Boussinesq equation (Equation 2.7). The AASHTO method
is based on the concept that pavement surface deflections measured at far distances from the
center of the applied load are mainly due to deflections in the roadbed soils. Hence, Boussinesq
equation is the most widely used equation to backcalculate the resilient modulus (MR) of the
roadbed soils using a single pavement surface deflection (George 2003).

dr 

CP    2 
1

rMR

or MR 

CP   2 
1

rdr

Where, dr = the surface deflection (in) at a distance r (in) from the load



29

Equation 2.7

P = applied load (lbs)
C = correlation/adjustment factor that accounts for the difference between the
backcalculated and the laboratory obtained MR value
MR = resilient modulus (psi)

υ = poison’s ratio of the asphalt layer
r = the radial distance from the center of the applied load (in).
Assuming a Poisson’s ratio of 0.5, Equation 2.7 can be reduced to the following equation
(AASHTO 1993).

M R

0.24CP
dr r

Equation 2.8

AASHTO recommends the use of a C value no greater than 0.33. The minimum distance (r) in
Equations 2.7 and 2.8 is given by the following relationship.


E 
r  0.7 a   D  3 p 

MR 


Where, a = radius of load plate (in)
D = total thickness of pavement layers above the roadbed (in)
Ep = effective modulus of all layers above the roadbed (psi)
Ep in Equation 2.9 can be calculated using Equation 2.10.

30

Equation 2.9


1



MR  d o
1

 1.5

2
q  a1

D E 
 1  3 p 

 a1 MR 





1
D
1  
a 
 1
 Ep 

 MR 




2













Equation 2.10

Where, do = deflection measured at the center of the load plate (in)
a1 = temperature of 68 oF
q = pressure on load plate (psi)
D = total thickness of pavement layers above the subgrade (in)
Ep = effective modulus of all layers above the subgrade (psi)
2.6.1.2 MICHBACK
The MICHBACK computer program for the backcalculation of layer moduli was developed at
Michigan State University with support from the MDOT. The MICHBACK program uses an
extended precision version of CHEVRON program, called CHEVRONX, as a forward
calculation subroutine. The program uses three gradients modified Newtonian algorithm in its
iteration to converge the calculated and the measured deflection basins (Harichandran et. al.
1993). In addition to the layer moduli, the depth to a stiff layer (e.g., bedrock, hard soil, or hard
pan) or the thickness of one layer may also be backcalculated. However, the accuracy of the
backcalculated thickness or depth to stiff layer is questionable. Hence, the program allows the
user to specify the depth to the stiff layer during the backcalculation process. The MICHBACK
software assumes the pavement layers to be homogeneous, isotropic and linearly elastic for its

31

backcalculation routine.
The MICHBACK software is a menu driven and it allows the user to choose between English
and SI units. It can accommodate up to ten FWD sensors. The inputs of the deflection data into
the program could be achieved through reading of user created FWD files in ASCII format,
typing the data using the keyboard, or reading the data arranged in the standard KUAB FWD
files. The input to the program includes the thickness and Poisson’s ratios of the various
pavement layers and the measured deflections corresponding to the selected sensor
configuration. The program also requires the user to input the maximum, minimum and the seed
moduli for each pavement layer and the roadbed soil along with the estimated depth to stiff layer.
After defining all input parameters the program performs the backcalculation and the results can
be viewed on the screen or can be printed to a file. Detailed description of the program can be
found in (Mahmood 1993).
2.6.1.3 MODTAG
MODTAG is a backcalculation software developed by the Virginia Department of
Transportation (VDOT) and Cornell University. MODTAG follows an iterative method that
adjusts the moduli of the pavement layers to match the deflection basin. It uses CHEVLAY2
computer code as a forward calculation engine, which is based on elastic layer system. The
computed deflections using CHEVLAY2 are compared to the measured deflections and the seed
moduli are adjusted to match the difference in the deflections (Irwin 1994). This program can
handle two to fifteen layers, including the bottom layer for which the thickness is assumed to be
semi-infinite. However, no more than five unknown layers are recommended for the analysis.
(Von Quintas et al 2002) used MODTAG (which is also known as MODCOMP4) to
backcalculate the layer moduli of rigid pavements. His results showed that the Root Mean

32

Square (RMS) errors for most deflection basins were equal to or less than three percent. Hence,
in this study, all backcalculated layer moduli where the RMS error was equal to or less than three
percent were considered acceptable.
2.6.1.4 MODULUS 6.0
The computer program MODULUS 6.0 was developed at Texas Transportation Institute. The
program uses WELSEA as the forward calculation subroutine. WELSEA is used to build a
database of computed deflection basin. Once the database is build, a pattern search routine is
used to match measured deflection basin with those in the database to determine the modulus of
the layers in the pavement system (Scullion et al 1990). The maximum number of unknown
layers is limited to 4. MODULUS 6.0 is generally used for the backcalculation of layer moduli of
flexible pavements.
2.6.1.5 EVERCALC
The EVERCALC backcalculation software was written to estimate the elastic moduli of flexible
pavement layers. The program uses an iterative approach to vary the modulus values of the
pavement layers in order to match the calculated and the measured deflection basins within a
pre-specified range of RMS error. EVERCALC program uses the WELSEA elastic layer
computer program as the forward engine to calculate the deflection basin based on a given set of
layer moduli. The program also uses a modified Augmented Gauss-Newton algorithm for
optimization (Lee 1988). Like the MICHBACK software, EVERCALC can handle up to ten
deflection sensors. The program is capable of evaluating the moduli of pavement structure
containing up to five layers.
2.6.2 Backcalculation of Rigid Pavement Layer Moduli
Most of the programs used for backcalculation of the moduli of rigid pavement layer are based

33

on empirical equations. Two of these programs (the AREA Method and the NUS-BACK3) are
briefly described below.
2.6.2.1 AREA Method
AREA method is used for backcalculation of the moduli of the subgrade and the concrete layers
of rigid pavements (Frabizzio 1998). The method is based on the assumption of a slab on
subgrade system. The term “AREA” references the area of the deflection basin where the
deflections are measured at different radial distances from the center of the load. First, the



measured deflections are normalized relative to the peak pavement deflection ( 0 ). The AREA
is then calculated using Equation 2.11. Second, the composite radius of relative stiffness of the
slab is calculated using Equation 2.12 followed by the composite modulus of the concrete slab


*

using Equation 2.13. The non dimensional deflection coefficient (  r ) accounts for the
dependence of pavement deflection on the distance from the load (pavement deflection decreases
with increasing distance from the load) (Frabizzio 1998). The values for


 r* can be calculated

using Equation 2.14 and the regression parameters listed in Table 2.8. Equation 2.15 can then be
used to calculate the modulus of subgrade reaction; the latter is correlated to the resilient



modulus of the roadbed soil through Equation 2.16 (AASHTO 1993). The AAHTO equation
(Equation 2.16) is based on the assumption of slab placed on subgrade. Based on the
backcalculated resilient modulus values of roadbed soils supporting rigid and flexible pavements
throughout the State of Michigan, Dawson modified the AASHTO equation to account for slab
on granular subbase (Dawson 2008). His data showed that the resilient modulus values of
roadbed soils under flexible pavements are about four times higher than the resilient modulus
values obtained using Equation 2.16 for the same roadbed soils supporting rigid pavements. His
modified equation is included as Equation 2.17.
34



8  12  18  24 
36 
60 
AREA    6  5  6  9  18  12 
4

0  0  0  0 
0 
0 


Equation 2.11


 60  AREA  
LN 


 289.708  
l
 0.698 








Ec 



2.566

Equation 2.12

*
12  2 Pl 2 r
1

r h 3

be  
  ae

Equation 2.13

 cl

*
r

Ec h 3
k 
12   2  l 4
1

Equation 2.14

Equation 2.15

MR  19.4(k )

Equation 2.16

MR  (4)(19.4) k

Equation 2.17

Where, AREA = area of deflection basin, (in)

δr = deflection at radial distance of r inches from the application of load (mils)
l = radius of relative stiffness (in)
Ec = modulus of slab (psi)

35

P = load applied on the pavement (lbs)

 = Poisson’s ratio of concrete slab

r* = non – dimensional deflection coefficient at the radial distance r (in)


a, b, c = regression coefficients



k = modulus of Subgrade reaction (pci)
MR = Resilient modulus of subgrade, (psi)
*

Table 2.8 Regression coefficients for δr (Frabizzio 1998)
Radial Distance,
r (inches)
0
8
12
18
24
36
60

a

b

c

0.12450
0.12323
0.12188
0.11933
0.11634
0.10960
0.09521

0.14707
0.46911
0.79432
1.38363
2.06115
3.62187
7.41241

0.07565
0.07209
0.07074
0.06909
0.06775
0.06568
0.06255

The use of fewer sensor locations to calculate the AREA of the deflection basin was found to
provide more accurate results during the backcalculation of layer moduli (Shuo et al 2000).
Hence, it was recommended to use the deflections at the radial distances of 0, 12, 24, and 36
inches from the centre of the load (Hoffman et al, 1981). For the four deflection values measured
at the stated radial distances, the AREA4 and the radius of relative stiffness, l4 are calculated
using Equations 2.18 and 2.19, respectively.

AREA4 

6

0

 0  212  2 24   36 


36

Equation 2.18

  36  AREA4  
 ln  1812.28  

l4   
 2.559







4.387

Equation 2.19

Where, AREA4 = area of the deflection basin under the first 4 deflections (in)
l4 = radius of relative stiffness (in)
The backcalculation procedure presented above is based on the Westergaard’s assumptions of
interior loading on an infinite slab. This assumption causes the backcalculation procedure to
overestimate the modulus of the finite dimension slab and under estimate the modulus of the
subgrade. (Crovetti 1994) conducted finite element analysis of concrete slab using ILLI-SLAB
and developed Equations 2.20 and 2.21 to correct the deflection directly under the center of the
load, δ0 and the radius of relative stiffness, l.

0.80151
 L 



0.71878
l 


*
 est 
 0   0 * 1  1.15085e





Equation 2.20

1.04831
 L 


0.61662
l 



*
 est 
l  lest * 1  0.89434e





Equation 2.21

37

Where, L = length of square slab (in)

 0*

= corrected deflection (in)

lest = radius of relative stiffness (in) backcalculated using equation 2.12
*

l = corrected radius of relative stiffness (in)
For concrete slabs with length equal to or less than twice the slab width the length of the square
slab L, in Equations 2.20 and 2.21 is given by (Khazanovich et al 2001)

L

L1 * L2

Equation 2.22

Where, L = equivalent length (ft)
L1 = slab width (ft)
L2 = slab length (ft)
For slabs where the slab length is greater than twice the slab width, the length of the square slab
is estimated using Equation 2.23.

L

2 * L1

Equation 2.23

However, the errors in the backcalculated modulus values using rovetti’s corrections were
higher when compared to those from the assumption of an infinite slab (Setiadji et al, 2007).
Once again, the concrete slab modulus calculated using the AREA method is based on the
assumption that the slab is placed directly on subgrade. For PCC slabs placed on base layer, the
PCC slab modulus calculated using the AREA method is, in reality, the composite modulus of
the PCC slab and the base layer. Equations 2.24 through 2.26 are used to estimate the PCC slab
and the base layer moduli from the composite PCC modulus from the AREA method based on

38

the assumption that the flexural stiffness of the PCC and the base layers combined is equal to the
sum of the flexural stiffness of the PCC and the base layer (Ioannides et al 1992).

E pcc 

h3
pcc
3
h3  hbase
pcc

Eeffective

3
h pcc
E base  3
E effective
3
h pcc  hbase



E base
E pcc

Equation 2.24

Equation 2.25

Equation 2.26



Where, Eeffective = composite PCC modulus (psi)
β = modular ratio



Epcc = modulus of the surface layer (PCC) (psi)
hpcc = thickness of the concrete slab (in)
Ebase = modulus of the base layer (psi)
hbase = thickness of the base layer (in)
The value of the modular ratio β is less than 1.0 and is defined as the ratio of the modulus of the
base layer to the modulus of the PCC slab. The accuracy of the backcalculated modulus depends
on the accuracy of the estimation of the modular ratio. Modular ratios for various types of
unbound granular bases are presented in (Khazanovich et al 2001). For a typical unbound
granular layer the modular ratio varied from 0.0067 to 0.004. (Smith et al 1995) in their study
concluded that the granular layer modulus was more sensitive to the modular ratio. Hence, this

39

methodology is not recommended for the backcalculation of the modulus of the granular bases
(Khazanovich et al 2001).
2.6.2.2 NUS-BACK3
NUS-BACK3 is backcalculation software used to determine the layer moduli of rigid pavements
(Shuo et al 1997). The method is based on a set of Equations that are based on the following
assumptions:


Infinite slab



Presence of a base or subbase layer in between the concrete slab and the subgrade.



The base/subbase and subgrade are elastic layers.

Equations 2.27 through 2.30, which are based on the work of (Burmister 1945) and (Panc 1975)
are used for the backcalculation of layer moduli using measured pavement surface deflection
data.

di 

2(1  b ) P
FE
aEb

r  a 
J 0  t  J1  t 
x
2l
 l   l  dt
FE 
a 
t 1 t3
0





(1  b )E s
c
(1  s )E b


40

Equation 2.27

Equation 2.28

Equation 2.29

 Ec hc3 (1  b2 ) 
l 
 6(1   2 ) E 

c
b 

Where,

(1 / 3)

Equation 2.30

di = deflection at sensor location I (in)
 b = Poisson’s ratio of base
P = load applied (lbs)




a = radius of FWD plate (in)

Eb = modulus of base (psi)



FE



l = radius of relative stiffness (in)



= deflection factor

J 0 = Bessel function of first kind of order zero

J1 = Bessel function of first kind of order one
t = dummy variable

ri = radial distance i of the deflection sensor i from the center of the load (in)
 s = Poisson’s ratio of subgrade
E s = modulus of subgrade (psi)





E c = modulus of the PCC slab (psi)



hc

= thickness of the PCC slab (in)

 A minimum of three deflection values are required to backcalculate the modulus values of the


three layers. Typically pavement surface deflections measured at radial distances of 0, 12 and
24in from the center of the load are used in the backcalculation (Setiadji et al 2006).

41

2.6.2.3 ILLI-BACK
ILLI-BACK is a closed form backcalculation procedure based on the principles of dimension
analysis and is applicable to two layer rigid pavement systems. The backcalculation method is
based on the following two fundamental concepts:
1. For any particular loading plate and deflection sensor arrangement, there exist a unique
relationship between the deflection basin area, AREA, and the radius of relative stiffness,
l, of the slab-subgrade system (Ioannides 1990).
2. The deflections of a concrete slab placed on subgrade, are dependent on the
dimensionless load size ratio (a/l) which is defined as the ratio of the plate radius (a) and
the radius of relative stiffness of the concrete slab (l) (Ioannides 1987).
The backcalculation procedure involves the calculation of the area of the deflection basin,
AREA, and the radius of relative stiffness. Based on the value of l, dimensionless deflection
values are calculated. The modulus values of the concrete slab and subgrade are then calculated
using the dimensionless deflections and the radius of relative stiffness (Ioannides 1994)
2.6.3 Forwardcalculation
Most of the backcalculated programs use a forward calculation program where the pavement
deflections at various distances from the load are calculated based on assumed sets of resilient
modulus values and Poisson’s ratios. The calculated deflection basins are then compared to the
measured ones and the assumed layer modulus values are changed incrementally and a new set
of deflection basins are calculated. The iteration process continues until the differences between
the calculated and the measured deflection basins meet certain input conversion criteria. A
serious disadvantage of this method is that, an error in one of the backcalculated layer modulus
leads to errors in the other backcalculated layer moduli.

42

In order to overcome the disadvantage with the iterative backcalculation programs, another
empirical approach for the calculation of the flexible and rigid pavement layer moduli was
developed (Stubstad et al 2006). The approach is called forward calculation and it involves
estimating the modulus of the pavement layer moduli by using the following steps:
Step 1: Estimation of the modulus of the subgrade
The modulus of the subgrade is estimated using Equations 2.31 (the Hogg model (Hogg A.H.A
1944)), which is based on the hypothetical two-layer system with a thin elastic plate resting on
elastic foundation). Implementation of Hogg modulus is described by (Wiseman et al 1983),
which simplifies the multi layer system into a simple two-layer model for the following three
cases:
Case 1 – The subgrade is assumed as an infinite elastic solid foundation.
Case 2 – The subgrade is assumed as a finite elastic solid foundation, with Poisson’s ratio of 0.4.
Case 3 – The subgrade is assumed as a finite elastic solid foundation, with Poisson’s ratio of 0.5
For the three cases the thickness of the foundation is 10 times the characteristic length, lc,
estimated from Equation 2.33. The values that each constant takes depend on case of the Hogg
model used for determining subgrade model. Case 2 Hogg model was used in the LTPP study
(Stubstad et al 2006).

Es  I

1  0 3  40   S0  P 
 
 l 

21  0 
 S  0 c 

Equation 2.31

1/ 

r50  r

1/ 
1 
  0

 r

B
1/ 


1  B



43

Equation 2.32

lc  y0



r50
2
  y 0 r50   4mar50
2



1/ 2

; if

a
 0.2, l c   y o  0.2m r50
lc
Equation 2.33

a

a
 S0 
S 
   1  m  0.2 ; if  0.2,  o   1.0
l

lc
S
S
c

Where, Es = Subgrade modulus under FWD load (psi)

0

= Poisson’s ratio for subgrade material

S0 = theoretical point load stiffness (psi)
S = pavement stiffness (psi) = P/ 0




P = applied FWD load (lbs)

0 = deflection at center of the load (in)


r = deflection at a distance r from the center of the load (in)





r = distance from the center of the load (in)



0
r50 = offset distance (in) where,   0.5
r

lc = characteristic length (in)



h = thickness of subgrade above apparent hard layer (in)

I = influence factor

,,B = curve-fitting coefficients



44

Equation 2.34

y 0,m = characteristic length coefficient
m = stiffness ratio coefficient
Step 2: Estimation of the modulus of the surface layer

  both flexible and rigid pavement, the modulus of the surface layer is estimated from the
For
composite modulus of the entire pavement and the AREA factor.
The composite modulus of the entire pavement is given by:

E0  (1.5* a*  0 )/0

Equation 2.35

Where, E 0 = composite modulus of the entire pavement system

a = radius of the load plate




 0 = pressure due to the impact load

0 = deflection measured at the center of the load

 Rigid Pavements - For rigid pavements, the area of the deflection basin of the first 6 sensors,


denoted by AREA36, is used to determine the AREA factor. The following equations could be
used to estimate the modulus of the concrete slab.


        
AREA36  61  2 12   2 24    36 
     
 0   0   0 


Equation 2.36

1.79

AFpcc =

k2 -1
k2 -

Eo AFpcc k3

Epcc =

Equation 2.37

k1
1
AFpcc

Equation 2.38

k2.38
3
45

Where, AREA36 = AREA beneath first 36 in of deflection basin (in)

0 = deflection measured at the center of load (in)

 12


= deflection measured at 1ft from the center of load (in)

24 = deflection measured at 2ft from the center of load (in)

36 = deflection measured at 3ft from the center of load (in)



AFpcc = AREA factor for PCC layer
k1 = 11.04
k2 = 3.262
Epcc = modulus of the PCC layer (psi)
Eo = composite modulus (psi)
k3 = thickness ratio of surface layer (h1) to plate diameter = h1/(2*a)
a = plate radius
Flexible Pavements - For flexible pavements, which generally have a steeper deflection basin
compared to the rigid pavements, area of the deflection basin under the first 3 sensors, denoted
by AREA12, is used to calculate the AREA Factor. The following equations could be used to
estimate the modulus of the HMA layer:


     
AREA12  22  3 8    12 
    
 0   0 


46

Equation 2.39

1.35

AFac =

Eac =

k2 -1
k2 -

Equation 2.40

k1

Eo AFpcc k3

1
AFac

k2
3

Equation 2.41

Where, AREA12 = AREA beneath first 12 inches of deflection basin (in)

0 = deflection measured at the center of load (in)
 8 = deflection measured 8 in from center of load (in)



 12

= deflection measured at 1ft from center of load (in)

AFac = AREA factor for AC modulus
k1 = 6.85
k2 = 1.752
Epcc = modulus of the PCC layer (psi)
Eac = modulus of the AC layer (psi)
Eo = composite modulus (psi)
k3 = thickness ratio of surface layer (h1) to load – plate diameter = h1/(2*a)
a = plate radius
Step 3: Modulus of the base layer
In order to determine the modulus of an intermediate layer, such as base layer, one must assume

47

that the modulus of the subgrade and that of the surface layer (the PCC slab or the asphalt layer)
determined from the earlier steps to be correct. The base layer modulus is then estimated using
the relationships developed by (Khazanovich et al 2001), which are based on estimating the PCC
and base layer moduli from the composite PCC modulus using the modular ratio (see Equation
2.26) or the Dorman and Metcalf method (Stubstad et al 2006), where the modulus of the base
layer is estimated as a function of the thickness of the base layer and the modulus of the
subgrade.
Pavement layer moduli estimated using forward calculation produced a relatively less scatter
than that from the backcalculation techniques (Stubstad et al 2006).The advantage of forward
calculation is that the modulus of subgrade and the surface layers are determined independently
and have a unique solution for each deflection basin. However, in determining the base layer
modulus, which is dependent on the modulus of the surface layer and that of the subgrade, errors
in the two modulus values may cause significant error in the base modulus. Hence, this approach
suffers the same drawback as the backcalculation.
2.7 COMPARISON OF LABORATORY AND BACKCALCULATED GRANULAR
LAYER MODULI
Several researchers have studied the relationship between the backcalculated and the laboratory
measured modulus values of the base layers. For example, the laboratory measured granular base
layer moduli in the states of Washington and Nevada were found to be greater than the
backcalculated moduli by an average of 28% (Newcomb et al 1989). The deflections measured
by the FWD were not sensitive to the presence of a granular layer unless its thickness was 1.5
times the thickness of the surface layer. Seasonal variations in deflections showed more impact
on the granular bases than on the subgrade layer. On the contrary, in a study conducted on the

48

instrumented test sections in Texas, the laboratory measured modulus values of the granular
layer were found to be consistently lower than the backcalculated values (Akram et al 1994).
Since the stress conditions of the base layer vary from top to bottom; the laboratory modulus was
computed at various stress levels. For the lower half of the base layer, the backcalculated and the
laboratory measured modulus values of the granular layer were found to be in good agreement.
Further, (seeds et al 2000) reported that the backcalculated granular layer modulus values were at
least two to three times higher than the laboratory obtained values. They concluded that the
backcalculated layer modulus values are reasonable, while the laboratory ones are low. (Nazarian
et al 1998) reported that a unique relationship between the laboratory and the backcalculated
modulus values could not be established from tests conducted on the pavement sections across
Texas. The ratio between the two values varied from 40 to 90 percent. They added that
aggregate samples obtained from the pavement sections and virgin samples from the same quarry
did not exhibit the same properties (Nazarian et al 1998). Finally, (Zhou 2000) reported that the
differences between the backcalculated and the laboratory obtained modulus values were
negligible for granular materials under the flexible pavement sections tested in Oregon. The
backcalculated modulus values showed stress dependency similar to that observed in the
laboratory. That is the modulus value increases as the bulk stress increases.
Finally, the resilient modulus of the granular layer is found to be sensitive to the type of
aggregates and not much sensitive to their gradation and moisture content (Heydinger 1996).
Natural gravel was found to have higher modulus than that of limestone and slag. Even though
the modulus value was found to be insensitive to the gradation type, the open graded limestone
had higher modulus values than the dense graded ones.

49

Table 2.9 Backcalculation programs (Dawson 2008)
Program
name

Develop By

Forward
calculation
method

BISDEF

A. Bush
USACEWES

Multi-Layer
elastic theory

BOUSEDEF

Zhou, et al.

CHEVDEF

Backcalculation
subroutine

Nonlinear
analysis

BISAR

ITERATIVE

Nonlinear
analysis

Required

Equivalent layer
thickness

MET

ITERATIVE

Yes

Required

A. Bush
USACEWES

Multi-Layer
elastic theory

CHEVRON

ITERATIVE

COMDEF

M Anderson

Multi-Layer
elastic theory

DELTA

DATA BASE

DBCONPAS

M. Tia, et al.

Finite element

FEACONSIII

DATA BASE

Yes

ELMOD

P. Ulditz

Equivalent layer
thickness

MET

ITERATIVE

Yes
roadbed
only

ELSDEF

Texas A&M
University

Multi-Layer
elastic theory

ELSYM5

ITERATIVE

No

Multi-Layer
elastic theory

CHEVRON

ITERATIVE

Yes
roadbed
only

EMOD

Forward
calculation
subroutine

50

Nonlinear
analysis
Nonlinear
analysis

Seed
modulus

Comments
Sensitive to seed
modulus. Uses
gradient search
method
Program logic
similar to BISDEF

Required

Sensitive to seed
modulus.

Required

For composite
pavements only.

For rigid pavements
only.
Fast, but has
Not
limitation inherent to
required
MET program
Sensitive to seed
Required
modulus.
Required

Table 2.9 (cont’d)
Program
name

Develop By

Forward
calculation
method

Forward
calculation
subroutine

EVERCALC

Mahoney, J.,
et al.

Multi-Layer
elastic theory

CHEVRON

ITERATIVE

Yes

FPEDDI

W. Uddin

Multi-Layer
elastic theory

BASNIF

ITERATIVE

Yes

ISSEM4

P. Ulidtz

Multi-Layer
elastic theory

ELSYM5

ITERATIVE

Yes

Required

MICHBACK

Michigan
State
University

Multi-Layer
elastic theory

CHEVRON

ITERATIVE

No

Required

MODOMP2

L. Irvin

Multi-Layer
elastic theory

CHEVRON

ITERATIVE

Yes

Required

More oriented for
research work.

MODULUS

J. Uzan

Multi-Layer
elastic theory

WESLEA

DATA BASE

Yes

Required

Used in an expert
system frame work.

PADAL

S. F. Brown

Finite element

ITERATIVE

Yes

Required

RPEDDI

W. Uddin

Multi-Layer
elastic theory

ITERATIVE

Yes

Not
required

Backcalculation
subroutine

BASINR

51

Nonlinear
analysis

Seed
modulus
Not
required
for up to
3 layers
Not
required

Comments

Primarily for
flexible pavements.

Uses deflections at
five point to
calculate moduli for
three layers.

For rigid pavements
only.

CHAPTER 3
LABORATORY AND FIELD INVESTIGATION
3.1 INTRODUCTION
The laboratory and field investigations consisted of the following steps:


Partitioning the State of Michigan to various clusters and areas according to the type of
the roadbed soils. This step was accomplished during a previous study to determine the
values of the resilient modulus and the modulus of subgrade reaction of the roadbed soils.



Conducting new FWD tests at specific locations where deflection data were not available
in the MDOT files.



Obtaining all existing and available deflection data files from MDOT.



Conducting laboratory cyclic load triaxial tests of granular layers at various moisture
contents, gradation and compaction. All tests were conducted at Michigan Technological
University (MTU) and the test results were used in this study to compare the
backcalculated and the laboratory measured modulus values.

3.2 PARTITIONING THE STATE OF MICHIGAN
During a previous study sponsored by MDOT, the State of Michigan was partitioned into fifteen
clusters and ninety nine areas based on the types of roadbed soils and their engineering and
physical characteristics. Details of the clusters and areas can be found in (Sessions 2008).

3.3 LABORATORY TEST
During the pavement design process, the required unbound material input parameters for the
1993 AASHTO empirical design method are the resilient modulus values and the corresponding
layer coefficients. Whereas, the required unbound material input parameters for the M-E PDG
52

are the resilient modulus and Poisson’s ratio. The latter two parameters are used in the pavement
response model to quantify the stress dependent stiffness of the materials (including the roadbed
soils and shallow bedrock) under moving wheel loads. The resilient modulus is defined as the
ratio of the repeated deviatoric stress (the difference between the axial and the radial stresses) to
the recoverable axial strain as stated in Equation 3.1 and illustrated in Figure 3.1. In the
laboratory, the resilient modulus is typically obtained using triaxial cell and a hydraulic system
to generate the cyclic load.

MR 

1  3 d

R
R

Equation 3.1

Where, MR = resilient modulus (psi)
ζd = deviator stress (psi)



ζ1 = axial normal stress (psi)
ζ3 = confining pressure (lateral stress), (psi)

εR = recoverable axial strain (inch/inch)
In general, unbound materials display stress-dependent behavior, the value of the resilient
modulus is dependent on the magnitude of the applied axial and lateral stresses. However, at low
stress levels, the resilient modulus of the unbound materials is almost constant.
Due to budget constraints, cyclic load triaxial tests were not conducted as a part of this research
study. However, for comparison purposes, results of laboratory cyclic load triaxial tests that
were conducted by MTU on four granular materials used in the pavement construction in
Michigan were obtained and used. The four unbound granular materials are crushed concrete,
natural gravel, slag, and dolomite. For each material, three different grades were used by MTU,

53

4G-lower bound, 4G-upper bound, and 4G-maximum density. All samples were tested at four
different moisture conditions, as compacted, drying curve, wetting curve, and fully saturated.
Table 3.1 presents a summary of the cyclic load triaxial tests that were conducted by MTU.

Deformation of the soil sample (axial strain)
Figure 3.1 Stress-deformation loop (hysteresis loop) showing the deviatoric stress, and the
resilient and plastic strains

Maximum
Density
Gradation

Upper
Bound
Gradation

Lower
Bound
Gradation

Table 3.1 Summary of tests conducted by MTU (Mayrberger et al, 2007)

As Compacted MC
Wetting Curve MC
Drying Curve MC
Fully Saturated
As Compacted MC
Wetting Curve MC
Drying Curve MC
Fully Saturated
As Compacted MC
Wetting Curve MC
Drying Curve MC
Fully Saturated

Natural
Gravel
X
X
X
X
X
X
X
X
X
X
X
X

54

Dolomite

Slag

X
X
X
X
X
X
X
X
X
X
X
X

X
X
X
X
X
X
X
X
X
X
X
X

Crushed
Stone
X
X
X
X
X
X
X
X
X
X
X
X

A summary of the MTU results and findings are included in chapter 2 (literature review). The
detailed report can be found at (Mayrberger et al 2007). The resilient modulus values obtained
from the laboratory cyclic load tri-axial tests were compared to those obtained through the
backcalculation of the FWD data. Results of the comparison are presented in Chapter 4 of this
thesis.
3.4 FIELD FWD TESTS
The required input parameters to the M-E PDG include the resilient modulus of the unbound
granular layers. Cyclic load triaxial tests could be conducted in the laboratory to determine the
resilient modulus of the unbound materials under different stress state and moisture contents.
Such tests are laborious, time consuming, and expensive. The alternative is to conduct
nondestructive deflection tests (NDTs), measure the pavement surface deflections due to a given
load level and use the deflection data to backcalculate the pavement layer moduli. NDTs and
backcalculation of layer moduli procedures are quicker, require less time and cheaper. In
addition, the NDTs are conducted under in-situ condition and could cover the entire pavement
network. Nevertheless, the M-E PDG accepts the laboratory determined and the backcalculated
modulus as inputs for design level 1. In this study, all NDTs were conducted by MDOT using a
KUAB FWD. In each test, 9000 pound load was delivered to the pavement surface and the
resulting pavement surface deflections were measured at radial distances of 0, 8, 12, 18, 24, 36,
and 60 inches from the center of the load. For rigid pavements, the FWD tests are generally
conducted at mid slabs. However, in order to reduce the cost of traffic control and minimize
traffic disruption, some NDTs were conducted on the pavement shoulder where the shoulder had
the same cross section as that of the pavement.
Nevertheless, over the last 20 years period MDOT has been conducting NDTs along the entire

55

pavement network. The tests were conducted on all roadways types (Interstate (I), United States
(US), and Michigan (M)). Hence, when requested the NDT data files, five hundred and five
FWD data files (each file references the locations of various NDTs along one road segment)
were received from MDOT. All files were examined and separated into two pools. One pool
includes all FWD data files where the date of the test or the test location reference is missing or
data regarding the pavement type and cross-section at the time of the FWD tests were not found
in the MDOT project files. This pool was eliminated from any further analyses. The second pool
of FWD data files consists of the remaining one hundred and one FWD data files containing six
thousand two hundred and forty six FWD tests. This pool of data files was included in the
analysis. In addition, the research team requested from MDOT to conduct additional FWD tests
to populate certain regions along the roadways where the number of available FWD tests was
low. Data from the new FWD tests were also included in this pool of FWD data files. The
locations of these new FWD tests are listed in (Dawson 2008) and are shown in Figure 3.6.
In the next step, results of each FWD test were checked visually and the shape of the deflection
basin was examined. Test data where the shape of the deflection basin was irregular were
eliminated from further considerations. Examples of regular and irregular deflection basins are
presented in Figures 3.2 and 3.3. After eliminating the irregular deflection basins, seven
thousand three hundred and sixty eight deflection basins were used in this study to backcalculate
the pavement layer moduli. The files are spread across the entire pavement network of Michigan
covering all types of pavement (flexible and rigid) and the roadways (Interstate (I), United States
(US), and Michigan (M)). The number of files and tests for each roadway and the region for both
rigid and flexible pavements are listed in Tables 3.2 and 3.3. It should be noted that the term
“files” refers to a pavement section where various FWD tests were conducted, whereas the term

56

“test” refers to one FWD test. Each FWD test consists of four drops, the first drop is used for
pavement seating (no data are collected), the data from the other three drops are collected,
averaged and used in the backcalculation.
In addition to the pavement cross-section data, the type and gradation of the aggregates used in
the unbound granular layer are provided by MDOT. The aggregate types include natural gravel,
dolomite, and crushed concrete and are both open and dense graded. Figures 3.4 and 3.5 show
the distribution of the aggregate types number of FWD tests, for each aggregate type, conducted
on both flexible and rigid pavements. Note that pavement sections containing a layer of crushed
asphalt and granular layer made up of natural gravel are labeled crushed asphalt – natural gravel
and crushed asphalt – aggregate base for sections where the aggregate type is not known.

Radial Distance (in)
0

15

30

45

Deflection (mills)

0
2
4
6

8
10
Figure 3.2 Examples of regular deflection basins

57

60

Radial Distance (in)
0

15

30

45

60

Deflection (mills)

0
1
2
3
4
5
Figure 3.3 Examples of irregular deflection basins
The deflection data from these FWD files and test was used to determine the following:


Backcalculate the moduli of the unbound granular layers



Variation of the unbound granular layer moduli across the state



Study the effect of the material used on the unbound granular layer moduli

The results of these analyses are presented and discussed in chapter 4.

58

Table 3.2: Number of files and tests conducted on the rigid pavement
Region

Road Designation

59

No. of. Tests

4
4
2
8
2
1
21
2
1
4
1
8
2
1
8
1
12
6
1
4
3
5
13
5
3
8
3
2
1
6

I-675
I-75
US-127
Bay
US-23
I-475
US-10
Total
US - 131
I-96
Grand
M-6
US-27
Total
I-69
I-75
Metro
I-94
M-5
Total
North
I-75
I-196
I-69
Southwest I-94
US-31
Total
I-75
Superior M-28
Total
I-69
I-75
University
US-23
Total

Files

259
159
45
290
125
5
883
31
21
1534
37
1623
54
5
589
69
717
354
33
115
162
162
472
189
143
332
125
78
79
282

Table 3.3: Number of files and tests conducted on the flexible pavement

Region

Road Designation

60

No. of. Tests

5
6
11
2
1
1
6
7
17
1
6
7
6
1
1
4
12
1
2
1
1
2
1
8
1

M-57
Bay
M-88
Total
M-120
M-20
M-37
Grand
M-57
US-131
Total
I-94
Metro
M-53
Total
I-75
M-55
North
US-131
US-23
Total
I-75
M-28
M-38
Superior US-141
US-2
US-41
Total
University M-52

Files

400
188
588
148
68
40
404
434
1094
29
75
104
573
76
93
44
786
11
21
11
13
22
11
89
44

Total Number
of Tests = 2705

26.7%

50.8%

14.2%
8.4%
Crushed Asphalt - Natural Gravel
Crushed Asphalt - Aggregate Base
Natural Gravel - Dense Gradation
Unknown
Figure 3.4 Distribution of base types in flexible pavements where FWD tests were conducted

Total Number
of Tests = 4663

29.5%

53.5%
0.2%
0.2%
10.3%
6.4%
Crushed Concrete - Dense Gradation
Dolomite - Dense Gradation
Dolomite - Open Gradation
Natural Gravel - Dense Gradation
Natural Gravel - Open Gradation
Unknown

Figure 3.5 Distribution of base types in rigid pavements where FWD tests were conducted

61

Previous FWD test locations
New FWD test locations
Requested FWD test locations

Figure 3.6 FWD test locations in the State of Michigan

62

Previous FWD test locations
New FWD test locations
Requested FWD test locations

Figure 3.6 (cont’d)

63

Previous FWD test locations
New FWD test locations

Requested FWD test locations

Figure 3.6 (cont’d)

64

New FWD test locations
Previous FWD test locations

Requested FWD test locations

Figure 3.6 (cont’d)

65

CHAPTER 4
DATA ANALYSIS
4.1 INTRODUCTION
Deflection data obtained from the Michigan Department of Transportation (MDOT) falling
weight deflectometer (FWD) files were used to backcalculate the resilient moduli of the unbound
granular layer supporting both flexible and rigid pavements. Data obtained from FWD tests
conducted on rigid pavements were used in the backcalculation procedure assuming a two layer
pavement system (Portland cement concrete (PCC) and granular layer). On the other hand, data
obtained from FWD tests conducted on flexible pavements were used in the backcalculation
procedure assuming both two and three layer systems (asphalt concrete and granular layers and
roadbed soils or asphalt concrete, base, and subbase layers and roadbed soils).
The backcalculated resilient modulus values of the pavement layers were then divided into three
groups; two groups for flexible and one for rigid pavements as stated below.


Group 1 - The backcalculated resilient modulus values for flexible pavements that were
obtained using two layered system (the moduli of the asphalt and granular layers and the
roadbed soils).



Group 2 - The backcalculated resilient modulus values for flexible pavements that were
obtained using three layered system (the moduli of the asphalt, aggregate base, and sand
subbase layers and the roadbed soils).



Group 3 - The backcalculated resilient modulus values for rigid pavements that were
obtained using two layered system (the moduli of the concrete slab, the granular layer,
and the roadbed soils).

For each of the three groups of resilient modulus values, the data were classified according to the

66

following four cases for analysis:


Case 1 - All backcalculated resilient modulus values.



Case 2 - All backcalculated resilient modulus values except the upper and lower ten
percent, which were considered outliers.



Case 3 - All backcalculated resilient modulus values except the upper and lower twenty
percent, which were considered outliers.



th

Case 4 - All backcalculated resilient modulus values less than the 75 percentile.

For each of the three groups of data and for each of the four cases, the data were divided into
different categories based on three variables; pavement type, aggregate type and aggregate
gradation. To statistically assess the impact of each variable on the backcalculated resilient
modulus values, t-tests at the 95% confidence interval were conducted on the means of all data
categories. The results are presented and discussed in this chapter.
Finally, the relationships between the resilient modulus values that were determined in the
laboratories of Michigan Technological University (MTU) and the backcalculated resilient
modulus values of several aggregate and gradation types were investigated. The results are also
presented and discussed in this chapter.

4.2 DEFLECTION DATA
As stated in Chapter 3, five hundred and five FWD data files were obtained from MDOT. Each
file contained the results (the deflection data) of many tests that were conducted along a
particular pavement section over the last 20 years period. Upon receiving the files, they were
examined and separated into two pools. One pool (pool1) includes all FWD data files where the
date of the test or the test location reference is missing or data regarding the pavement type and
cross-section at the time of the FWD tests were not found in the MDOT project files. This pool
67

was eliminated from any further analyses. The second pool (pool 2) of FWD data files consists
of the remaining one hundred and one (101) FWD data files containing six thousand two
hundred and forty six (6246) FWD tests. This pool of data files was included in the analysis. In
addition, the research team requested MDOT to conduct additional FWD tests to populate certain
regions along the roadways where the number of available FWD tests was low. Data from the
new FWD tests were also included in this pool (pool2) of FWD data files. The locations of these
new FWD tests are listed in Dawson (Dawson 2008) and are shown in Figure 3.7 of Chapter 3.
The deflection data in all FWD tests of pool2 were plotted against the radial distance from the
center of the load. The resulting deflection basins were examined. The FWD test files where the
deflection basins were irregular were also eliminated from further analyses. Summary of the tests
used in the analyses is presented in Table 4.1. Table 4.2 shows a summary of the FWD test
reference location, the MDOT Region, the road designation, the control section and job number,
the pavement layer thicknesses, the aggregate type and gradation, and the roadbed soil type for
tests conducted on rigid pavement. A similar summary for the FWD tests on flexible pavements
is presented in Table 4.3.
Table 4.1 Distribution of FWD files and tests

MDOT region
Bay
Grand
Metro
North
Southwest
Superior
University
Total

Rigid pavement
FWD
FWD
Files
Tests
21
883
8
1623
12
717
6
354
13
472
8
332
6
282
74
4663

Flexible pavement
FWD
FWD
Files
Tests
11
588
17
1094
7
104
12
786
0
0
8
89
1
44
56
2705

68

Total
FWD
Files
32
25
19
18
13
16
7
130

FWD
Tests
1471
2717
821
1140
472
421
326
7368

Table 4.2 A summary of the FWD files for rigid pavement
FWD File Details
Control
Section

Gradation

PCC
Slab

Granular

No.
of.
Tests

NA
NA
NA
NA
NA
NA
NA
NA

NA
NA
NA
NA
NA
NA
NA
NA

9
9
9
9
9
9
9
7.3

20
20
20
20
20
20
20
35.4

72
49
75
63
47
19
57
5

SC

NA

NA

9

20

33

rigid-B-US127-CS37014-12-19-2007

SC

NA

NA

8

24.3

12

rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005(2)
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-08-23-2005(2)
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-24-2001

SP2
SM
SP2
SP2

NA
NA
NA
NA

NA
NA
NA
NA

10
10
10
10

20
20
20
20

19
27
68
31

SP2

NA

NA

10

20

48

SM
SM

NA
NA

NA
NA

9
9

20
20

34
46

SM

NA

NA

9

20

17

SM
SM

NA
NA

NA
NA

9
9

20
20

60
65

Material

SC
SC
SC
SC
SC
SC
SC-SM
SC

rigid-B-US127-CS29011-06-27-2008

37014
25031
25031
25031
25031

Road

Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay

73101
73101
73101
73101
73101
73101
6111
9101

rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-12-05-2005
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-11-30-1999
rigid-B-I75-CS6111-09-13-2001
rigid-B-US10-CS9101-12-18-2007

29011

Bay
Bay
Bay
Bay

I-675
I-675
I-675
I-675
I-75
I-75
I-75
US-10
US127
US127
US-23
US-23
US-23
US-23

Bay

US-23

25031

Bay
Bay

US-23
US-23

25031
25031

Bay

US-23

25031

Bay
Bay

I-475
I-475

25132
25132

Bay

Granular Layer

Roadbed

Region

Bay

Pavement Layer
Thickness (in)

Material
File Name

69

Table 4.2 ( ont’d)
FWD File Details
Region
Grand
Grand

Road
US131
US131

Control
Section

Pavement Layer
Thickness (in)

Material

Gradation

PCC
Slab

Granular

No.
of.
Tests

Dolomite

Dense

9

24

9

NA

NA

9

24

22

Dense

9

24

21

Dense

10

24

57

Dense

10

24

653

Dense

10

24

665

NA
NA

10
10

24
24

159
37

Open

10

20

18

NA
NA
NA
NA
NA
NA
NA
NA

12
12
10
10
10
10
10
10

16
20
20
14
14
14
14
14

36
5
333
35
20
30
36
69

Granular Layer

Roadbed

Material

SC-SM

File Name

41131

rigid-G-US131-CS41131-07-111996-(2)

59012

rigid-G-US131-CS59012-04-09-1998

SP1

Grand

I-96

34044

rigid-G-I96-CS34044-06-27-2001

SM

Grand

M-6

41064

rigid-G-M6-CS41064-09-15-2004

SC-SM

Grand

M-6

41064

rigid-G-M6-CS41064-09-29-2004

SC-SM

Grand

M-6

41064

rigid-G-M6-CS41064-09-08-2004

SC-SM

Grand
Grand

M-6
US-27

41064
19033

rigid-G-M6-CS41064-11-15-2001
rigid-G-US27-CS19033-06-15-1998

SC-SM
SC-SM

Metro

I-69

77023

rigid-M-I69-CS77023-07-02-1997

CL

Metro
Metro
Metro
Metro
Metro
Metro
Metro
Metro

I-69
I-75
I-94
I-94
I-94
I-94
I-94
I-94

77024
82194
82021
82022
82022
82022
82022
82022

rigid-M-I69-CS77024-04-02-2008
rigid-M-I75-CS82194-09-16-2008
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82022-10-06-2005
rigid-M-I94-CS82022-10-13-2005
rigid-M-I94-CS82022-10-26-2005
rigid-M-I94-CS82022-10-31-2005
rigid-M-I94-CS82022-09-30-2005

CL
SC
SP2
SC
SC
SC
SC
SC

70

Natural
Gravel
Crushed
Concrete
Crushed
Concrete
Crushed
Concrete
NA
NA
Natural
Gravel
NA
NA
NA
NA
NA
NA
NA
NA

Table 4.2 ( ont’d)
FWD File Details

Pavement Layer
Thickness (in)

Material

Region

Road

Control
Section

Roadbed

Metro
Metro
Metro

I-94
I-94
M-5

82022
82022
00000

rigid-M-I94-CS82022-11-01-2005
rigid-M-I94-CS82022-09-16-2008
rigid-M-M5-CS00000-11-29-2006

SC
SC
SC

North

I-75

65041

rigid-N-I75-CS65041-08-30-2001

SP2

North

I-75

65041

rigid-N-I75-CS65041-09-14-2001

SP2

North

I-75

16091

rigid-N-I75-CS16091-09-17-2001

SP1

North

I-75

16092

rigid-N-I75-CS16092-09-18-2001

SP1

North

I-75

16092

rigid-N-I75-CS16092-09-27-2001

SP1

North
Southwe
st
Southwe
st
Southwe
st
Southwe
st
Southwe
st

I-75

16091

rigid-N-I75-CS16091-10-26-2001

I-196

3033

I-69

Granular Layer

Granular

No.
of.
Tests

Material

Gradation

PCC
Slab

NA
NA
NA

9
12.5
12

12
16
20

43
11
69

Dense

9

14

20

Dense

9

14

29

Dense

9

14

68

Dense

9

14

98

Dense

9

14

86

SP1

NA
NA
NA
Natural
Gravel
Natural
Gravel
Natural
Gravel
Natural
Gravel
Natural
Gravel
NA

NA

9

14

53

rigid-So-I196-CS3033-05-14-2008

SP-SM

NA

NA

9

20

33

12034

rigid-So-I69-CS12034-10-08-1998

SC-SM

Dense

9

20

7

I-69

12034

rigid-So-I69-CS12034-10-09-1998

SC-SM

Dense

9

20

7

I-69

12034

rigid-So-I69-CS12034-09-11-2001

SC-SM

Open

9

20

36

I-69

12033

rigid-So-I69-CS12033-12-18-2001

SC-SM

NA

9

20

65

File Name

71

Natural
Gravel
Natural
Gravel
Natural
Gravel
NA

Table 4.2 ( ont’d)
FWD File Details
Region
Southwe
st
Southwe
st
Southwe
st
Southwe
st
Southwe
st
Southwe
st
Southwe
st
Southwe
st
Superior
Superior
Superior
Superior
Superior
Superior

Pavement Layer
Thickness (in)

Material

Gradation

PCC
Slab

Granular

No.
of.
Tests

NA

NA

9

20

84

SP-SM

NA

NA

9

14

66

rigid-So-I94-CS11081-10-30-2001

SP-SM

NA

NA

9

14

12

11057

rigid-So-US31-CS11057-10-09-2001

SP-SM

Open

9

14

28

US-31

11057

rigid-So-US31-CS11057-10-30-2001

SP-SM

Open

9

14

27

US-31

11057

rigid-So-US31-CS11057-06-06-2003

SP-SM

Open

9

14

16

US-31

11057

rigid-So-US31-CS11057-10-10-2002

SP-SM

Open

9

14

58

US-31

11057

rigid-So-US31-CS11057-05-14-2008

SP-SM

NA

NA

9

14

33

I-75
I-75
I-75
I-75
I-75

49025
49025
17033
17034
17034

rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-22-2000

SC
SC
SP1
SP1
SP1

NA
NA
NA
NA
NA

9
9
9
9
9

22
22
24
48
48

63
40
49
16
21

M-28

2041

rigid-Su-M28-CS02041-08-23-2001

SP-SM

NA
NA
NA
NA
NA
Natural
Gravel

Dense

10

25

21

Road

Control
Section

I-94

11081

I-94

Granular Layer

Roadbed

Material

rigid-So-I94-CS11081-11-18-2002

SP-SM

11081

rigid-So-I94-CS11081-10-28-2004

I-94

11081

US-31

File Name

72

Natural
Gravel
Natural
Gravel
Natural
Gravel
Natural
Gravel

Table 4.2 ( ont’d)
FWD File Details

Pavement Layer
Thickness (in)

Material

Region

Road

Control
Section

Roadbed

Superior

M-28

2041

Superior
Universi
ty
Universi
ty
Universi
ty
Universi
ty
Universi
ty
Universi
ty

M-28

17062

rigid-Su-M28-CS02041-08-23-2001(2)
rigid-Su-M28-CS17062-05-08-2001

I-69

19042

I-69

File Name

Gradation

PCC
Slab

Granular

No.
of.
Tests

Dense

10

25

42

NA

8

24

80

Open

9

14

10

Open

9

14

17

Open

9

14

98

Granular Layer
Material

SP1

Natural
Gravel
NA

rigid-U-I69-CS19042-09-18-1999

SC

Dolomite

19043

rigid-U-I69-CS19043-06-25-2001

SC

I-69

19043

rigid-U-I69-CS19043-05-14-2002

SC

I-75

58151

rigid-U-I75-CS58151-03-31-2008

SC

NA

NA

10

0

57

I-75

58152

rigid-U-I75-CS58152-10-06-2006

SC

NA

NA

10

20

21

US-23

58034

rigid-U-US23-CS58034-09-14-2006

SP-SM

Natural
Gravel

Dense

10

15

79

73

SP-SM

Natural
Gravel
Natural
Gravel

Table 4.3 A summary of the FWD files for flexible pavement
Material Types
FWD File Details
Region

Road

Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay

M-57
M-57
M-57
M-57
M-57
M-84
M-84
M-84
M-84
M-84
M-84
M120
M120
M-20
M-37
M-57
M-57
M-57
M-57

Grand
Grand
Grand
Grand
Grand
Grand
Grand
Grand

Roadbed

Control
Section
29022
29022
29022
29022
29022
9011
9011
9011
9011
9011
9011

flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-10-2005

61012

Granular Layer

Pavement Layer
Thickness (in)

No.
of.
Tests

Material

Gradation

AC

Base

SC
SC
SC
SC
SC
SC
SC
SC
SC
SC
SC

CA-NG
CA-NG
CA-NG
CA-NG
CA-NG
NA
NA
NA
NA
NA
NA

NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA

5.5
5.5
5.5
5.5
5.5
4.0
4.0
4.0
4.0
4.0
4.0

7
7
7
7
7
7
7
7
7
7
7

Subbase
18
18
18
18
18
18
18
18
18
18
18

flex-G-M120-CS61012-07-23-1998

SP1

NA

NA

7

7

18

74

61012

flex-G-M120-CS61012-07-24-1998

SP1

NA

NA

7

7

18

74

54041
62032
41122
59021
59021
59021

flex-G-M20-CS54041-04-09-2002
flex-G-M37-CS62032-05-18-2000
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(3)

SP1
SP1
SP1
SP1
SP1
SP1

NA
NA
CA-NG
CA-NG
CA-NG
CA-NG

NA
NA
NA
NA
NA
NA

6
8
3.0
3
3
3.0

7
7
8
8
8
8

18
18
18
18
18
18

68
40
108
53
53
54

File Name

74

134
66
66
67
67
39
69
32
16
16
16

Table 4.3 ( ont’d)
Material Types
FWD File Details
Region

Road

Grand
Grand

Metro
Metro
Metro
Metro
Metro
Metro

M-57
M-57
US131
US131
US131
US131
US131
US131
US131
I-94
M-53
M-53
M-53
M-53
M-53

Metro

M-53

Grand
Grand
Grand
Grand
Grand
Grand
Grand

Control
File Name
Section
59021 flex-G-M57-CS59021-08-23-1994-(4)
29021 flex-G-M57-CS29021-5-23-1995
54013
54013
54013
54013
54013

flex-G-US131-CS54013-08-18-1994

Roadbed
SP1
SP1
SP1

flex-G-US131-CS54013-08-18-1994(2)
flex-G-US131-CS54013-08-18-1994(3)
flex-G-US131-CS54013-08-18-1994(4)
flex-G-US131-CS54013-08-18-1994(5)

SP1
SP1
SP1
SP1

Granular Layer

Pavement Layer
Thickness (in)

No.
of.
Tests

Material

Gradation

AC

Base

CA-NG
NA
Natural
Gravel
Natural
Gravel
Natural
Gravel
Natural
Gravel
Natural
Gravel

NA
NA

3
3.0

8
8

Subbase
18
18

Dense

7.3

6

18

65

Dense

7.5

6

18

32

Dense

7.5

6

18

65

Dense

7.5

6

18

33

Dense

7.5

6

18

33

53
83

54014

flex-G-US131-CS54014-05-13-1998

SP1

NA

NA

7.3

6

18

181

59012

flex-G-US131-CS59012-06-25-1998

SP1

NA

NA

8

6

18

25

flex-M-I94-CS77111-04-02-2008
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-04-04-2008

CL
CL
CL
CL
CL
CL

NA
NA
NA
NA
NA
NA

NA
NA
NA
NA
NA
NA

4.2
8
8
8
8
8.0

6
6
6
6
6
6

18
18
18
18
18
18

29
13
13
13
13
10

flex-M-M53-CS50015-04-09-2009

CL

NA

NA

8

6

18

13

75

Table 4.3 ( ont’d)
Material Types
FWD File Details
Control
Section
69014
69014
69014
69014
69014
69014

flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-23-1997

M-55
US131
US23
US23
US23
US23

72022

AC

Base

SP1
SP1
SP1
SP1
SP1
SP1

CA-AG
CA-AG
CA-AG
CA-AG
NA
NA

NA
NA
NA
NA
NA
NA

6.25
6.3
6.25
6.3
6.25
6.3

6
6
6
6
6
6

Subbase
18
18
18
18
18
18

flex-N-M55-CS77022-8-20-2001-(2)

SP1

NA

NA

7.0

6

18

76

67017

flex-N-US131-CS67017-05-01-2002

SM

NA

NA

7.25

6

18

93

1052

flex-N-US23-CS1052-06-03-2008

NA

NA

3.5

8

18

11

4032

flex-N-US23-CS4032-06-03-2008

NA

NA

5.0

8

18

11

71073

flex-N-US23-CS71073-06-04-2008

NA

NA

6.5

8

18

11

71073

flex-N-US23-CS71073-06-04-2008(2)

SCSM
SCSM
SCSM
SCSM

NA

NA

5.5

8

18

11

I-75

49025

flex-Su-I75-CS49025-05-22-2008

SC

NA

NA

7.5

6

18

11

M-28

17061

flex-Su-M28-CS17061-05-22-2008

NA

NA

5.0

8

18

10

M-28

75061

flex-Su-M28-CS75061-05-21-2008

NA

NA

5.5

8

18

11

North
North
North
North
North
North

I-75
I-75
I-75
I-75
I-75
I-75

North

North
North
North
Superi
or
Superi
or
Superi
or

No.
of.
Tests

Gradation

Road

North

Pavement Layer
Thickness (in)

Material

Region

North

Roadbed

Granular Layer

File Name

SPSM
SPSM

76

90
90
92
111
97
93

Table 4.3 ( ont’d)
Material Types
FWD File Details
Region
Superi
or
Superi
or
Superi
or
Superi
or
Superi
or
Univer
sity

Road

Control
Section

M-38

66072

flex-Su-M38-CS66042-05-20-2008

US141

7022

US-2

Roadbed

Granular Layer

Pavement Layer
Thickness (in)

No.
of.
Tests

Material

Gradation

AC

Base

Subbase

CL

NA

NA

3.5

8

24

11

flex-Su-US141-CS7022-05-19-2008

ML

NA

NA

4.5

8

18

13

27022

flex-Su-US2-CS27022-05-20-2008

SM

NA

NA

3.5

8

18

11

US-2

75021

flex-Su-US2-CS75021-05-22-2008

SPSM

NA

NA

5.5

8

18

11

US41

7013

flex-Su-US41-CS7013-05-19-2008

ML

NA

NA

2.5

8

18

11

M-52

33051

flex-U-M52-CS33051-11-13-2002

SC

NA

NA

6.0

6

18

44

File Name

77

4.3 PAVEMENT STRUCTURES
In the design and construction of new pavements, two pavement cross-sections are typically used
by MDOT and other State Highway Agencies. These are:


A flexible section consisting of hot-mix asphalt (HMA) surface, aggregate base, and a
sand subbase layer supported on roadbed soil. This cross section could be labeled as a
three layered system (HMA, base, and subbase layers) or two layered system if the
aggregate base and sand subbase are combined as a granular layer.



A rigid section consisting of a PCC slab, optional aggregate base, and a sand subbase
layer supported on roadbed soil. This cross section could also be labeled as a three
layered system (PCC, base, and subbase layers). However, because of the stiffness of the
concrete slab relative to the aggregate base and the high ratio of the thickness of the PCC
slab to that of the aggregate base (typically 2 or more), most existing backcalculation
software combine the aggregate base (if any) and the sand subbase as one granular layers.

In this study, the two layered system was used to backcalculate the resilient modulus of all
flexible and rigid pavement sections. Hence, the base and subbase layers were combined as one
granular layer whose thickness was taken as the sum of the thicknesses of the base and subbase
layers as shown in Figure 4.1. In addition, for each FWD test conducted on flexible pavement
sections, a three layered system was also used and the modulus values of the HMA, base, and
subbase layers and the roadbed soils were backcalculated. The three layered system is also
shown in Figure 4.1.
Few of the flexible pavement sections that were subjected to FWD tests consisted of an HMA
layer, a crushed asphalt under the HMA layer, aggregate base, and sand subbase layer supported
on roadbed soils as shown in Figure 4.2. This pavement structure was likely the result of break

78

and set action and HMA overlay. The crushed HMA was left in place as an additional base layer.
Unfortunately, the exact thickness of the crushed asphalt layer was not recorded, hence its
thickness was assumed to be equal to the thickness of the HMA overlay. In the backcalculation
of the layer moduli of these pavement sections, the thickness of the base layer was considered as
the sum the thicknesses of the crushed asphalt layer and the existing aggregate base as shown in
Figure 4.2. It should be noted that, in this study, pavement sections containing layers of crushed
asphalt and a natural gravel aggregate base are labeled “crushed asphalt – natural gravel (CANG)”. Likewise, the label “crushed asphalt – aggregate base (CA-AG)” was used for sections
where the aggregate base type is not known.

HMA

HMA or PCC

Aggregate base
Granular layer
Sand subbase

Roadbed soil

Roadbed soil

Three layered system

Two layered system

c

Figure 4.1 Pavement structures used for backcalculation

79

HMA overlay

HMA overlay

Crushed HMA

Crushed HMA/
aggregate base

Aggregate base

Sand subbase

Sand subbase

Roadbed soil

Roadbed soil

Actual pavement section

Backcalculated pavement section

Figure 4.2 Pavement cross-sections for flexible pavements with a crushed asphalt layer
4.4 BACKCALCULATION OF UNBOUND GRANULAR LAYER MODULI
The MICHBACK software is a backcalculation program that was developed at Michigan State
University for MDOT. It uses a linear elastic layered system, the Chevronx software as a forward
engine, and a two gradient Newtonian based algorithm in the iteration process to converge the
calculated and the measured deflection basins. The MICHBACK program was used in this study
to backcalculate the pavement layer moduli for both flexible and rigid pavements. The user
inputs to the MICHBACK program for each pavement layer, the thickness (provided by MDOT),
Poisson’s ratios, and the seed modulus and its possible maximum and minimum values.
The default values for Poisson’s ratios and the maximum, minimum, and seed resilient modulus
values included in the software were used for most of the pavement sections. The program
accepts convergence based on the following criteria, set by the user.

80



The difference in each of the backcalculated modulus in two consecutive iterations is
0.02 percent.



The difference in the Root Mean Square (RMS) error between the measured and the
calculated deflection basins in two consecutive iterations is 0.02 percent.

4.4.1 Rigid Pavements
The AREA method is an empirical backcalculation method based on a PCC slab on grade
system. The method is generally used to backcalculate the layer moduli of rigid pavements. The
AREA method backcalculates the composite modulus of the PCC slab, which is a combined
modulus of the PCC slab and the granular layer, and the modulus of the roadbed soils. The
resilient modulus of the unbound granular layer can be estimated from the composite modulus of
the PCC slab using the correlations developed by (Ioannides et al, 1992). Said correlations utilize
the modular ratio β (which is the ratio of the modulus of the base layer to that of the PCC slab,
see Equation 2.26). For any given granular base, the modular ratio is typically very small. This
makes the estimate of the resilient modulus of the base layer highly sensitive to the estimated
modular ratio. Hence, the method is not recommended to be used for estimating the modulus of
the unbound granular layers (smith et al, 1995).
In a study sponsored by the Federal Highway Administration (FHWA), Stubstad et al proposed
an alternative backcalculation method that uses forward calculation (Stubstad et al 2006). The
method involves backcalculation of the roadbed modulus using a modified Hogg model and of
the slab using AREA factor. However, the modulus of the unbound granular layer has to be
determined using the correlations developed by Ioannides et al (Ioannides et al 1992).
To study the impact of the unbound granular layer modulus on the surface deflections of rigid
pavements, the ISLAB2000 software was used to calculate the surface deflection basins for

81

different base thickness and modulus while keeping the other variables constant. The resulting
deflection basins are shown in Figure 4.3. Examination of the figure indicates that, as it was
expected, the presence of an unbound granular layer does not have significant impact on the
deflection basin. Hence, the development of empirical relations to estimate the granular layer
modulus value based on the measured surface deflection is a difficult task.
Radial Distance (in)

0

10

20

30

40

50

60

Deflection (mils)

0
0.5
1
1.5
2
Modulus = 20 ksi; Thickness = 14 in

Modulus = 80 ksi, Thickness = 14 in

Modulus = 20 ksi; Thickenss = 22 in

Modulus = 80 ksi; Thickness = 22 in

Figure 4.3 Impact of unbound granular layer modulus on the rigid pavement deflection basin

As an alternative, analysis of elastic layered system could be performed to backcalculate the
layer moduli of rigid pavements. Indeed, in another study sponsored by FHWA, Von Quintas et
al used the MODCOMP4 software to backcalculate the layer moduli of both rigid and flexible
pavements (Von Quintas et al 2002). They reported that the RMS error between the measured
and the calculated deflection basins was less than 3% for both pavements. They found that
correct estimation of the depth to the stiff layer increases the accuracy of the backcalculated
pavement layer moduli. Based on those findings, the MICHBACK software (which is based on
elastic layered system with Chevronx as the forward engine) was used in this study to

82

backcalculate the layer moduli of both rigid and flexible pavements. The maximum acceptable
RMS error levels were set at 3 percent for rigid pavements and at 2 percent for flexible
pavements.
As mentioned in Table 4.1, a total of seventy four FWD files with four thousand six hundred
sixty three FWD tests conducted on rigid pavements were used in this study. Pavement layer
thicknesses were provided by the MDOT. The depth to stiff layer was estimated and then
modified several times to minimize the RMS error. All tests with an RMS error greater than 3
percent were not included in further analyses. A total of two thousand nine hundred ninety five
(64%) tests have an RMS error of less than 3 percent. The averages of the backcalculated
resilient moduli for each aggregate type and gradation are shown in Figure 4.4. Irrespective of
the unbound granular layer aggregate type, the average backcalculated modulus was found to
vary between 30 and 40 ksi. A sample input (deflection data and layer thicknesses) and output
(backcalculated layer moduli and the backcalculated modulus of the roadbed soil) data for I75 in
North Region is presented in Table 4.4. The averages of backcalculated moduli for concrete
slab, granular layer and the roadbed for all files are listed in Table 4.5. Details of the
backcalculated granular layer modulus values for all tests conducted on rigid pavements are
presented in Appendix A.
The backcalculated PCC resilient modulus results obtained from the MICHBACK software were
compared to those obtained using the AREA method, as shown in Figure 4.5. The results
indicate similarity between the two methods.
Figure 4.6 depicts the averages of the backcalculated modulus values of the granular layer and
the roadbed soils under rigid pavements. It can be seen that the modulus values of the granular
layer are not affected by those of the roadbed soils (no interaction). This observation indicates

83

that the elastic layered analysis embedded in the MICHBACK software could be used to

Average Backcalculated Granular layer
Modulus (ksi)

simulate rigid pavement response to loads.
50
40
30
20
10
0
Crushed Dolomite - Natural
Concrete - Open
Gravel Dense
Dense

Natural
Gravel Open

Unknown

Material Type - Gradation

Average Backcalculated PCC modulus
using MICHBACK (ksi)

Figure 4.4 Unbound granular layer moduli for rigid pavements
6,000

4,000

2,000

0
0

2,000

4,000

6,000

Average Backcalculated PCC Modulus using AREA
Method (ksi)
Figure 4.5 Backcalculated PCC modulus values obtained from the MICHBACK software versus
those from the AREA method

84

Table 4.4 A sample backcalculated file for rigid pavement
Region

Road

Control
Section

Project
Number

FWD
Date

North

I75

65041

947

7/2/1997

Pavement Layer
Thicknesses (in)

Material Type
Roadbed

Aggregate
Gradation
Type

File
Natural
rigid-N-I75-CS65041-09-14-2001
SP2
Name
Gravel
Deflections (mils) measured by FWD at various radial distances (in)
0
8
12
18
24
36
60
8.54
7.13
6.46
5.71
5.00
3.82
2.13
7.36
6.10
5.51
4.80
4.13
3.11
1.65
7.95
6.81
6.30
5.63
5.00
3.94
2.20
8.15
6.97
6.46
5.75
5.04
4.02
2.24
7.56
6.22
5.67
4.92
4.29
3.23
1.73
7.01
5.87
5.31
4.69
4.06
3.07
1.61
6.97
5.83
5.31
4.65
4.06
3.07
1.61
7.56
6.26
5.67
4.92
4.25
3.19
1.65
7.56
6.22
5.63
4.92
4.29
3.23
1.73
8.15
6.73
6.14
5.43
4.76
3.66
2.01
7.72
6.38
5.79
5.04
4.37
3.31
1.73
8.15
6.73
6.14
5.39
4.76
3.66
2.01
7.91
6.73
6.26
5.55
4.92
3.90
2.13
7.32
6.06
5.47
4.76
4.09
3.11
1.61
10.24
8.43
7.72
6.77
5.91
4.37
2.24
9.88
8.15
7.44
6.54
5.67
4.25
2.17
9.92
8.19
7.44
6.54
5.71
4.25
2.17
7.09
5.91
5.39
4.72
4.09
3.15
1.61

85

Dense
RMS
Error (%)
1.81
1.91
1.97
2.00
2.06
2.10
2.12
2.15
2.16
2.24
2.28
2.28
2.29
2.31
2.33
2.41
2.45
2.60

PCC

Granular

Depth to
Stiff
layer (in)

9

14

700

Backcalculated Moduli (ksi)
PCC
Granular Roadbed
931.5
35.4
18.5
1,077.6
32.2
24.2
1,389.3
24.4
18.4
1,270.9
26.9
17.8
1,053.8
33.0
22.9
1,283.2
25.6
24.8
1,311.5
25.5
25.0
1,079.6
25.8
23.8
1,042.1
34.4
23.0
991.0
36.4
19.5
1,351.4
28.0
22.6
983.6
37.4
19.6
1,377.6
23.0
18.9
1,120.0
28.7
24.7
896.8
14.7
17.9
955.0
15.4
18.9
945.3
15.2
18.8
1,257.8
24.7
24.3

Table 4.5 A summary of the backcalculated granular layer modulus for rigid pavements
FWD File Details
Region

Road

Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay

I-675
I-675
I-675
I-675
I-75
I-75
I-75
I-75
US-10
US127
US127
US-23
US-23
US-23
US-23
US-23
US-23
US-23
US-23
I-475
I-475

Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay

File Name
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-12-05-2005
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-11-30-1999
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS9035-07-02-2008
rigid-B-US10-CS9101-12-18-2007

Depth
to
Stiff
Layer
(in)
250
250
250
250
200
100
700
175
700

Average Backcalculated
Resilient Modulus (ksi)

No. of.
Tests
Conver
ged

Avg
RMS
Error
(%)

PCC

Granular

72
49
75
63
47
19
57
36
5

65
43
56
41
43
19
51
34
0

1.49
1.90
1.78
1.47
1.61
1.53
1.93
1.29
NA

1,136
1,083
875
1,466
1,153
2,446
1,353
4,499
NA

34
39
24
42
30
35
39
59
NA

Roadbed
18
17
13
18
14
9
21
15
NA

No.of
Tests

rigid-B-US127-CS29011-06-27-2008

175

33

29

1.41

5,300

45

15

rigid-B-US127-CS37014-12-19-2007

NA

12

0

NA

NA

NA

NA

rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-08-23-2005-(2)
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-24-2001

700
700
700
700
700
500
500
500
500
500

19
27
68
31
48
34
46
17
60
65

19
27
42
31
24
20
35
11
48
21

2.05
1.99
1.76
1.42
1.59
1.55
1.47
2.08
0.67
1.59

1,123
1,324
1,101
1,038
936
4,246
2,241
1,306
2,948
2,395

62
52
45
53
25
56
57
69
32
40

28
28
27
17
20
31
26
23
25
26

86

Table 4.5 ( ont’d)
FWD File Details
Regio
n

Road

File Name

Grand
Grand
Grand
Grand
Grand
Grand
Grand
Grand
Metro
Metro
Metro
Metro
Metro
Metro
Metro
Metro
Metro
Metro
Metro
Metro
North
North

US-131
US-131
I-96
M-6
M-6
M-6
M-6
US-27
I-69
I-69
I-75
I-94
I-94
I-94
I-94
I-94
I-94
I-94
I-94
M-5
I-75
I-75

rigid-G-US131-CS41131-07-11-1996-(2)
rigid-G-US131-CS59012-04-09-1998
rigid-G-I96-CS34044-06-27-2001
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-11-15-2001
rigid-G-US27-CS19033-06-15-1998
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77024-04-02-2008
rigid-M-I75-CS82194-09-16-2008
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82022-10-06-2005
rigid-M-I94-CS82022-10-13-2005
rigid-M-I94-CS82022-10-26-2005
rigid-M-I94-CS82022-10-31-2005
rigid-M-I94-CS82022-09-30-2005
rigid-M-I94-CS82022-11-01-2005
rigid-M-I94-CS82022-09-16-2008
rigid-M-M5-CS00000-11-29-2006
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-09-14-2001

Depth
to
Stiff
Layer
(in)
700
700
700
700
700
700
700
400
200
NA
700
700
NA
NA
NA
NA
NA
NA
NA
175
700
700

87

Average Backcalculated
Resilient Modulus (ksi)

No.
of
Tests

No. of.
Tests
Conver
ged

Avg.
RMS
Error
(%)

PCC

Granular

9
22
21
57
653
665
159
37
18
36
5
333
35
20
30
36
69
43
11
69
20
29

0
14
8
41
407
419
106
19
14
0
2
139
0
0
0
0
0
0
0
66
13
18

NA
1.22
2.05
2.09
1.74
1.74
1.43
1.02
0.56
NA
1.54
2.18
NA
NA
NA
NA
NA
NA
NA
1.28
2.06
2.19

NA
1,358
2,112
2,284
6,208
6,234
2,032
1,397
1,745
NA
3,065
1,556
NA
NA
NA
NA
NA
NA
NA
1,791
1,139
1,129

NA
31
34
38
34
34
24
30
46
NA
85
53
NA
NA
NA
NA
NA
NA
NA
37
44
27

Roadbed
NA
22
34
38
34
34
24
20
13
NA
18
20
NA
NA
NA
NA
NA
NA
NA
16
21
21

Table 4.5 ( ont’d)
FWD File Details
Region

Road

North
Grand
North
North
North
Southwest
Southwest
Southwest
Southwest
Southwest
Southwest
Southwest
Southwest
Southwest
Southwest
Southwest
Southwest
Southwest
Superior
Superior
Superior
Superior

I-75
M-6
I-75
I-75
I-75
I-196
I-69
I-69
I-69
I-69
I-94
I-94
I-94
US-31
US-31
US-31
US-31
US-31
I-75
I-75
I-75
I-75

File Name
rigid-N-I75-CS16091-09-17-2001
rigid-G-M6-CS41064-09-15-2004
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-27-2001
rigid-N-I75-CS16091-10-26-2001
rigid-So-I196-CS3033-05-14-2008
rigid-So-I69-CS12034-10-08-1998
rigid-So-I69-CS12034-10-09-1998
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-30-2001
rigid-So-US31-CS11057-10-09-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-06-06-2003
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-05-14-2008
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17034-05-25-2000

Depth
to
Stiff
Layer
(in)
700
700
700
700
700
400
700
700
700
700
300
300
300
700
700
700
700
250
250
150
600
400

88

Average Backcalculated
Resilient Modulus (ksi)

No.
of
Tests

No. of.
Tests
Conver
ged

Avg
RMS
Error
(%)

PCC

Granular

68
57
98
86
53
33
7
7
36
65
84
66
12
28
27
16
58
33
63
40
49
16

62
41
74
62
49
4
3
6
34
65
57
46
6
5
24
9
29
24
61
38
42
16

1.83
2.09
1.94
1.77
1.34
1.35
1.74
1.44
1.86
1.23
1.35
1.61
1.03
1.93
1.02
1.61
1.43
1.28
1.26
1.10
1.74
1.77

1,202
2,284
1,131
1,238
1,307
1,417
1,222
1,105
2,292
1,734
1,301
1,024
1,188
1,233
1,521
1,200
1,000
3,582
1,318
912
1,047
1,260

45
38
35
32
61
29
29
39
47
51
26
36
31
33
40
22
24
26
52
37
28
22

Roadbed
20
38
21
21
21
16
27
23
31
20
13
12
11
18
15
19
16
17
15
9
16
18

FWD File Details
Region

Road

Superior
Superior

I-75
M-28

Superior

M-28

Superior
University
University
University
University
University
University

M-28
I-69
I-69
I-69
I-75
I-75
US-23

File Name
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001(2)
rigid-Su-M28-CS17062-05-08-2001
rigid-U-I69-CS19042-09-18-1999
rigid-U-I69-CS19043-06-25-2001
rigid-U-I69-CS19043-05-14-2002
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58152-10-06-2006
rigid-U-US23-CS58034-09-14-2006

Depth
to
Stiff
Layer
(in)
400
300

Average Backcalculated
Resilient Modulus (ksi)

No.
of
Tests

No. of.
Tests
Conver
ged

Avg
RMS
Error
(%)

PCC

Granular

21
21

20
17

1.88
1.31

1,151
1,330

29
37

Roadbed
13
17

300

42

35

1.01

1,019

24

15

400
700
700
700
225
500
225

80
10
17
98
57
21
79

72
10
5
60
40
21
72

1.27
1.04
1.68
1.54
1.51
2.15
1.93

1,137
1,384
1,617
1,876
4,623
959
886

61
40
29
36
43
38
41

16
26
22
25
12
16
20

89

Average Backcalculated Modulus (ksi)

60
50
40
30
20
10
0
CL

SC

SC - SM

SM

SP1

SP2

SP - SM

Soiltype
Granular Layer

Roadbed

Figure 4.6 Average backcalculated granular layer and the roadbed modulus of rigid pavement
obtained from the two layered system for various roadbed soils
Case 1 Analysis - Figure 4.7 shows the distribution of the backcalculated granular layer modulus
for rigid pavement using a two layered system. The data from the figure indicate that the
distribution is slightly skewed to the higher modulus, which might possibly be the outliers.
Hence, it is important to remove all the outliers before the further analysis. Table 4.6 lists the
statistical information including the average, maximum, and minimum values, the standard
th

deviation and the 30 percentile values for the backcalculated granular layer and roadbed
moduli. It should be noted that for a normal distribution, the modulus value corresponding to
th

average (µ) – 2/3*standard deviation (ζ) will be similar to the 30 percentile value. The
maximum backcalculated modulus for the granular layer is about 150 ksi and is definitely an
outlier.

90

Frequency (Number of tests)

1000

Total Number of Tests = 2995

800
600
400
200

>150

141 - 150

131 - 140

121 - 130

111 - 120

101 - 110

91 - 100

81 - 90

71 - 80

61 - 70

51 - 60

41 - 50

31 - 40

21 - 30

11 - 20

< 10

0

Backcalculated Granular Layer Modulus (ksi)
Figure 4.7 Distribution of the backcalculated granular layer moduli for rigid pavements for all
data, case 1
Table 4.6 Descriptive statistics for backcalculated granular layer and roadbed modulus for rigid
pavements for all data, case 1
Statistics
Average
Maximum
Minimum
Standard Deviation
th
30 Percentile

Backcalculated Layer Moduli (ksi)
Granular Layer
Roadbed
38.44
23.49
150.00
62.37
10.00
6.55
19.07
9.50
28.22
17.20

Case 2 Analysis - Figure 4.8 shows the distribution of the backcalculated granular layer modulus
values for case 2 analysis (after deleting the upper and lower 10% of the data) which are
considered outliers. The data in the figure indicate that the number of test results where the
modulus values are higher than 40 ksi decreased relative to case 1 analysis. This was expected
since case 1 involves all the test data. Table 4.7 lists the descriptive statistics (the average,
th

maximum, and minimum values, the standard deviation, and the 30 percentile value) of the

91

backcalculated granular layer and roadbed modulus values. It can be inferred from Table 4.7 that
th

the 30 percentile value for the backcalculated granular layer modulus is 30 ksi.

Frequency (Number of tests)

1000

Total Number of Tests = 2395

800
600
400
200

>150

141 - 150

131 - 140

121 - 130

111 - 120

101 - 110

91 - 100

81 - 90

71 - 80

61 - 70

51 - 60

41 - 50

31 - 40

21 - 30

11 - 20

< 10

0

Backcalculated Granular Layer Modulus (ksi)
Figure 4.8 Distribution of the backcalculated granular layer modulus for rigid pavements after
deleting the upper and lower 10% of the backcalculated moduli, case 2
Table 4.7 Descriptive statistics for backcalculated granular layer and roadbed modulus for rigid
pavement after deleting the upper and lower 10% of the backcalculated moduli, case 2
Statistics
Average
Maximum
Minimum
Standard Deviation
th
30 Percentile

Backcalculated Layer Moduli (ksi)
Granular Layer
Roadbed
35.65
24.96
62.34
62.10
20.81
6.76
9.75
9.59
29.25
18.45

Case 3 Analysis - Figure 4.9 shows the distribution of the backcalculated granular layer modulus
for case 3 analysis (after deleting the upper and lower 20% of the data, which are considered
outliers). The data in the figure indicate that the majority of the modulus values are below 40 ksi

92

and about 25 percent of the data are higher than 40 ksi. The significance of this is that the
number of outliers (modulus higher than 40 ksi) still high even after eliminating 20 percent of the
data on the high side. This reflects the uncertainty in the material characteristics (specifically
thicknesses) that used in the backcalculation routine. Table 4.8 lists the descriptive statistics (the
th

average, maximum, and minimum values, the standard deviation, and the 30 percentile value)
of the backcalculated granular layer and roadbed modulus values. It can be concluded from
th

Table 4.8 that the 30 percentile value for the backcalculated granular layer modulus is also 30
ksi, as in the case 2 analysis. The minimum modulus of 25 ksi, indicates there are some tests
with granular layer modulus in between 20 and 25 ksi, (which are reasonable), and are not
included in this analysis.

Frequency (Number of tests)

1000

Total Number of Tests = 1797

800
600
400
200

>150

141 - 150

131 - 140

121 - 130

111 - 120

101 - 110

91 - 100

81 - 90

71 - 80

61 - 70

51 - 60

41 - 50

31 - 40

21 - 30

11 - 20

< 10

0

Backcalculated Granular Layer Modulus (ksi)

Figure 4.9 Distribution of the backcalculated granular layer modulus for rigid pavement after
deleting the upper and lower 20% of the backcalculated moduli, case 3

93

Table 4.8 Descriptive statistics for backcalculated granular layer and roadbed modulus for rigid
pavement after deleting the upper and lower 20% of the backcalculated moduli, case 3
Statistics
Average
Maximum
Minimum
Standard Deviation
th
30 Percentile

Backcalculated Layer Moduli (ksi)
Granular Layer
Roadbed
34.58
26.25
48.23
47.76
25.57
6.76
6.01
9.57
30.40
19.46

Case 4 Analysis - Results of the backcalculated modulus values using case 4 analyses (75
percentile) are shown in Figure 4.10. As it was expected, the lower modulus values were retained
whereas the number of occurrences where the modulus value is higher than 40 ksi decreased to
about 250 (about 10%). Table 4.9 provides a list of the statistical descriptive of the data of case
4. It can be seen that the average backcalculated modulus value is lower than the averages
reported for analyses cases 1 through 3.This is mainly due to the 75 percentile statistics where
the upper values were eliminated while the lower values were kept in the analyses. The 30

th

percentile value for the backcalculated granular layer moduli is 26.5 ksi. Once again, this value
corresponds to (average (µ) – 2/3*standard deviation (ζ)) for a normal distribution. It also means
that modulus of only 30% of the tests are below the recommended value of the granular layer
modulus of rigid pavement. Therefore it is more conservative.

94

Frequency (Number of tests)

1000

Total Number of Tests = 2245

800
600
400
200

>150

141 - 150

131 - 140

121 - 130

111 - 120

101 - 110

91 - 100

81 - 90

71 - 80

61 - 70

51 - 60

41 - 50

31 - 40

21 - 30

11 - 20

< 10

0

Backcalculated Granular Layer Modulus (ksi)
Figure 4.10 Distribution of the backcalculated granular layer modulus for rigid pavement for
th
backcalculated moduli less than the 75 percentile value, case 4
Table 4.9 Descriptive statistics for backcalculated granular layer and roadbed modulus for rigid
th
pavement for backcalculated moduli less than the 75 percentile value, case 4
Statistics
Average
Maximum
Minimum
Standard Deviation
th

30 Percentile

Backcalculated Layer Moduli (ksi)
Granular Layer
Roadbed
29.95
24.75
44.12
46.38
10.00
6.55
7.65
9.24
26.5
18.54

4.4.2 Flexible Pavements
As stated earlier, the layer moduli of flexible pavements were backcalculated based using both
two and three layered systems and the MICHBACK software. A total of fifty six FWD data files
containing two thousand seven hundred five FWD tests conducted on flexible pavements were
used for the backcalculation of layer moduli (see Table 4.1). The convergence criteria in

95

MICHBACK remained the same as the one noted for rigid pavements. However, the maximum
acceptable RMS error for flexible pavements was set at 2 percent. A sample input (deflection
data and layer thicknesses) and output (backcalculated layer moduli and the backcalculated
modulus of the roadbed soil) data for a segment of US 131 in Grand Region is presented in Table
4.10. A summary of the backcalculated granular layer moduli for all tests conducted on flexible
pavements is presented in Appendix B.
First, a two-layer pavement system (where the aggregate base and the sand subbase were
combined into one granular layer) was used in the backcalculation of layer moduli. One thousand
seven hundred and sixty three (65%) test locations satisfied the convergence criteria. The
averages of the backcalculated granular layer modulus values for each aggregate type and the
roadbed modulus are presented in Figure 4.11. The averages of the backcalculated modulus
values of the AC and granular layers and of the roadbed soils along each road segment of each

Average Backcalculated Modulus (ksi)

FWD data files are listed in Table 4.11.
60
45
30
15
0
Crushed
Asphalt Natural
gravel

Crushed
Asphalt Aggregate
Base

Natural
Gravel Dense

Unknown

Roadbed

Material Type - Gradation
Figure 4.11 Unbound granular layer moduli for flexible pavements (two-layer system)

96

Second, a three-layer pavement system was used to backcalculate the moduli of the base and
subbase layers separately. Note that the types of the aggregate base and sand subbase used in
construction vary with location and the availability of the materials near the construction site.
Having said that, the data indicate that similar sand is used for the subbase layer in all pavement
sections in Michigan. The convergence criteria for the three layer system were set the same as
that for the two layer system. A total of two thousand two hundred three (81%) tests satisfied the
convergence criteria. A summary of the backcalculated moduli of the base and sand subbase
layers along with the roadbed modulus are shown in Figure 4.12. The averages of the
backcalculated modulus values of the AC, aggregate base, and sand subbase layers and of the

Average Backcalculated Modulus (ksi)

roadbed soils along each road segment of each FWD data files are listed in Table 4.12.

80

60

40

20

0
Crushed
Crushed
Natural
asphalt /
asphalt / gravel / dense
natural gravel aggregate
base

Sand
Subbase

Roadbed

Figure 4.12 Unbound granular layer moduli for flexible pavements (three-layer system)

97

All the backcalculated layer moduli using the two and the three layer systems that satisfied the
convergence criteria were further scrutinized using the two concepts stated below.


For a given pavement section, the resilient modulus of the base layer should be greater
than or equal to that of the subbase layer.



The modulus of the granular layer of the two layer system should be lower than the base
modulus and higher than the subbase modulus.

The backcalculated modulus values that satisfied the two concepts were subjected to statistical
analyses. Figure 4.13 shows a statistical summary in the form of a bar chart depicting the total
number of FWD tests, the percent of the tests satisfied the conversion criteria for the two and the
three layer systems, the percent of the tests satisfied the criteria for both systems, the percent of
the tests satisfied the first concept, and the percent of tests satisfied the second concept. Table
4.13 provides a list of the statistical summary of Figure 4.13. It can be seen from Figure 4.13 and
Table 4.13 that FWD tests satisfying the convergence criteria based on the three layered system
analysis is higher than that based on the two layered system. This should not be interpreted that
the results of the three layered system are better or more accurate than the results from the two
layered system.

98

Table 4.10 Sample backcalculated file for a flexible pavement
Region

Road

Control
Section

Project
Number

FWD
Date

Grand

US131

54013

28121

8/18/1994

Pavement Layer
Thicknesses (in)

Material Type
Roadbed

Aggregate
Gradation
Type

File
Flex-G-US131-CS54013-08-18-1994Natural
SP1
Name
(2)
Gravel
Deflections (mils) measured by FWD at various radial distances (in)
0
8
12
18
24
36
60
9.99
7.57
5.97
4.88
4.01
2.67
1.55
9.62
7.27
5.80
4.54
3.56
2.48
1.30
10.78
7.83
6.35
4.90
3.98
2.75
1.26
10.72
7.94
6.69
5.29
4.09
2.43
1.26
9.80
7.30
6.07
4.74
3.79
2.50
1.46
10.60
7.54
6.10
4.75
3.79
2.35
1.29
9.44
7.27
5.66
4.38
3.52
2.08
1.02
10.99
8.18
6.50
5.36
4.01
2.66
1.24
9.07
7.76
6.50
4.93
3.74
2.67
1.51
9.47
7.39
5.81
4.56
3.36
2.35
1.42
9.84
7.55
5.57
4.24
3.25
2.17
1.20
9.37
6.98
5.79
4.66
3.39
2.38
1.35
9.02
6.75
5.13
4.07
3.16
2.03
1.10
9.58
7.05
5.29
4.11
3.16
2.12
1.05
8.92
6.48
5.36
3.85
3.22
2.12
1.05
9.15
6.52
5.24
4.05
3.10
2.07
1.07
9.35
7.09
5.57
4.01
3.16
2.11
1.16
9.59
7.00
5.66
4.24
3.34
2.33
1.15
9.05
6.72
5.43
3.98
3.04
1.89
1.00
99

Dense
RMS
Error (%)
2.07
2.07
4.89
1.91
0.89
2.08
2.62
3.75
3.46
3.10
2.61
2.17
2.15
3.25
3.50
1.94
2.09
3.11
0.51

AC
7.5

Depth to
Stiff
layer
Granular
(in)
25

700

Backcalculated Moduli (ksi)
AC
Granular Roadbed
371.3
44.1
23.5
399.2
41.7
27.7
398.3
31.6
26.3
449.2
26.5
27.6
383.7
41.8
25.0
338.2
35.5
27.2
481.8
29.4
33.2
447.0
25.5
26.8
500.5
36.9
24.1
339.8
45.7
26.4
297.7
40.7
29.5
390.8
42.1
26.5
377.6
41.5
31.6
348.6
39.2
32.3
419.8
40.2
32.1
378.1
41.0
31.9
330.1
42.7
30.9
373.0
39.9
29.7
392.6
37.1
34.7

Table 4.10 ( ont’d)
Region

Road

Control
Section

Project
Number

FWD
Date

Grand

US131

54013

28121

8/18/1994

Pavement Layer
Thicknesses (in)

Material Type
Roadbed

Aggregate
Gradation
Type

File
Flex-G-US131-CS54013-08-18-1994Natural
SP1
Name
(2)
Gravel
Deflections (mils) measured by FWD at various radial distances (in)
0
8
12
18
24
36
60
9.13
6.89
5.55
4.14
3.23
2.17
1.29
8.58
6.01
4.59
3.32
2.48
1.51
0.85
10.49
7.66
6.07
4.52
3.47
2.20
1.07
10.69
7.51
5.88
4.35
3.33
2.17
1.14
9.52
6.79
5.39
4.07
3.15
2.07
1.07
9.69
6.83
5.34
3.93
3.11
1.99
1.04
9.81
7.32
5.96
4.43
3.51
2.25
1.13
9.25
6.88
5.56
4.23
3.34
2.23
1.20
9.20
7.05
5.78
4.48
3.62
2.51
1.51
9.65
7.19
5.70
4.20
3.23
2.04
1.02
9.73
7.36
5.86
4.36
3.34
2.06
0.99
9.08
6.71
5.33
3.91
3.04
1.93
1.01
9.55
7.33
5.85
4.42
3.44
2.21
1.10

100

Dense
RMS
Error (%)
1.80
1.22
2.28
1.40
1.79
1.89
1.84
1.17
1.03
1.70
1.76
1.15
1.83

AC
7.5

Depth to
Stiff
layer
Granular
(in)
25

700

Backcalculated Moduli (ksi)
AC
Granular Roadbed
341.2
46.8
28.4
310.1
46.2
41.9
346.7
31.1
31.2
279.9
36.7
30.3
342.7
40.0
31.9
310.9
40.5
32.8
399.1
33.4
30.0
390.6
40.7
29.1
372.7
49.2
24.1
383.6
33.2
33.3
421.3
29.4
33.7
378.4
38.5
34.2
429.2
32.4
30.8

Table 4.11 A summary of the backcalculated granular layer modulus for flexible pavements (two – layered system)

Region

Road

File Name

Depth
to Stiff
Layer
(in)

Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Grand
Grand
Grand
Grand
Grand
Grand
Grand
Grand
Grand
Grand
Grand
Grand
Grand

M-57
M-57
M-57
M-57
M-57
M-84
M-84
M-84
M-84
M-84
M-84
M-120
M-120
M-20
M-37
M-57
M-57
M-57
M-57
M-57
M-57
US-131
US-131
US-131

flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-10-2005
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-24-1998
flex-G-M20-CS54041-04-09-2002
flex-G-M37-CS62032-05-18-2000
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS29021-5-23-1995
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(3)

700
700
700
700
700
300
400
160
250
200
275
700
700
700
700
700
700
700
700
700
200
700
700
700

FWD File Details

101

No.
of
Tests

No. of
Tests
Converg
ed

Avg.
RMS
Error
(%)

134
66
66
67
67
39
69
32
16
16
16
74
74
68
40
108
53
53
54
53
83
65
32
65

65
43
41
25
24
30
52
30
16
8
16
28
28
48
25
81
40
43
34
33
61
64
16
47

1.41
1.41
1.39
1.70
1.69
1.07
1.15
1.40
0.91
1.52
0.97
1.43
1.43
1.09
1.28
1.20
1.21
1.27
1.32
1.27
1.28
0.89
1.49
1.51

Average Backcalculated
Modulus (ksi)
RoadAC
Granular
bed
269
26
26
279
27
26
279
27
26
266
28
29
266
28
30
1058
25
19
1224
23
20
2959
47
20
774
32
27
413
36
22
1179
35
26
192
29
19
192
29
19
26
593
24
21
433
21
29
2447
44
30
2756
43
30
2680
44
32
2658
44
29
2664
44
23
2331
38
30
311
70
31
373
38
28
355
38

Table 4.11 ( ont’d)

Region

Road

File Name

Depth
to Stiff
Layer
(in)

Grand
Grand
Grand
Grand
Metro
Metro
Metro
Metro
Metro
Metro
Metro
North
North
North
North
North
North
North
North
North
North
North
North

US-131
US-131
US-131
US-131
I-94
M-53
M-53
M-53
M-53
M-53
M-53
I-75
I-75
I-75
I-75
I-75
I-75
M-55
US-131
US-23
US-23
US-23
US-23

flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS59012-06-25-1998
flex-M-I94-CS77111-04-02-2008
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-04-04-2008
flex-M-M53-CS50015-04-09-2009
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-23-1997
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-US131-CS67017-05-01-2002
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008-(2)

700
700
700
700
100
300
300
300
300
300
300
700
700
700
700
700
700
700
700
200
150
700
300

FWD File Details

102

No.
of
Tests

No. of
Tests
Converg
ed

Avg.
RMS
Error
(%)

33
33
181
25
29
13
13
13
13
10
13
90
90
92
111
97
93
76
93
11
11
11
11

18
18
130
20
5
13
13
13
13
8
11
62
61
65
63
61
71
35
79
6
9
11
8

1.15
1.52
1.26
1.46
1.78
0.65
0.95
0.84
0.83
1.07
1
1.34
1.36
1.36
1.53
1.09
1.09
1.74
0.63
1.77
1.49
0.91
1.60

Average Backcalculated
Modulus (ksi)
RoadAC
Granular
bed
352
38
31
352
38
31
937
31
34
530
38
29
1938
12
5
1511
7
25
979
9
24
1350
9
25
1413
9
24
1122
16
22
553
11
23
460
49
31
516
55
40
364
49
30
441
53
40
1073
37
30
977
38
31
250
30
23
1696
27
23
1293
62
16
2127
60
14
552
31
21
2175
63
24

Table 4.11 ( ont’d)
FWD File Details
Region

Road

Superior
Superior
Superior
Superior
Superior
Superior
Superior
Superior
University

I-75
M-28
M-28
M-38
US-141
US-2
US-2
US-41
M-52

File Name
flex-Su-I75-CS49025-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US2-CS27022-05-20-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US41-CS7013-05-19-2008
flex-U-M52-CS33051-11-13-2002

Depth
to Stiff
Layer
(in)

No.
of
Tests

No. of
Tests
Converg
ed

Avg.
RMS
Error
(%)

150
700
700
350
700
250
300
150
250

11
10
11
11
13
11
11
11
44

4
10
11
7
12
7
10
11
39

1.41
0.66
0.65
1.74
1.10
1.47
1.28
1.28
1.14

103

Average Backcalculated
Modulus (ksi)
RoadAC
Granular
bed
784
35
55
2256
23
22
1720
27
21
1569
31
18
1075
17
21
973
45
21
3988
60
21
2060
30
11
777
24
24

Table 4.12 A summary of the backcalculated granular layer modulus for flexible pavements (three – layered system)
FWD File Information
Region

Road

Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Bay
Grand
Grand
Grand
Grand
Grand
Grand
Grand
Grand
Grand
Grand
Grand

M-57
M-57
M-57
M-57
M-57
M-84
M-84
M-84
M-84
M-84
M-84
M-120
M-120
M-20
M-37
M-57
M-57
M-57
M-57
M-57
M-57
US-131

Grand

File Name

flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-10-2005
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-24-1998
flex-G-M20-CS54041-04-09-2002
flex-G-M37-CS62032-05-18-2000
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS29021-5-23-1995
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994US-131
(2)

Depth
to Stiff
Layer
(in)

No.
of
Tests

No. of
Tests
Conve
rged

Avg.
RMS
Error
(%)

700
700
700
700
700
300
400
160
250
200
275
700
700
700
700
700
700
700
700
700
200
700

134
66
66
67
67
39
69
32
16
16
16
74
74
68
40
108
53
53
54
53
83
65

65
60
54
55
60
39
69
32
16
8
16
68
68
58
35
78
40
43
34
33
80
63

1.16
1.12
1.09
1.10
1.12
0.67
0.68
1.23
0.51
1.14
0.48
1.10
1.10
0.71
0.96
0.77
0.80
0.84
0.85
0.72
0.96
0.72

700

32

22

1.05

104

Average Backcalculated Modulus
(ksi)
Sub- RoadAC
Base
base
bed
261
26
26
26
275
27
27
26
287
27
27
26
284
28
28
26
274
25
28
26
858
37
22
19
987
38
22
20
2275
82
41
20
670
38
31
27
372
38
35
22
977
46
33
26
180
30
31
19
180
30
31
19
516
33
26
26
401
26
50
18
2088
52
38
30
2571
45
46
30
2509
44
47
30
2558
41
54
28
2382
49
46
29
2157
41
41
23
326
58
34
28
334

48

38

31

Table 4.12 ( ont’d)
FWD File Information
Region

Road

Grand

US-131

Grand

US-131

Grand

US-131

Grand
Grand
Metro
Metro
Metro
Metro
Metro
Metro
Metro
North
North
North
North
North
North
North
North
North

US-131
US-131
I-94
M-53
M-53
M-53
M-53
M-53
M-53
I-75
I-75
I-75
I-75
I-75
I-75
M-55
US-131
US-23

File Name
flex-G-US131-CS54013-08-18-1994(3)
flex-G-US131-CS54013-08-18-1994(4)
flex-G-US131-CS54013-08-18-1994(5)
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS59012-06-25-1998
flex-M-I94-CS77111-04-02-2008
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-04-04-2008
flex-M-M53-CS50015-04-09-2009
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-23-1997
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-US131-CS67017-05-01-2002
flex-N-US23-CS1052-06-03-2008

Average Backcalculated Modulus
(ksi)
Sub- RoadAC
Base
base
bed

Depth
to Stiff
Layer
(in)

No.
of
Tests

No. of
Tests
Conve
rged

Avg.
RMS
Error
(%)

700

65

64

0.76

319

53

34

28

700

33

23

1.12

330

49

38

31

700

33

24

1.12

330

49

38

31

700
700
100
300
300
300
300
300
300
700
700
700
700
700
700
700
700
200

181
25
29
13
13
13
13
10
13
90
90
92
111
97
93
76
93
11

106
22
0
NA
NA
NA
NA
NA
NA
88
86
90
76
62
75
73
79
8

0.90
1.24
0.00
NA
NA
NA
NA
NA
NA
1.09
1.26
1.07
1.32
0.76
0.73
1.17
0.36
1.65

972
543
NA
NA
NA
NA
NA
NA
NA
440
549
354
472
968
1043
279
1506
1068

13
33
NA
NA
NA
NA
NA
NA
NA
56
39
52
47
47
31
14
49
72

169
62
NA
NA
NA
NA
NA
NA
NA
50
86
47
68
58
77
59
27
58

30
29
NA
NA
NA
NA
NA
NA
NA
31
36
30
36
30
31
20
23
17

105

Table 4.12 ( ont’d)
FWD File Information
Region

Road

Grand

US-131

North
North
North
Superior
Superior
Superior
Superior
Superior
Superior
Superior
Superior
Universi
ty

File Name

flex-G-US131-CS54013-08-18-1994(3)
US-23 flex-N-US23-CS4032-06-03-2008
US-23 flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008US-23
(2)
I-75
flex-Su-I75-CS49025-05-22-2008
M-28 flex-Su-M28-CS17061-05-22-2008
M-28 flex-Su-M28-CS75061-05-21-2008
M-38 flex-Su-M38-CS66042-05-20-2008
US-141 flex-Su-US141-CS7022-05-19-2008
US-2 flex-Su-US2-CS27022-05-20-2008
US-2 flex-Su-US2-CS75021-05-22-2008
US-41 flex-Su-US41-CS7013-05-19-2008
M-52

flex-U-M52-CS33051-11-13-2002

Average Backcalculated Modulus
(ksi)
Sub- RoadAC
Base
base
bed

Depth
to Stiff
Layer
(in)

No.
of
Tests

No. of
Tests
Conve
rged

Avg.
RMS
Error
(%)

700

65

64

0.76

319

53

34

28

150
700

11
11

8
11

1.00
0.45

1184
461

174
49

43
35

13
21

300

11

9

1.00

1108

218

37

25

150
700
700
350
700
250
300
150

11
10
11
11
13
11
11
11

6
10
11
11
13
10
10
11

0.88
0.39
0.41
0.67
0.59
0.82
0.73
1.15

761
1831
1366
920
807
855
2035
1802

41
54
56
57
29
43
282
34

55
18
21
25
14
33
30
30

54
22
22
18
21
22
23
11

250

44

42

0.51

963

7

140

24

106

Total number of FWD tests = 2705

Tests satisfying the convergence
criteria in two layer analysis
Tests satisfying the convergence
criteria in three layer analysis

Tests satisfying the convergence
criteria in both two and three layer
analysis
Tests where the backcalculated base
modulus > subbase modulus
Tests where the backcalculated base
modulus > granular modulus >
subbase modulus
0

20

40

60

80

100

Percentage of FWD tests
Figure 4.13 A summary of the tests converged in two and three layer analyses

Table 4.13 Statistical summary of the tests converged in two and three layered analyses
Statistics
Total number of FWD tests

Tests
2705

Percent
100

Tests satisfying the convergence criteria in
two layer analysis

1763

65

Tests satisfying the convergence criteria in
three layer analysis

2204

81

Tests satisfying the convergence criteria in
both two and three layer analysis

1525

56

1212

45

768

28

Tests where the backcalculated base
modulus > subbase modulus
Tests where the backcalculated base
modulus > granular modulus > subbase
modulus

107

Table 4.14 A summary of the average backcalculated moduli using two and three layer analyses
for flexible pavements
Pavement Layer Moduli for
Two Layer System (ksi)
Material Type

Pavement Layer Moduli for Three
Layer System (ksi)
Sand
Base
Roadbed
Subbase
Layer
Layer

Granular
Layer

Roadbed

Crushed Asphalt Natural Gravel

35.8

28.7

28.5

41.5

39.6

Crushed Asphalt Aggregate Base

51.5

35.4

33.7

77.6

50.2

38.2

28.7

29.7

36.4

71.9

29.8

25.0

23.5

55.8

46.3

Natural Gravel Dense Gradation
Unknown

Indeed, on the average, the results of the two layered system are more reasonable than those of
the three layered system. To illustrate, consider the data shown in Figures 4.11 and 4.12 and
listed in Table 4.14. It can be seen that:


For all base types, the average backcalculated modulus values of the roadbed soils from
the three layered system are almost the same as that from the two layered system.



For the crushed asphalt over natural gravel bases, the average backcalculated modulus of
the granular layer (two layered system) is reasonable and similar to that of the average
backcalculated modulus of the base layer using the three layered system. However, the
average backcalculated modulus of the sand subbase (three layered system) is very high
and unreasonable.



For the crushed asphalt over aggregate base, the average of the backcalculated modulus
value of the sand subbase is greater than the average backcalculated modulus of the base
layer, and is unreasonable. The average backcalculated modulus of the granular layer
(two layer system) the average backcalculated modulus of the base layer (three layer

108

system) are similar.


For the dense natural gravel, the average backcalculated granular layer modulus is
reasonable. However, the averages of the backcalculated modulus values of the base and
subbase layers (three layered system) are very high and not reasonable.

Some of the reasons of the above observations include:


The number of unknowns (modulus and Poisson’s ratio of each layer) in the three layered
system is higher than that of the two layered system. Whereas the number of measured
deflections in both systems is the same.



The uncertainty in the input data especially the layer thicknesses is higher in the three
layered system than in the two layered system.

Perhaps, the other way to scrutinize the above observations is to examine the average
backcalculated layers and roadbed moduli using the two and three layer systems shown in Figure
4.14. Once again, regardless of the type of the roadbed soils, the averages of the backcalculated
modulus values of the roadbed soils using two and three layered systems are almost the same.
The data in Figure 4.14 also shows that the backcalculation of the layer moduli based on three
layered system produces some high and unreasonable base and subbase moduli. Whereas, for all
roadbed soil types, the two layered system, produces reasonable modulus values.
Based on the above observations, one may conclude that the results from the two layered system
are more reasonable than those from the three layered system. Hence, the results of the two
layered system should be considered first to be used in the flexible and rigid pavement design
processes. However, if it is desirable to use different modulus values for the base and subbase
layers, additional statistical analysis should be conducted. Results of such analyses are presented
below.

109

Nevertheless, the backcalculated base and subbase moduli where bracketed in certain modulus
ranges separated by 10 ksi intervals. The brackets are less than 10 ksi, 10 to 20, 20 to 30, 30 to
40, 40 to 50, 50 to 60, 60 to70, 70 to 80, 80 to 90, 90 to 100, and more than100 ksi. The
frequency of the base or subbase modulus value that fall within a modulus bracket was
calculated and the data are plotted in Figure 4.15. The backcalculated modulus of the sand
subbase varies from about 10 to about 80 ksi. The results are not reasonable and probably not
accurate. In the other 25 percent of all tests, the backcalculate base modulus varied from about
50 to about 200 ksi. Certainly, the latter value is not acceptable and not reasonable.

35

Frequency (%)

30
25
20
15
10
5
>100

91 - 100

81 - 90

71 - 80

61 - 70

51 - 60

41 - 50

31 - 40

21 - 30

11 - 20

< = 10

0

Backcalculated Modulus (ksi)
Base Modulus

Subbase Modulus

Figure 4.15 Distribution of backcalculated base and subbase moduli (three layered system)

110

140

Average Backcalculated Modulus (ksi)

120

100

80

60

40

20

0
CL

ML

SC

SC - SM

SM

SP1

SP2

SP - SM

Roadbed Soiltype
Granular Layer Modulus (two -layer)

Roadbed Modulus (two - layer)

Subbase Modulus (three - layer)

Roadbed Modulus (three - layer)

Base Modulus (three - layer)

Figure 4.14 Average backcalculated layers and roadbed soil moduli obtained from two and three layered systems for various types of
roadbed soils

111

Case 1 Analysis - Figure 4.16 depicts the distribution of the backcalculated base modulus in
flexible pavements using the three layered system. Once again, it can be seen from the figure that
more than 70 percent (562 tests) showed a base modulus higher than 40 ksi. Likewise, figure
4.17 shows the distribution of the backcalculated subbase modulus in flexible pavements using
the three layered system. The data in the figure indicate that about 15 percent of the test results
are higher than 40 ksi. Once again, modulus values of the base and subbase higher than 40 ksi
are not acceptable unless information regarding the stability of the materials is known. In the
above cases, no information suggests that the bases and subbases were stabilized using asphalt or
cement.

Frequency (Number of tests)

300
Total Number of tests = 768

200

100

> 65

61 - 65

56 - 60

51 - 55

46 - 50

41 - 45

36 - 40

31 - 35

26 - 30

21 - 25

< = 20

0

Backcalculated Base Modulus (ksi)
Figure 4.16 Distribution of the backcalculated base moduli of flexible pavements using three
layered system, case 1

112

Frequency (Number of Tests)

300
Total Number of tests = 768

200

100

> 60

56 - 60

51 - 55

46 - 50

41 - 45

36 - 40

31 - 35

26 - 30

21 - 25

16 - 20

<= 15

0

Backcalculated Subbase Modulus (ksi)
Figure 4.17 Distribution of the backcalculated subbase moduli of flexible pavements using three
layered system, case 1
The descriptive statistics, (average, maximum and minimum values, the standard deviation and
th

the 30 percentile modulus value) of the backcalculated base, subbase and roadbed moduli are
listed in Table 4.15. Once again, the value of average – 2/3*standard deviation for a normal
th

distribution should be similar to the 30 percentile value. For comparison purposes, similar
descriptive statistics are also included for the granular layer and roadbed modulus values
obtained from the two layered system. The data in the table show that the maximum, minimum
and average roadbed modulus values are similar for both two and three layer system. Another
observation is that the minimum, maximum and average modulus values of the granular layer are
between the corresponding values of the base and subbase layers of the three layered system.
Both observations were expected because the roadbed soils are not influenced much by the
applied load due to their depths. On the other hand, the granular layer modulus represents the

113

combined moduli of the base and subbase layers.
Table 4.15 Descriptive statistics for backcalculated pavement layer moduli for flexible
pavements using both two and three layered systems, case 1

Statistics

Average
Maximum
Minimum
Standard Deviation
th
30 Percentile

Backcalculated Pavement Layer Modulus (ksi)
Two layer Analysis
Three Layer Analysis
Granular
Layer
34.00
94.23
11.12
12.43
26.40

Roadbed
25.95
67.79
7.09
7.54
21.34

Roadbed
26.10
67.84
7.34
7.44
21.70

Subbase
Layer
28.77
78.54
8.34
10.72
22.44

Base
63.49
388.12
16.94
46.13
42.84

Case 2 Analysis – In this case, the upper and lower ten percent of the backcalculated resilient
modulus values were eliminated from the analyses and considered as outliers. The remaining 80
percent of the data were subjected to further analyses. Figure 4.18 shows the distribution of the
backcalculated base modulus values for flexible pavements using the three layered system. The
data in the figure shows that the modulus values of about 80% (412) of the test results are more
than 40 ksi. Figure 4.19 shows the distribution of the backcalculated subbase layer modulus
values for case 2. There are only 49 backcalculated subbase modulus values higher than 40 ksi.
Once again, the backcalculated base and subbase modulus values greater than 40 ksi are not
acceptable. The descriptive statistics, (average, maximum and minimum modulus values, the
th

standard deviation and the 30 percentile modulus value) for the base, subbase and roadbed
modulus and those obtained from the two layered system are listed in Table 4.16. The data in the
table shows similar trends as those reported in Table 4.15.

114

Frequency (Number of Tests)

300
Total Number of tests = 502

200

100

> 65

61 - 65

56 - 60

51 - 55

46 - 50

41 - 45

36 - 40

31 - 35

26 - 30

21 - 25

< = 20

0

Backcalculated Base Modulus (ksi)

300

Total Number of tests = 502

200

100

> 60

56 - 60

51 - 55

46 - 50

41 - 45

36 - 40

31 - 35

26 - 30

21 - 25

16 - 20

0
<= 15

Frequency (Number of Tests)

Figure 4.18 Distribution of the backcalculated base moduli of flexible pavements using three
layered system after deleting the upper and lower 10 percent of the backcalculated moduli, case 2

Backcalculated Subbase Modulus (ksi)
Figure 4.19 Distribution of the backcalculated subbase moduli of flexible pavements using three
layered system after deleting the upper and lower 10 percent of the backcalculated moduli, case 2

115

Table 4.16 Descriptive statistics for backcalculated pavement layer moduli for flexible
pavements using both two and three layered systems after deleting the upper and lower 10
percent of the backcalculated moduli, case 2

Statistics

Average
Maximum
Minimum
Standard Deviation
th
30 Percentile

Backcalculated Pavement Layer Modulus (ksi)
Two layer Analysis
Three Layer Analysis
Granular
Layer
33.79
67.37
18.73
7.38
29.71

Roadbed
26.96
67.79
8.71
7.38
23.41

Roadbed
27.02
67.84
8.71
7.29
23.55

Subbase
Layer
29.16
42.74
16.02
6.90
25.33

Base
54.43
98.37
27.95
16.07
44.03

Case 3 Analysis – In this case, the upper and lower twenty percent of the backcalculated resilient
modulus values were eliminated from the analyses and considered as outliers. The remaining 60
percent of the data were subjected to further analyses. Figure 4.20 shows the distribution of the
backcalculated base modulus values after deleting the upper and lower 20% from the file. The
data in the figure shows that about 85% (234) of the backcalculated base modulus values are
higher than 40 ksi. Figure 4.21 shows the distribution of the backcalculated subbase layer
modulus values for analysis case 3. It can be seen that none of the backcalculated subbase layer
modulus values is greater than 40 ksi. These results, as it was expected, are better than those
reported for analysis case 1. However, the number of tests has decreased substantially. The
descriptive statistics, (average, maximum and minimum modulus values, the standard deviation
th

and the 30 percentile modulus value) for the base, subbase and roadbed modulus and those
obtained from the two layered system are listed in Table 4.17. The data in the table shows similar
trends as those reported in Table 4.15.

116

Frequency (Number of Tests)

300
Total Number of tests = 276

200

100

> 65

61 - 65

56 - 60

51 - 55

46 - 50

41 - 45

36 - 40

31 - 35

26 - 30

21 - 25

< = 20

0

Backcalculated Base Modulus (ksi)

Frequency (Number of Tests)

Figure 4.20 Distribution of the backcalculated base moduli of flexible pavements using three
layered system after deleting the upper and lower 20 percent of the backcalculated moduli, case 3
300

Total Number of tests = 276

200

100

> 60

56 - 60

51 - 55

46 - 50

41 - 45

36 - 40

31 - 35

26 - 30

21 - 25

16 - 20

<= 15

0

Backcalculated Subbase Modulus (ksi)
Figure 4.21 Distribution of the backcalculated subbase moduli of flexible pavements using three
layered system after deleting the upper and lower 20 percent of the backcalculated moduli, case 3

117

Table 4.17 Descriptive statistics for backcalculated pavement layer moduli for flexible
pavements using both two and three layered systems after deleting the upper and lower 20
percent of the backcalculated moduli, case 3

Statistics

Average
Maximum
Minimum
Standard Deviation
th
30 Percentile

Backcalculated Pavement Layer Modulus (ksi)
Two layer Analysis
Three Layer Analysis
Granular
Layer
34.01
48.32
22.10
5.27
31.10

Roadbed
27.46
67.79
11.95
7.21
23.97

Roadbed
27.55
67.84
11.99
7.06
24.23

Subbase
Layer
29.33
37.37
18.93
4.79
26.48

Base
52.84
72.43
35.54
10.32
45.66

Case 4 Analysis – In this case, all backcalculated base and subbase modulus values less than the
75 percentile were analyzed. The upper 25 percent of the data were considered outliers. It should
be noted that for any given FWD test, if the backcalculated moduli from both the base and the
th

subbase were less than the corresponding 75 percentile, the data were included in this case.
Otherwise, the data were excluded. The backcalculated layer moduli from 425 tests passed the
test and are included in the analysis. The distributions of the backcalculated base and subbase
moduli for this case are depicted in Figures 4.22 and 4.23 based on bracket interval of 5 ksi. It
can be seen that the backcalculated base modulus value varies from a low of 20 ksi to a high of
more than 65 ksi. Likewise, the subbase modulus varies from less than 15 ksi to more than 60
ksi. Table 4.18 summarizes the maximum, minimum, and the average backcalculated modulus
th

values, the standard deviation and 30 percentile modulus values for both two and three layered
systems. Examination of the data listed in Table 4.18 indicates that the average backcalculated
base modulus for the 75 percentile data slightly high. Hence, the average base, subbase, and
granular layer modulus values to be used in the design of flexible pavements was reduced by two
thirds of the standard deviation. The recommended values are listed at the bottom part of Table

118

300
Total Number of tests = 425
200

100

> 65

61 - 65

56 - 60

51 - 55

46 - 50

41 - 45

36 - 40

31 - 35

26 - 30

21 - 25

0
< = 20

Frequency (Number of Tests)

4.18.

Backcalculated Base Modulus (ksi)
Figure 4.22 Distribution of the backcalculated base moduli of flexible pavements using three
th
layered system for data less than the 75 percentile value of the backcalculated moduli, case 4

Frequency (Number of Tests)

300
Total Number of tests = 425

200

100

> 60

56 - 60

51 - 55

46 - 50

41 - 45

36 - 40

31 - 35

26 - 30

21 - 25

16 - 20

<= 15

0

Backcalculated Subbase Modulus (ksi)
Figure 4.23 Distribution of the backcalculated subbase moduli of flexible pavements using three
th
layered system for data less than the 75 percentile value of the backcalculated moduli, case 4

119

Table 4.18 Descriptive statistics for backcalculated pavement layer moduli for flexible
th
pavements using both two and three layered systems for all data less than the 75 percentile
value of the backcalculated moduli, case 4

Statistics
Average
Maximum
Minimum
Standard Deviation
th
30 Percentile

Backcalculated Pavement Layer Modulus (ksi)
Two layer Analysis
Three Layer Analysis
Granular
Subbase
Layer
Roadbed Roadbed
Layer
Base
27.30
24.51
24.58
23.86
42.68
46.44
67.79
67.84
35.85
67.71
11.18
8.71
8.71
8.56
16.94
7.48
7.27
7.22
6.62
13.78
23.50
20.30
19.77
19.45
33.49

From the data listed in Tables 4.9 and 4.18, it can be seen that:


The modulus of the roadbed under flexible and rigid pavements is similar. Hence, it can
be concluded that the pavement type (rigid or flexible) did not have much impact on the
roadbed modulus.



The backcalculated granular layer modulus for rigid and flexible pavements is similar,
which indicate that the pavement type did not have much impact on the backcalculated
granular layer moduli. Nevertheless, further analyses are conducted on the backcalculated
granular layer moduli for both flexible and rigid pavements to study the impact of the
pavement type and are presented in the next section (4.5).

4.5 IMPACT OF PAVEMENT TYPE ON THE BACKCALCULATED MODULI
As stated earlier, MICHBACK was used to backcalculate the resilient modulus of both rigid and
flexible pavements in a two layer pavement system. A total of two thousand nine hundred ninety
three (64%) FWD tests conducted on rigid pavements and one thousand seven hundred and sixty
three tests (65%) on flexible pavements satisfied the convergence criteria. The backcalculated
granular layer moduli for both flexible and rigid pavements follow a similar distribution, as
shown in Figure 4.24, which is slightly skewed towards the higher moduli. The granular layer
120

th

modulus values varied from 3 to 150 ksi. However, the 75 percentile modulus value of the
granular layer under both flexible and rigid pavements is about 50 ksi. Hence, one may conclude
that the two sets of data (under rigid and flexible pavements) are similar. Indeed, t-tests at
confidence level of 95 percent were conducted on all averages of cases 1 through 4. It was found
that the two sets of data of cases 3 and 4 are similar whereas the data for cases 1 and 2 are
statistically different. Results of the t-tests are summarized in Table 4.19. Figure 4.25 shows the
averages of the backcalculated granular layer modulus, using two layered system, for both
flexible and the pavement layer. The data in the figure indicate the average backcalculated
granular layer moduli for flexible and rigid pavement correspond very well. It should be noted
that, for rigid pavements, the effect of temperature and curling of the PCC slab were not
considered during the backcalculation.

25
20
15
10
5

Backcalcualted Granular Layer Modulus (ksi)
Rigid pavement

Flexible pavement

Figure 4.24 Distribution of the backcalculated granular layer moduli

121

> 150

141 - 150

131 - 140

121 - 130

111 - 120

101 - 110

91 - 100

81 - 90

71 - 80

61 - 70

51 - 60

41 - 50

31 - 40

21 - 30

11 - 20

0
<= 10

Frequency (%)

30

Average Backcalculated Granular Layer
Modulus (ksi)

40

35

30

25
Case 1

Case 2

Case 3

Case 4

Analysis Scenarios
Rigid Pavement

Flexible Pavement

Figure 4.25 Comparison between backcalculated granular layer resilient moduli for flexible and
rigid pavements
Table 4.19 A summary of the results of the statistical analysis of backcalculated granular
modulus for rigid and flexible pavements

Analysis
scenario

Mean
difference
(psi)

tstatistic

Pvalue

Case 1
Case 2
Case 3
Case 4

3407.1
1645.3
629.7
333.0

7.098
4.415
1.854
0.944

0.000
0.000
0.064
0.345

95% confidence
interval for the
difference (psi)
Lower
Upper
2466.0
4348.2
914.7
2375.8
-36.3
1295.7
-358.6
1024.6

Statistically
similar?
No
No
Yes
Yes

Additionally, for cases 1 and 2, where the means are significantly different, the mean values of
the granular layer modulus under flexible and rigid pavements vary between 30 and 40 ksi.
The pavement design software DNPS86 of the American Association of State Highway and
Transportation Officials (AASHTO) was used to study the impact of the granular layer moduli
on the thickness of the PCC slab and the HMA. The results are shown, respectively, in Figures
4.26. The data in Figure 4.26 indicate that the unbound granular layer modulus does not have

122

much impact on the PCC slab thicknesses. This may be due to the very high modulus of the
concrete slab. However, the granular layer modulus has a significant impact on the HMA
thickness.

Layer Thickness (in)

12
10
8
6
4
20

30

40

50

60

70

80

Granular Layer Modulus (ksi)
Concrete Slab

HMA

Figure 4.26 Impact of unbound granular layer moduli on the thicknesses of concrete slab and the
HMA layer
4.6 IMPACT OF AGGREGATE CHARACTERISTICS ON THE MODULUS OF THE
UNBOUND GRANULAR LAYER
Some aggregate characteristics such as type, gradation, angularity and moisture content have a
significant impact on the resilient modulus. Some of the commonly used aggregates in Michigan
include natural gravel, dolomite, and crushed concrete. The gradation of these aggregates, either
open or dense, depends upon the type of pavement and its location. Table 4.20 lists the number
of test for each aggregate type that converged in the backcalculation procedure. The angularity
and the moisture content of the aggregates used in the unbound granular layer are not known.
Therefore, the impact of only the aggregate type and gradation on the unbound granular layer

123

moduli is analyzed and presented in the next few subsections.
Table 4.20 Number of tests for each aggregate type and gradation

Material Type
Crushed Concrete
Dolomite
Natural Gravel

Gradation
Dense
Open
Dense
Open

No of Tests
Rigid
Flexible
Pavement
Pavement
867
N/A
10
N/A
370
131
180
N/A

N/A - Not Available
4.6.1 Aggregate Type
The average of backcalculated resilient moduli for each material type and for the two and three
layered analysis and for the four cases are shown in Figures 4.27 through 4.30. The data in the
figures indicate that irrespective of the material type, the average backcalculated modulus was

Average Backcalculated Granular Layer
Modulus (ksi)

found to range from about 30 to about 40 ksi.
45

40

35

30

25
Crushed
Concrete Dense

Dolomite Open

Natural
Gravel Dense

Natural gravel
- Open

Material Type - Gradation
Figure 4.27 Averages of the backcalculated granular layer resilient modulus from two layered
system for each material type for all backcalculated moduli data, case 1

124

Average Backcalculated Granular
Layer Modulus (ksi)

45
40
35
30
25
Crushed
Concrete Dense

Dolomite Open

Natural
Gravel Dense

Natural gravel
- Open

Material Type - Gradation

Average Backcalculated Granular Layer
Modulus (ksi)

Figure 4.28 Averages of the backcalculated granular layer resilient modulus from two layered
system for each material type after deleting the upper and lower 10 percent of the backcalculated
moduli, case 2
45
40
35
30
25
Crushed
Concrete Dense

Dolomite Open

Natural
Gravel Dense

Natural gravel
- Open

Material Type - Gradation
Figure 4.29 Averages of the backcalculated granular layer resilient modulus from two layered
system for each material type after deleting the upper and lower 20 percent of the backcalculated
moduli, case 3

125

Average Backcalculated Granular Layer
Modulus (ksi)

45
40
35
30
25
Crushed
Concrete Dense

Dolomite Open

Natural
Gravel Dense

Natural gravel
- Open

Material Type - Gradation
Figure 4.30 Averages of the backcalculated granular layer resilient modulus from two layered
th
system for each material type for moduli less than the 75 percentile value, case 4.
4.6.2 Aggregate Gradation
Granular bases are classified as either open or dense graded. Base layers with an aggregate
gradation of 21AA, 21A, 22A are dense graded and 2G and 4G are open graded bases per
MDOT specifications. The primary purpose of the open graded base is to provide better drainage
facilities and hence is typically referred to as Open Graded Drainable Course (OGDC). The
grading requirements for dense (22A) and open (4G) graded aggregates are listed in Table 4.21.
In the pavement design process, MDOT typically uses 30 and 24 ksi as the design moduli for
dense and open graded bases, respectively. Comparison of the average backcalculated resilient
modulus for open and dense graded bases, for all analysis scenarios, is presented in Figure 4.31.
The data in the figure indicate that the differences in the means are negligible. An independent
sample t-test conducted on the means of the backcalculated granular layer moduli for open and
dense graded bases proved that the results are statistically similar. The results of the independent

126

sample t-test at 95% confidence interval, for all analysis scenarios, are listed in Table 4.22. The
data in the table indicate that the aggregate gradation does not have much impact on the
backcalculated granular layer modulus.
Table 4.21 Grading requirements for dense and open graded aggregates (MDOT 2003)
Total Percent Passing
Sieve Sizes

Dense Gradation
(22A)

Open Gradation
(4G)

1.5 in

100

1 in

100

¾ in

90-100

60-80

½ in

35-65

3/8 in

65-85

No. 4
No. 8

30-50

10-25

No. 30

5-18

Average Backcalculated Granular Layer
Modulus (ksi)

Passing No. 200

4-8

6.0 Max

40

35

30

25

Case 1

Case 2

Case 3

Case 4

Analysis Scenario
Dense Gradation

Open Gradation

Figure 4.31 Comparison of backcalculated granular layer resilient modulus for dense and open
graded bases from two layered pavement system

127

Table 4.22 Summary of the results of statistical analysis of backcalculated granular moduli for
dense and open graded unbound granular layer moduli

Analysis
scenario

Mean
difference
(psi)

tstatistic

Pvalue

Case a
Case b
Case c
Case d

-1230.7
-788.8
-716.0
1320.0

-1.079
-0.910
-1.000
1.748

0.282
0.364
0.319
0.082

95% confidence
interval for the
difference (psi)
Lower
Upper
-3477.9
1016.5
-2500.0
922.4
-2133.2
701.3
-171.9
2813.9

Statistically
similar?
Yes
Yes
Yes
Yes

4.7 COMPARISON BETWEEN LABORATORY AND BACKCALCULATED
GRANULAR LAYER MODULI
Some of the most commonly used aggregate in the granular layer include crushed concrete,
natural gravel, and dolomite. As stated earlier, the results from the laboratory tests conducted on
unbound granular materials by researchers at the Michigan Technological University were used
to compare the laboratory measured and the backcalculated modulus values. The resilient
modulus of the granular materials is stress dependent. For a given interstate pavement section in
the State of Michigan, the estimated principal stresses (vertical and radial) at the center of 6–inch
base layer due to a 9000-pound (one side of a standard single axle load) are 12 and 2 psi
respectively. Since some of the laboratory tests were not conducted at the same stress boundary
conditions, the laboratory modulus corresponding to principal stresses of 12 and 3 psi only were
used for comparison purposes. The mean of the laboratory determined moduli for each aggregate
type is presented in Figure 4.32. Statistical t-tests were conducted on all means using 95%
confidence level. The results indicate that the laboratory determined aggregate base modulus
values except those for the dolomite aggregate, are statistically similar and represent similar
population.

128

Average Laboratory Granular layer
Modulus (ksi)

30
25
20
15
10
5
0
Crushed
Concrete Dense

Dolomite Open

Natural Gravel Natural Gravel
- Dense
- Open

Material Type - Gradation
Figure 4.32 Laboratory measured resilient modulus of various granular materials

For flexible pavements in three layered system, the average of 120 backcalculated modulus
values of dense graded natural gravel base layer of the four analyses cases and the average
laboratory determined dense graded natural gravel base modulus are listed in Table 4.23. It
should be noted that MTU conducted laboratory tests on different aggregate types, however, in
this study, information regarding one aggregate type only were available. Hence, the laboratory
determined and the backcalculated modulus values for one aggregate type are listed in Table
4.23. The data in the table indicate that the average backcalculated modulus value is about 4 to 5
times higher than the laboratory obtained value depending on the analysis case. This was
expected although the ratio is slightly higher than the 2 to 3 reported in the literature. One reason
for the slightly higher ratio is that the FWD tests; were dense natural gravel was and still is the
base material, were conducted in Grand region only. The source from which MTU obtained their
aggregate is stated in their report as from selected quarries. Nevertheless, no additional

129

information regarding the type of aggregate base are available to compare the backcalculated and
the laboratory determined modulus value. Further, Table 4.24 provides a list of the averages of
the granular layer modulus obtained from 2-layered system analysis and the average laboratory
modulus of the base. The ratios between the two sets of data vary from 2.2 to 2.4 depending on
the analysis case. These ratios are more or less parallel to those reported in the next section
(Table 4.25) for rigid pavements.
Table 4.23 Summary of backcalculated and laboratory determined base layer modulus for
flexible pavement

Material Type

Case 1
Case 2
Case 3
Case 4

Average
backcalculated
Modulus (ksi)
67.0
65.5
59.2
57.8
Average

Average
Laboratory
Modulus (ksi)
13.3
13.3
13.3
13.3

Ratio of
Backcalculated
and Laboratory
Modulus
5.1
4.9
4.5
4.4
4.75

Table 4.24 A summary of backcalculated and laboratory determined granular layer modulus for
flexible pavements
Ratio of
Backcalculated
and Laboratory

Average
backcalculated

Average
Laboratory

Modulus (ksi)

Modulus (ksi)

Case 1

32.2

13.3

2.4

Case 2

31.6

13.3

2.4

Case 3

29.8

13.3

2.3

Case 4

28.7

13.3

2.2

Analysis Cases

Modulus

A typical cross section of rigid pavement consists of a concrete slab, very thin aggregate base (46 inches) and a thick sand subbase (9 – 24 inches) supported by roadbed soil. Because of the
thickness ratio, the modulus of the subbase layer tends to have larger role on pavement response

130

to load than the base layer. Hence, the modulus of the subbase controls the composite modulus of
all materials between the concrete slab and the roadbed soils; the base layer has insignificant
impact on the granular layer modulus. Having said that and recall that all backcalculation of the
layer moduli for rigid pavements were conducted using the two layered system, the
backcalculated granular layer modulus represents the composite modulus of the base and subbase
layers combined. Hence, if the backcalculated granular layer modulus is compared to the
laboratory determined modulus of the base layer, one should expect the ratio between the two
modulus values to be similar to those reported in Table 4.25 for flexible pavements. Such
comparison was conducted and the results are listed in Table 4.26.
Table 4.25 Comparison of the backcalculated granular layer modulus with laboratory determined
base modulus for all analyses cases.
Average
Material
Type

Gradation

Average Backcalculated

Ratio of Backcalculated

Laboratory
Modulus
(ksi)

Modulus for all analyses
cases (ksi)

and Laboratory Modulus
for all analyses cases

Natural
Gravel

Dense

13.3

Natural
Gravel

Open

14.5

Dolomite

Open

21.7

Dense

15.7

Crushed
Concrete

1

2

3

4

1

2

3

4

36.5

33.8

32.3

27.9

2.8

2.6

2.4

2.1

36.4

35.1

34.4

29.3

2.5

2.4

2.4

2.0

39.7

37.6

36.8

32.3

1.8

1.7

1.7

1.5

34.4

34.1

33.9

31.3

2.2

2.2

2.2

2.0

2.3

2.2

2.2

1.9

Average ratio

4.8 EQUIVALENT GRANULAR LAYER RESILIENT MODULUS
In general, a typical flexible pavement section consists of a surface (HMA) layer, base layer, and
subbase layer supported by the roadbed soil. Most DOTs including MDOT specifies the
aggregate type, gradation and density and other requirements in its construction proposals.

131

Occasionally, most of the DOT’s including the MDOT use a form of Equation 4.1 to convert the
base and subbase modulus into an equivalent granular layer modulus, which can also be referred
to as the weighted average modulus.

Eg 
Where,

Tb Eb   Tsb Esb 
Tb  Tsb

Equation 4.1

Eg = equivalent granular layer modulus (psi)
Tb = thickness of base layer (in)
Eb = modulus of the base layer (psi)
Tsb = thickness of the subbase layer (in)
Esb = modulus of the subbase layer (psi)

At the outset, it should be noted that, in general, the modulus of the granular layer (the composite
modulus of the base and subbase layers) should be less than the base layer and greater than the
subbase layer. This scenario was true for all of the backcalculated moduli in this study.
Recall that, in this study, the deflection data measured along each flexible pavement section was
used to backcalculate the moduli of the asphalt concrete, the aggregate base, the sand subbase
and the roadbed soils using three layered analysis. The same deflection data were also used to
backcalculate the moduli of the asphalt concrete, the granular layer and the roadbed soils using
two layered system. The backcalculated moduli of the base and subbase layers from the three
layered system were then used as inputs to Equation 4.1 and the equivalent granular layer moduli
(Eg) were calculated. The average error, calculated as the ratio of the difference between the
granular layer moduli from two and three layer system to granular layer moduli from the two

132

layer system, for analysis cases 3 and 4 (where most of the possible outliers are eliminated) is 10
and 9 percent respectively.
In order to reduce the error a correction factor α was introduced to the modulus of the base layer
and the equation 4.1 was modified to the one shown in Equation 4.2.

Eg
Where,

 Tb Eb   Tsb Esb 

Tb  Tsb

Equation 4.2

α = correction factor for the base modulus = 0.825

The value of the correction factor α was determined by trial and error with the objective to
minimize the cumulative error between the values of Eg and the backcalculated granular layer
moduli. For each deflection basin, the error was defined as the ratio of the difference between
the backcalculated granular layer modulus and Eg to the backcalculated granular layer modulus.
The cumulative error was calculated as the sum of the error of all backcalculated deflection
basins. The objective of the analysis was accomplished when the correction factor α was
assigned a value of 0.825.
Figures 4.33 through 4.36 show that for all four cases of analysis, the relationship between the
backcalculated granular layer modulus using the two layered system and the Eg values estimated
using Equation 4.2. Examination of the data depicted in Figures 4.33 through 4.36 indicates that
the spread of the data points around the line of equality decreases as more outliers are eliminated.
Stated differently, the spread of the data decreases from analysis case 1 to analysis case 2 to
analysis case 3 and finally to analysis case 4. Indeed, for case 3 analyses and case 4 analyses, the
spread in the data is so insignificant that one can conclude that the two sets of data are almost the
same. The average error dropped for both cases 3 and 4 dropped to 5 percent from the average

133

error 10 and 9 percent reported earlier using Equation 4.1. Such error is smaller than a typical
error incurred in the measurement or estimation of the thicknesses of the aggregate base and sand

Backcalculated Granular Layer
Modulus from Two Layer System
(ksi)

subbase.
180
150
120
90
60
30
0
0

30

60

90

120

150

180

Equivalent Granular Layer Modulus from Three Layer
System (using Equation 4.2) (ksi)

Backcalculated Granular Layer
Modulus from Two Layer System(ksi)

Figure 4.33 Comparison between equivalent and backcalculated granular layer resilient modulus
for all tests, case 1
80

60

40

20

0
0

20

40

60

80

Equivalent Granular Layer Modulus from Three Layer System
(using Equation 4.2) (ksi)
Figure 4.34 Comparison between equivalent and backcalculated granular layer resilient modulus
for after deleting the upper and lower 10% of the backcalculated moduli, case 2

134

Backcalculated Granular Layer Modulus from
Two Layer System (ksi)

80

60

40

20

0
0

20

40

60

80

Equivalent Granular Layer Modulus from Three Layer System
(using Equation 4.2) (ksi)

Backcalculated Granular Layer Modulus
from Two Layer System (ksi)

Figure 4.35 Comparison between equivalent and backcalculated granular layer resilient modulus
for after deleting the upper and lower 20% of the backcalculated moduli, case 3
80

60

40

20

0
0

20

40

60

80

Equivalent Granular Layer Modulus from Three Layer System (using
Equation 4.2) (ksi)

Figure 4.36 Comparison between equivalent and backcalculated granular layer resilient modulus
th
for all values less than the 75 Percentile value for the backcalculated modulus, case 4

135

CHAPTER 5
SUMMARY, CONCLUSIONS AND RECOMMENDATIONS
5.1 SUMMARY
The new M-E PDG, the 1993 AASHTO Pavement Design Guide, and some other existing
pavement design procedures require the resilient modulus of the pavement materials (surface,
base and subbase layers) and the roadbed soils as input. The resilient modulus of granular
materials can be determined by using many methods including backcalculation using deflection
data, laboratory cyclic load tests, and from correlations with California Bearing Ratio (CBR),
Dynamic Cone Penetrometer (DCP) index etc. The M-E PDG design level 1 requires, as inputs,
the resilient modulus values determined from either backcalculation or from laboratory tests.
In this study, FWD measured deflections data were used to backcalculate the modulus of the
base and subbase layers. Deflections at the surface of the pavement are measured at distances of
0, 8, 12, 18, 24, 36 and 60 inches from the center of the application of a 9000 pound load. All
deflection data used in this study were provided by MDOT. The FWD tests were conducted over
the last 20 years period. The MICHBACK software was used to backcalculate the moduli of the
base and subbase layers and the roadbed soils for both rigid and flexible pavements. For rigid
pavement, the pavement layer moduli were backcalculated using two layered system (PCC slab
and granular base) and the roadbed soils. For flexible pavements, two (asphalt surface and
granular base) and three (asphalt surface, granular base, and sand subbase) layered systems were
used.
Some of the flexible pavement sections, at the time of the FWD tests, consist of a layer of
crushed asphalt on top of the aggregate base. Unfortunately, the thickness of the crushed asphalt
layer is not known, hence, its thickness was assumed to be the same as that of asphalt surface

136

layer. Information regarding the aggregate base type and gradation were provided by MDOT.
The most common material types used by MDOT include natural gravel, crushed concrete, and
dolomite. Aggregates could be either open or dense graded depending on the project
requirements.
5.2 CONCLUSIONS
Based upon the FWD test results and the backcalculated layer moduli and on the existing and
future pavement design procedures, the following conclusions were drawn:


The average modulus value of the granular layer (combination of the aggregate base and
sand subbase) is independent of the material type.



Backcalculation of the pavement layer moduli using three layered system produces some
unreasonable results (high aggregate base and sand subbase moduli).



Backcalculation of the roadbed soil modulus using two or three layered system produces
almost the same results.



The backcalculated modulus values of the roadbed soils are independent of the pavement
types.



For some flexible pavement sections, backcalculation of the pavement layers using three
layered systems produce unreasonably high or low modulus values. The average modulus
value of the 75 percentile modulus values tends to reduce the number of outliers
considerably. Whereas, backcalculation using two layered system produces more
consistent and reasonable results.



For rigid pavements, existing empirical backcalculation procedures yield highly variable
and unreasonable modulus values for the granular layers. The MICHBACK software
produces consistent and reasonable results.

137



For rigid pavements, the use of three layer system in the backcalculation may cause more
than ten fold error in the backcalculated layer moduli.



The average backcalculated base layer modulus is about four times higher than the
average laboratory estimated value.



The backcalculated moduli of the granular layer under rigid and flexible pavements are
found to be statistically similar.



The unbound granular layer moduli have little impact on the PCC surface thickness and
significant impact on the asphalt surface layer thickness.



The backcalculated moduli for dense and open graded granular bases were found to be
similar.



Equation 5.1 could be used to combine the moduli of the base and subbase layers into one
equivalent granular modulus.

Eg

  0.825Tb Eb   Tsb Esb 

Tb  Tsb

Where, EG = equivalent granular layer modulus (psi)
Tb = thickness of base layer (in)
Eb = modulus of the base layer (psi)
Tsb = thickness of the subbase layer (in)
Esb = modulus of the subbase layer (psi)

138

Equation 5.1

5.3 RECOMMENDATIONS
Based on the results and the conclusions of the study it is strongly recommended that:


In the design of flexible pavement sections using design levels 2 or 3 of the M-E PDG or
the AASHTO 1993 Design Guide, the materials beneath the HMA surface layer should
consists of the following two layers:
1. Layer 1 – An aggregate base whose modulus value is 33,000 psi and minimum
thickness of 6-inch. The corresponding layer coefficient is 0.148.
2. Layer 2 – The aggregate base be supported by a sand subbase whose modulus is
20,000 psi and thickness of 30-inch minus the combines thicknesses of the
aggregate base and HMA layers. The corresponding layer coefficient is 0.137.
The drainability of both layers should be good to very good, which correspond to a
minimum AASHTO drainage coefficient of 1.1. The drainage coefficient could be
increased if the drainage time is shortened by installing edge or other means of drain.
The total thickness of the aggregate base and sand subbase could be decreased to a
minimum of 18-inch, if the drainage coefficient could be increased to 1.2.
The use of crushed (angular) aggregate base and sand subbase is highly recommended.
Higher angularity enhances the material drainability and increases the material strength
and stiffness.



In the design of rigid pavement sections using design levels 2 or 3 of the M-E PDG or the
AASHTO 1993 Design Guide, the materials beneath the PCC slab could be either:
1. An aggregate base layer whose modulus value is 33,000 psi and minimum
thickness of 6-inch. Supported by sand subbase whose modulus value is 20,000
psi and thickness of 30-inch minus the combined thickness of the slab and the

139

aggregate base layer.
2. A granular layer made up of aggregate and sand mix whose composite modulus
value is 25,000 psi and thickness of 30-inch minus the thickness of the PCC slab.
3. A sand subbase whose modulus value is 20,000 psi and thickness of 30-inch
minus the thickness of the PCC slab.
The drainability of the materials should be good to very good, which correspond to a
minimum AASHTO drainage coefficient of 1.1. The drainage coefficient could be
increased if the drainage time is shortened by installing edge or other means of drain.
The total thickness of the aggregate base and sand subbase could be decreased to a
minimum of 18-inch, if the drainage coefficient could be increased to 1.2.
The use of crushed (angular) aggregate base and sand subbase is highly recommended.
Higher angularity enhances the material drainability and increases the material strength
and stiffness.
For the design of flexible or rigid pavement sections using Design level 1 of the M-E
PDG, it is recommended that:
For an existing pavement structure where the PCC slabs or the HMA surface will
be replaced, FWD tests be conducted every 500 feet along the project and the
deflection data be used to backcalculate the moduli of the aggregate base and sand
subbase or the granular layer. The modulus values to be used in the design should
correspond to the 33 percentile of all values.


For a total reconstruction, the aggregate base and sand subbase or the granular layer be
subjected to cyclic load triaxial tests to determine their modulus values. The design
modulus should be twice the average laboratory determined modulus.

140



The composite modulus or the equivalent modulus of a granular layer (combined
aggregate base and sand subbase) be estimated using Equation 5.1.



Additional FWD tests and backcalculation analyses shall be conducted when information
regarding the types of the aggregate bases under rigid and flexible pavements become
known.



MDOT should keep all information regarding the various pavement layers. The
information shall include the mix design parameters of the HMA and the PCC, the type,
source, gradation and angularity of the aggregate and the subbase material type, source,
gradation and angularity. The above information should be kept in easily searchable
electronic files.

141

APPENDICES

142

Appendix A

143

Table A.1 Backcalculated Pavement Layer Moduli for Rigid Pavement (Two – Layer System)

File Title
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997
rigid-B-I475-CS25132-06-26-1997

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
11.34 10.14 9.55 8.66 7.82 6.18 3.76 0.69
500
9.13 8.24 7.76 7.03 6.39 5.00 2.97 0.70
500
11.30 10.10 9.55 8.66 7.83 6.18 3.75 0.72
500
7.45 6.67 6.30 5.68 5.04 3.98 2.31 0.73
500
9.24 8.31 7.79 7.06 6.40 5.03 3.02 0.75
500
10.09 9.00 8.44 7.68 6.89 5.38 3.20 0.75
500
9.93 8.85 8.36 7.61 6.80 5.33 3.14 0.78
500
6.83 6.19 5.81 5.24 4.72 3.74 2.28 0.78
500
9.18 8.21 7.76 7.03 6.36 5.01 2.99 0.79
500
8.46 7.65 7.14 6.49 5.88 4.69 2.84 0.80
500
10.24 9.12 8.58 7.72 6.92 5.41 3.12 0.82
500
13.72 12.04 11.08 9.84 8.69 6.60 3.69 0.83
500
7.71 6.88 6.51 5.81 5.20 4.06 2.35 0.84
500
11.58 10.33 9.76 8.74 7.91 6.17 3.59 0.84
500
10.09 8.98 8.49 7.63 6.87 5.36 3.10 0.85
500
11.73 10.47 9.84 8.85 7.99 6.24 3.60 0.89
500
7.56 6.74 6.30 5.65 5.06 4.01 2.35 0.91
500
13.79 12.04 11.16 9.87 8.79 6.70 3.81 0.92
500
10.34 9.07 8.38 7.44 6.59 5.07 2.86 0.95
500
11.62 10.33 9.71 8.81 7.93 6.20 3.60 0.97
500
10.34 9.07 8.40 7.43 6.62 5.07 2.83 1.04
500
13.89 12.04 11.21 9.91 8.86 6.72 3.84 1.04
500
8.57 7.61 7.14 6.49 5.80 4.57 2.63 1.05
500
10.29 8.99 8.30 7.39 6.56 5.01 2.77 1.15
500
144

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
2,706
34
23
3,673
28
30
2,760
32
23
3,069
28
28
3,385
36
28
3,049
33
28
3,186
28
28
3,280
40
27
3,532
33
29
2,744
30
22
2,998
27
29
1,709
26
23
2,832
29
27
2,714
23
25
3,138
25
29
2,703
22
25
2,798
35
27
1,688
29
22
1,727
27
22
2,746
22
25
1,786
24
23
1,679
29
22
2,737
22
25
1,787
23
23

Table A.1 (Cont'd)

File Title
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I475-CS25132-06-24-2001
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.46 3.15 2.95 2.72 2.48 2.05 1.30 0.97
500
4.02 3.58 3.31 2.99 2.68 2.13 1.26 1.07
500
3.70 3.31 3.07 2.83 2.52 2.05 1.26 1.09
500
3.70 3.31 3.07 2.80 2.56 2.05 1.26 1.18
500
4.29 3.86 3.54 3.15 2.87 2.24 1.30 1.23
500
4.06 3.62 3.35 3.03 2.72 2.20 1.30 1.37
500
3.82 3.43 3.19 2.91 2.72 2.24 1.46 1.38
500
4.33 3.78 3.46 3.03 2.68 2.05 1.10 1.42
500
4.76 4.17 3.86 3.50 3.15 2.52 1.50 1.48
500
4.61 4.13 3.86 3.54 3.27 2.72 1.73 1.50
500
6.02 5.24 4.69 4.17 3.66 2.83 1.57 1.61
500
5.98 5.20 4.69 4.13 3.66 2.83 1.57 1.61
500
5.98 5.24 4.69 4.17 3.66 2.80 1.50 1.65
500
6.06 5.28 4.69 4.17 3.70 2.80 1.54 1.69
500
5.04 4.29 3.94 3.43 2.99 2.28 1.18 1.84
500
9.49 8.15 7.40 6.46 5.71 4.29 2.20 1.85
500
4.72 4.21 3.86 3.46 3.11 2.52 1.42 1.93
500
6.38 5.51 4.96 4.37 3.90 2.99 1.61 2.00
500
4.06 3.50 3.23 2.83 2.48 1.97 1.06 2.07
500
4.06 3.46 3.19 2.80 2.48 1.93 1.02 2.19
500
6.14 5.24 4.69 4.17 3.66 2.80 1.46 2.28
500
6.42 5.47
5
4.41 3.86 2.99 1.77 0.51
250
6.57 5.55
5
4.41 3.86 2.99 1.77 0.67
250
6.42 5.47 4.96 4.41 3.82 2.99 1.77 0.71
250
145

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
4,336
54
27
2,902
45
29
3,290
57
28
3,423
54
28
2,707
36
28
3,005
44
28
3,257
87
23
2,344
33
34
2,401
43
24
3,007
56
20
1,478
34
23
1,501
34
23
1,593
26
24
1,481
31
23
1,912
29
32
1,029
14
17
2,653
30
26
1,432
28
22
2,525
41
35
2,524
37
37
1,488
27
25
1,045
64
15
906
67
15
1,009
66
15

Table A.1 (Cont'd)

File Title
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
6.5 5.67 5.24 4.65 4.06 3.11 1.69 0.87
250
7.99 6.85 6.22 5.47 4.76 3.58 1.93 0.96
250
7.01 6.02 5.51 4.88 4.21 3.23 1.77 1.00
250
7.17 6.18 5.63 4.96 4.33 3.31 1.81 1.01
250
6.97 5.91 5.39 4.8 4.17 3.23 1.85 1.03
250
7.17 6.18 5.63 4.96 4.29 3.31 1.81 1.06
250
7.09 6.06 5.47 4.88 4.21 3.27 1.85 1.09
250
6.54 5.55 4.96 4.41 3.82 2.99 1.73 1.10
250
9.29 8.07 7.32 6.42 5.55 4.21 2.2 1.11
250
9.21 7.91 7.24 6.34 5.47 4.09 2.09 1.11
250
7.17 6.14 5.63 4.96 4.29 3.31 1.81 1.11
250
7.95 6.81 6.18 5.47 4.72 3.62 1.97 1.13
250
6.3 5.39 4.88 4.29 3.66 2.8 1.5 1.14
250
9.76 8.27 7.56 6.54 5.59 4.09 2.01 1.15
250
7.09 6.06 5.51 4.92 4.25 3.27 1.81 1.16
250
6.34 5.39 4.88 4.33 3.7 2.8 1.5 1.16
250
6.54 5.71 5.24 4.69 4.09 3.15 1.69 1.17
250
6.38 5.47 4.96 4.41 3.82 3.03 1.73 1.26
250
7.91 6.81 6.18 5.43 4.72 3.62 1.93 1.30
250
6.73 5.67 5.2 4.53 3.86 2.8 1.34 1.35
250
8.11 6.81 6.18 5.43 4.65 3.54 1.89 1.35
250
7.36 6.26 5.67 4.96 4.17 3.11 1.54 1.36
250
6.73 5.67 5.2 4.53 3.9 2.83 1.38 1.36
250
8.15 6.85 6.18 5.47 4.72 3.54 1.89 1.36
250
146

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,527
33
18
984
32
15
1,176
38
16
1,138
38
16
1,017
51
15
1,116
39
16
1,020
48
15
957
62
15
905
23
13
932
20
14
1,101
39
15
983
34
14
1,202
43
19
835
18
14
1,115
41
15
1,231
41
19
1,583
30
18
1,131
58
16
1,024
31
14
1,283
23
23
883
35
15
1,103
27
19
1,302
23
22
895
34
15

Table A.1 (Cont'd)

File Title
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
6.93 5.87 5.35 4.76 4.17 3.23 1.81 1.38
250
6.5 5.67 5.2 4.57 4.02 3.11 1.65 1.39
250
7.32 6.22 5.63 4.92 4.17 3.11 1.54 1.42
250
6.1 5.16 4.69 4.13 3.54 2.64 1.34 1.43
250
6.14 5.16 4.65 4.13 3.54 2.6 1.34 1.43
250
7.56 6.38 5.75
5
4.29 3.19 1.61 1.44
250
6.26 5.31 4.84 4.25 3.66 2.76 1.42 1.44
250
8.07 6.73 6.14 5.31 4.53 3.27 1.57 1.45
250
8.11 6.81 6.14 5.47 4.65 3.5 1.85 1.45
250
6.73 5.71 5.2 4.53 3.9 2.83 1.34 1.46
250
7.01 5.91 5.39 4.72 4.13 3.03 1.54 1.52
250
7.17 6.06 5.47 4.76 4.13 3.03 1.5 1.56
250
7.8 6.57 5.94 5.16 4.45 3.27 1.61 1.56
250
8.07 6.77 6.1 5.31 4.49 3.31 1.61 1.57
250
6.18 5.28 4.72 4.17 3.62 2.76 1.46 1.58
250
7.56 6.34 5.71 5.04 4.29 3.19 1.61 1.61
250
6.18 5.28 4.76 4.21 3.66 2.76 1.42 1.62
250
8.07 6.77 6.1 5.28 4.45 3.23 1.5 1.62
250
6.1 5.12 4.65 4.09 3.5 2.6 1.3 1.62
250
7.17 6.02 5.39 4.76 4.09 3.03 1.54 1.66
250
6.14 5.28 4.76 4.21 3.62 2.72 1.34 1.66
250
7.05 5.91 5.39 4.72 4.09 2.99 1.46 1.73
250
7.4 6.22 5.59 4.96 4.17 3.11 1.54 1.73
250
6.77 5.75 5.2 4.57 3.9 2.95 1.46 1.79
250
147

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,076
47
15
1,518
32
18
1,122
27
19
1,372
33
22
1,288
36
22
1,010
29
18
1,313
35
20
988
21
19
905
32
15
1,341
21
23
1,203
28
19
1,130
26
19
1,057
24
18
953
24
18
1,260
42
19
996
29
17
1,377
35
20
982
20
20
1,338
33
22
1,039
32
18
1,484
27
22
1,228
24
20
1,085
27
19
1,295
28
21

Table A.1 (Cont'd)

File Title
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-10-24-2003
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.2 6.02 5.43 4.8 4.09 3.03 1.5 1.79
250
7.13 5.94 5.43 4.76 4.13 3.03 1.5 1.82
250
6.73 5.71 5.16 4.57 3.86 2.91 1.42 1.83
250
7.83 6.61 5.98 5.2 4.49 3.31 1.57 1.89
250
8.98 7.4 6.69 5.94 5.16 3.9 2.09 1.90
250
7.56 6.34 5.71 5.08 4.37 3.27 1.65 1.92
250
7.6 6.38 5.75 5.08 4.33 3.23 1.57 1.97
250
7.48 6.3 5.67 5.04 4.33 3.23 1.57 2.08
250
7.8 6.61 5.94 5.2 4.45 3.31 1.54 2.11
250
6.77 5.75 5.2 4.57 3.86 2.95 1.42 2.12
250
7.52 6.26 5.71 5.04 4.33 3.27 1.61 2.20
250
8.94 7.36 6.61 5.91 5.12 3.94 2.05 2.53
250
6.57 5.24 4.8 4.29 3.74 2.91 1.57 2.86
250
6.65 5.55 5.08 4.57 4.02 3.19 1.65 2.93
250
5.35 4.88 4.53 4.06 3.7 3.03 1.85 1.05
250
5.35 4.88 4.53 4.02 3.7 2.99 1.81 1.15
250
6.38 5.51 4.96 4.25 3.74 2.8 1.46 1.35
250
6.54 5.59 5.08 4.37 3.9 2.95 1.61 1.35
250
5.31 4.84 4.45 4.02 3.66 2.99 1.77 1.38
250
6.3 5.47 4.88 4.25 3.7 2.8 1.46 1.41
250
6.42 5.35 4.8 4.09 3.58 2.64 1.38 1.43
250
9.13 7.91 7.2 6.22 5.51 4.17 2.17 1.47
250
11.34 9.76 8.9 7.64 6.73 5.12 2.68 1.48
250
9.88 8.46 7.64 6.57 5.75 4.29 2.17 1.51
250
148

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,097
28
19
1,187
26
19
1,319
26
21
1,145
20
19
1,050
44
18
1,144
28
18
1,084
24
18
1,211
23
19
1,152
19
20
1,303
26
21
1,180
26
19
867
29
13
953
59
17
1,413
35
17
2,194
59
15
2,190
55
15
1,194
37
19
1,148
45
17
2,340
49
16
1,234
37
19
1,005
44
20
957
23
13
701
20
10
802
21
13

Table A.1 (Cont'd)

File Title
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.17 5.94 5.43 4.72 4.25 3.35 1.97 1.55
250
6.34 5.47 4.96 4.25 3.74 2.83 1.46 1.55
250
6.61 5.63 5.08 4.33 3.82 2.87 1.5 1.55
250
6.5 5.55 5.08 4.37 3.9 2.95 1.57 1.56
250
10.55 9.17 8.39 7.28 6.42 4.88 2.48 1.56
250
6.57 5.59 5.08 4.33 3.9 2.91 1.57 1.57
250
8.82 7.64 6.93 5.98 5.28 4.02 2.09 1.58
250
6.46 5.39 4.84 4.13 3.58 2.68 1.38 1.60
250
6.81 5.75 5.16 4.41 3.9 2.95 1.57 1.65
250
6.69 5.67 5.12 4.33 3.82 2.91 1.54 1.71
250
7.36 6.3 5.67 4.88 4.25 3.23 1.65 1.72
250
6.1 4.92 4.49 3.86 3.46 2.68 1.54 1.81
250
6.42 5.35 4.8 4.06 3.54 2.64 1.34 1.81
250
6.93 5.94 5.35 4.61 4.06 3.03 1.5 1.85
250
7.24 5.98 5.43 4.72 4.25 3.35 1.93 1.86
250
6.93 5.94 5.31 4.57 4.06 3.03 1.54 1.89
250
6.81 5.75 5.2 4.41 3.94 2.99 1.57 1.99
250
7.4
6.3 5.67 4.88 4.25 3.23 1.61 2.02
250
7.32 6.26 5.63 4.84 4.25 3.23 1.61 2.10
250
6.06 4.92 4.45 3.86 3.46 2.68 1.5 2.14
250
7.24 5.98 5.47 4.72 4.29 3.39 1.93 2.19
250
6.93 5.91 5.35 4.53 4.02 2.95 1.38 2.21
250
6.93 5.94 5.35 4.57 4.02 2.99 1.38 2.33
250
7.36 6.14 5.51 4.72 4.17 3.15 1.57 2.46
250
149

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
810
68
13
1,275
35
19
1,089
40
19
1,231
39
18
893
16
12
1,109
44
18
965
24
13
1,009
43
20
981
44
17
1,032
44
18
1,017
32
17
893
75
17
1,006
42
21
1,208
27
19
807
65
14
1,138
31
18
1,039
41
17
1,056
29
17
1,109
28
18
915
72
17
834
63
14
1,250
21
21
1,300
19
22
984
33
18

Table A.1 (Cont'd)

File Title
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-05-26-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
10.04 8.58 7.91 7.05 6.42 5.08 2.76 2.48
250
7.48 6.22 5.59 4.76 4.25 3.23 1.65 2.53
250
7.72 6.34 5.67 4.84 4.25 3.19 1.57 2.62
250
7.4 6.14 5.51 4.72 4.21 3.19 1.61 2.64
250
8.07 6.57 5.91
5
4.45 3.35 1.69 2.70
250
8.94 7.17 6.5 5.59 4.96 3.74 1.93 2.71
250
8.07 6.57 5.91
5
4.49 3.35 1.69 2.78
250
7.68 6.3 5.63 4.8 4.25 3.19 1.57 2.79
250
8.07 6.57 5.91 4.96 4.45 3.35 1.69 2.84
250
13.86 12.13 11.14 9.69 8.54 6.57 3.66 0.80
250
9.84 8.62 7.99 7.01 6.34 4.92 2.87 0.93
250
9.88 8.58 7.99 7.01 6.3 4.92 2.87 0.97
250
16.81 14.72 13.54 11.8 10.3 7.6 3.86 1.00
250
14.02 12.2 11.22 9.8 8.58 6.54 3.46 1.07
250
9.92 8.62 7.99 6.97 6.3 4.96 2.91 1.12
250
17.8 15.51 14.17 12.4 10.9 8.27 4.33 1.14
250
10.51 9.21 8.5
7.4 6.57
5
2.64 1.16
250
10.47 9.17 8.43 7.32 6.5 4.96 2.64 1.20
250
17.6 15.08 13.94 12.1 10.5 7.8 3.9 1.26
250
10.47 9.17 8.43 7.32 6.5
5
2.68 1.27
250
6.69 5.63 5.16 4.49 3.98 3.03 1.69 1.27
250
10.08 8.62 7.91 6.89 6.1 4.57 2.4 1.37
250
9.25 7.91 7.2 6.22 5.43 4.13 2.17 1.37
250
10.51 9.02 8.19 7.01 6.1 4.57 2.32 1.38
250
150

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,036
23
10
963
35
17
883
32
18
971
34
17
791
36
16
727
35
14
819
34
16
891
33
17
784
36
16
596
19
7
905
32
9
906
32
9
810
13
11
654
15
8
834
36
9
515
11
7
928
18
11
894
19
11
743
13
11
881
21
11
1,085
49
16
861
21
12
840
27
13
751
20
12

Table A.1 (Cont'd)

File Title
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
10.12 8.66 7.91 6.89 6.1 4.57 2.4 1.39
250
10.87 9.33 8.5 7.32 6.46 4.8 2.44 1.43
250
7.44 6.34 5.71 4.84 4.21 3.07 1.5 1.46
250
7.01 6.02 5.47 4.69 4.09 3.11 1.61 1.48
250
10.91 9.37 8.54 7.32 6.5 4.84 2.48 1.52
250
10.04 8.58 7.87 6.81 6.02 4.57 2.4 1.52
250
10.51 9.02 8.15 6.97 6.14 4.57 2.32 1.54
250
10.91 9.37 8.54 7.36 6.5 4.84 2.44 1.54
250
7.09 6.02 5.51 4.69 4.13 3.11 1.61 1.57
250
10.55 9.02 8.19 7.01 6.14 4.57 2.28 1.58
250
7.48 6.38 5.71 4.88 4.25 3.15 1.57 1.62
250
13.46 11.57 10.63 9.17 8.07 6.02 2.95 1.63
250
8.03 6.97 6.34 5.43 4.76 3.58 1.77 1.64
250
7.68 6.54 5.91 5.08 4.45 3.31 1.65 1.69
250
9.17 7.87 7.13 6.1 5.39 4.13 2.17 1.72
250
8.07 6.97 6.3 5.43 4.76 3.58 1.77 1.76
250
7.52 6.42 5.75 4.92 4.29 3.19 1.57 1.80
250
6.69 5.59 5.12 4.41 3.94 2.99 1.61 1.82
250
7.09 6.02 5.47 4.69 4.13 3.11 1.57 1.86
250
9.21 7.87 7.17 6.14 5.43 4.17 2.17 1.86
250
9.09 7.72 7.01 5.91 5.2 3.86 1.89 1.91
250
11.14 9.53 8.54 7.28 6.38 4.72 2.28 1.92
250
9.13 7.76 7.01 5.91 5.2 3.86 1.89 1.96
250
7.76 6.61 5.98 5.12 4.53 3.39 1.69 1.96
250
151

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
840
22
12
776
18
12
1,017
26
19
1,112
34
18
767
18
11
840
23
12
753
20
12
791
17
12
1,089
34
18
773
19
13
1,002
28
18
713
11
10
1,114
21
17
1,049
26
17
841
28
13
1,065
22
16
1,061
26
18
1,090
45
17
1,134
31
18
856
27
13
854
22
15
724
16
13
840
22
15
1,078
25
17

Table A.1 (Cont'd)

File Title
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-10-14-2004
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
10.94 9.37 8.35 7.2 6.26 4.65 2.2 2.08
250
8.94 7.68 6.85 5.91 5.12 3.78 1.73 2.11
250
6.65 5.55 5.12 4.41 3.94 3.03 1.61 2.13
250
10.98 9.41 8.35 7.17 6.26 4.65 2.2 2.21
250
8.94 7.64 6.85 5.87 5.08 3.78 1.73 2.25
250
8.07 6.97 6.26 5.39 4.72 3.58 1.69 2.36
250
8.11 6.93 6.26 5.39 4.76 3.58 1.69 2.42
250
14.29 11.69 10.87 9.53 8.39 6.38 3.27 2.51
250
9.57 7.8 7.13 6.18 5.55 4.33 2.36 2.53
250
8.9
7.6 6.81 5.83 5.08 3.78 1.69 2.54
250
8.62 7.17 6.5 5.59 4.96 3.74 1.85 2.55
250
8.62 7.17 6.54 5.63
5
3.78 1.85 2.65
250
9.57 7.76 7.09 6.14 5.51 4.33 2.36 2.68
250
8.74 7.28 6.57 5.67 5.04 3.82 1.89 2.69
250
9.61 7.76 7.13 6.14 5.55 4.33 2.36 2.73
250
10.2 8.19 7.4 6.38 5.63 4.25 2.17 2.74
250
15.24 12.28 11.22 9.84 8.66 6.54 3.31 2.87
250
6.5 5.67 5.31 4.72 4.21 3.39 2.09 0.67
250
5.63 4.96 4.61 4.09 3.7 3.03 1.93 0.70
250
5.87 5.16 4.8 4.21 3.78 2.95 1.69 0.94
250
5.47 4.84 4.53 4.06 3.62 2.87 1.65 0.96
250
5.83 4.96 4.61 4.02 3.5 2.72 1.54 0.98
250
6.57 5.75 5.35 4.72 4.25 3.43 2.09 0.98
250
5.87 4.96 4.61 4.02 3.54 2.68 1.5 1.04
250
152

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
770
15
13
998
15
18
1,197
41
17
749
15
13
969
16
17
1,152
18
18
1,135
18
18
599
16
9
673
40
11
1,031
13
18
945
25
15
989
23
15
681
40
11
951
24
15
658
41
11
634
30
12
500
17
8
1,301
67
13
1,428
93
13
1,639
47
17
2,142
45
18
1,312
58
18
1,277
65
13
1,342
53
19

Table A.1 (Cont'd)

File Title
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.2 6.18 5.75 5.04 4.45 3.5 2.01 1.08
250
6.54 5.75 5.35 4.72 4.25 3.35 1.93 1.09
250
7.24 6.38 5.91 5.12 4.57 3.62 2.09 1.11
250
7.2 6.22 5.83 5.08 4.45 3.5 1.97 1.13
250
7.2 6.22 5.79
5
4.45 3.5 2.01 1.13
250
5.2 4.53 4.21 3.7 3.31 2.64 1.54 1.16
250
6.65 5.83 5.43 4.8 4.33 3.39 1.93 1.18
250
5.87
5
4.61 4.02 3.54 2.72 1.5 1.20
250
6.02 5.12 4.69 4.06 3.54 2.68 1.42 1.24
250
5.91 5.2 4.84 4.25 3.82 3.03 1.73 1.25
250
7.01 6.06 5.63 4.92 4.41 3.46 1.97 1.28
250
5.98 5.2 4.84 4.25 3.82 2.99 1.69 1.29
250
7.48 6.38 5.94 5.12 4.53 3.35 1.73 1.29
250
6.06 5.12 4.72 4.06 3.54 2.68 1.42 1.30
250
6.69 5.83 5.47 4.84 4.33 3.43 1.93 1.39
250
7.48 6.38 5.94 5.16 4.49 3.39 1.73 1.42
250
7.44 6.34 5.94 5.12 4.49 3.35 1.69 1.43
250
5.47 4.8 4.53 4.02 3.62 2.91 1.65 1.54
250
6.1 5.16 4.72 4.09 3.58 2.72 1.42 1.60
250
5.55 4.84 4.57 4.09 3.7 2.99 1.73 1.64
250
7.28 6.14 5.67 4.88 4.25 3.11 1.46 1.78
250
6.89 5.79 5.24 4.49 3.94 2.95 1.5 1.82
250
5.47 4.65 4.37 3.78 3.35 2.6 1.38 1.82
250
7.17 6.22 5.75
5
4.41 3.39 1.69 1.84
250
153

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,132
48
14
1,545
44
15
1,175
46
13
1,203
41
14
1,119
48
14
1,727
67
18
1,576
39
15
1,375
51
19
1,342
43
21
1,682
48
16
1,263
44
14
1,612
46
17
1,240
25
17
1,301
44
20
1,608
37
15
1,229
25
17
1,299
22
18
2,211
43
18
1,346
41
21
2,188
49
17
1,318
18
22
1,131
36
20
1,745
40
21
1,485
19
18

Table A.1 (Cont'd)

File Title
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-B-I675-CS73101-12-05-2005
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.39 4.65 4.33 3.78 3.35 2.6 1.34 1.85
250
5.51 4.72 4.37 3.82 3.35 2.6 1.34 1.87
250
5.31 4.61 4.29 3.74 3.35 2.6 1.34 1.92
250
7.24 6.1 5.63 4.84 4.21 3.11 1.46 1.93
250
6.34 5.16 4.72 4.09 3.58 2.72 1.46 1.94
250
7.17 6.22 5.75
5
4.41 3.43 1.73 1.97
250
6.38 5.16 4.72 4.13 3.62 2.76 1.5 2.08
250
7.2 6.22 5.71
5
4.41 3.43 1.69 2.28
250
6.46 5.2
4.8 4.13 3.66 2.76 1.46 2.37
250
7.36 6.14 5.75 5.04 4.57 3.58 1.85 2.94
250
5.28 4.72 4.33 3.86 3.43 2.68 1.57 0.41
200
5.28 4.69 4.29 3.82 3.39 2.68 1.57 0.69
200
8.03 6.77 6.06 5.2 4.41 3.15 1.5 0.95
200
3.98 3.58 3.39 2.99 2.72 2.17 1.26 0.99
200
9.72 8.5 7.87 7.01 6.18 4.72 2.48 1.07
200
8.03 6.73 6.02 5.16 4.37 3.11 1.46 1.10
200
3.94 3.54 3.35 2.99 2.68 2.17 1.22 1.22
200
7.91 6.65 6.02 5.31 4.65 3.5 1.89 1.25
200
8.27 6.97 6.3 5.47 4.72 3.54 1.81 1.30
200
8.66 7.28 6.61 5.75 5.04 3.74 1.93 1.37
200
9.8 8.35 7.6 6.69 5.79 4.21 2.01 1.38
200
8.03 6.73 6.02 5.2 4.37 3.15 1.46 1.38
200
9.88 8.66 7.91 7.09 6.22 4.84 2.56 1.39
200
9.8 8.39 7.64 6.69 5.79 4.25 2.01 1.43
200
154

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,948
32
22
1,811
34
22
2,108
27
23
1,324
18
21
1,046
54
19
1,494
21
18
1,018
57
19
1,558
17
19
1,041
51
19
1,484
26
16
1,761
66
16
1,713
69
16
885
27
17
3,210
62
20
1,128
20
11
881
26
18
3,460
50
21
909
42
13
891
35
14
884
33
13
951
16
13
911
25
18
1,033
24
10
968
16
13

Table A.1 (Cont'd)

File Title
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
8.07 6.81 6.22 5.47 4.76 3.62 1.89 1.47
200
11.14 9.49 8.66 7.64 6.65
5
2.52 1.50
200
6.42 5.47 5.08 4.45 3.94 3.03 1.61 1.50
200
6.42 5.47 5.08 4.45 3.94 3.03 1.61 1.50
200
8.15 6.93 6.3 5.59 4.88 3.74 1.97 1.54
200
7.44 6.3 5.75
5
4.37 3.31 1.69 1.56
200
9.76 8.54 7.8 6.93 6.18 4.76 2.48 1.58
200
12.32 10.59 9.61 8.54 7.36 5.47 2.6 1.59
200
7.44 6.3 5.75
5
4.41 3.31 1.69 1.60
200
10.59 9.06 8.23 7.24 6.3 4.72 2.32 1.60
200
9.69 8.27 7.56 6.65 5.71 4.25 2.01 1.61
200
8.31 6.97 6.3 5.47 4.72 3.58 1.81 1.68
200
8.31 7.05 6.46 5.67 4.96 3.78 1.93 1.68
200
8.07 6.81 6.26 5.43 4.72 3.62 1.85 1.69
200
12.44 10.67 9.72 8.58 7.44 5.51 2.56 1.72
200
6.42 5.47 5.08 4.45 3.9 3.03 1.57 1.75
200
7.44 6.26 5.75
5
4.33 3.27 1.61 1.79
200
12.13 10.2 9.29 8.11 6.93
5
2.2 1.82
200
7.44 6.3 5.79
5
4.41 3.39 1.73 1.90
200
10.63 9.06 8.19 7.24 6.3 4.76 2.32 1.96
200
10.83 9.25 8.46 7.48 6.34 4.84 2.28 2.00
200
10.83 9.29 8.39 7.4 6.38 4.84 2.28 2.07
200
7.36 6.22 5.71 4.96 4.29 3.27 1.57 2.08
200
7.44 6.26 5.71
5
4.33 3.27 1.57 2.09
200
155

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,000
35
13
817
20
10
1,412
42
16
1,410
42
16
1,029
34
13
1,100
36
15
1,110
21
11
811
12
10
1,109
35
15
884
19
11
969
17
13
892
35
14
1,022
31
13
997
34
14
821
10
11
1,440
39
16
1,168
29
16
770
10
13
1,142
36
15
887
19
11
876
16
12
906
15
12
1,243
26
17
1,221
26
17

Table A.1 (Cont'd)

File Title
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-08-15-2001
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999
rigid-BI75-CS73101-11-30-1999

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.87 6.65 6.1 5.31 4.65 3.66 1.89 2.15
200
10.91 9.25 8.43 7.48 6.38 4.88 2.28 2.30
200
7.95 6.5 5.94 5.28 4.61 3.5 1.81 2.30
200
7.95 6.5 5.94 5.24 4.61 3.5 1.77 2.53
200
7.95 6.5 5.94 5.28 4.65 3.5 1.77 2.55
200
3.70 3.43 3.23 3.03 2.72 2.24 1.34 0.68
100
3.90 3.74 3.54 3.31 3.07 2.48 1.54 0.76
100
3.46 3.23 3.07 2.91 2.60 2.13 1.30 0.77
100
3.43 3.19 3.03 2.87 2.56 2.09 1.26 0.79
100
3.62 3.43 3.23 3.03 2.72 2.20 1.30 0.81
100
3.66 3.39 3.19 3.03 2.72 2.20 1.34 0.88
100
6.89 6.26 5.67 5.04 4.33 3.07 1.42 0.92
100
6.81 6.26 5.71 5.04 4.29 3.03 1.42 1.41
100
11.50 10.39 9.41 8.15 6.77 4.49 1.85 1.71
100
10.28 9.13 8.31 7.20 5.91 3.90 1.61 1.78
100
11.34 10.28 9.37 8.15 6.73 4.49 1.85 1.81
100
11.38 10.31 9.29 8.19 6.73 4.49 1.85 1.83
100
10.39 9.21 8.31 7.24 5.98 3.94 1.69 1.92
100
9.69 8.62 7.80 6.93 5.63 3.70 1.50 1.99
100
10.24 9.13 8.27 7.24 5.91 3.94 1.69 2.02
100
9.72 8.70 7.87 7.01 5.71 3.74 1.50 2.04
100
9.61 8.70 7.87 6.97 5.71 3.74 1.50 2.06
100
9.09 8.19 7.36 6.34 5.12 3.23 1.22 2.40
100
9.09 8.23 7.40 6.42 5.16 3.27 1.22 2.41
100
156

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,033
37
13
906
14
12
1,000
38
14
1,004
36
14
1,028
34
14
4,963
87
8
6,484
43
7
6,064
76
9
5,988
73
9
5,903
54
9
5,076
86
8
1,475
31
9
1,455
32
9
731
15
7
777
19
8
771
14
7
764
14
7
735
22
8
882
18
9
765
22
8
927
15
9
954
14
9
859
17
11
904
15
12

Table A.1 (Cont'd)

File Title
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.06 3.66 3.43 3.11 2.80 2.28 1.42 0.83
700
6.22 5.31 4.88 4.37 3.90 3.07 1.93 1.04
700
6.89 5.91 5.35 4.76 4.21 3.23 1.93 1.08
700
5.67 5.00 4.57 4.02 3.58 2.80 1.61 1.25
700
6.06 5.20 4.80 4.29 3.82 3.07 1.89 1.33
700
5.71 4.96 4.61 4.06 3.58 2.80 1.57 1.39
700
7.05 6.10 5.59 4.96 4.41 3.43 1.97 1.42
700
6.06 5.20 4.80 4.29 3.82 3.11 1.93 1.42
700
6.89 5.98 5.47 4.92 4.33 3.39 1.93 1.51
700
7.20 6.10 5.55 4.92 4.29 3.27 1.81 1.61
700
5.83 5.08 4.65 4.09 3.66 2.83 1.57 1.61
700
6.69 5.71 5.20 4.65 4.06 3.23 1.89 1.65
700
5.94 5.08 4.61 4.09 3.54 2.76 1.54 1.65
700
6.61 5.59 5.16 4.53 4.02 3.11 1.77 1.70
700
7.68 6.50 5.91 5.20 4.53 3.46 1.89 1.70
700
6.50 5.59 5.20 4.61 4.13 3.27 1.89 1.75
700
6.81 5.75 5.28 4.65 4.09 3.19 1.81 1.77
700
6.93 5.98 5.51 4.92 4.33 3.43 1.93 1.78
700
6.61 5.55 5.12 4.53 4.09 3.31 2.05 1.80
700
7.32 6.02 5.47 4.76 4.17 3.15 1.77 1.81
700
7.32 6.06 5.51 4.84 4.17 3.19 1.77 1.81
700
5.87 4.96 4.57 4.02 3.50 2.72 1.50 1.82
700
6.61 5.55 5.08 4.53 4.06 3.31 2.05 1.85
700
6.57 5.71 5.24 4.69 4.21 3.35 1.93 1.85
700
157

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
3,275
51
28
1,323
59
20
1,150
43
20
1,796
35
25
1,440
58
20
1,852
30
26
1,389
30
20
1,412
64
20
1,526
28
21
1,243
28
22
1,826
28
26
1,270
43
20
1,476
38
25
1,362
35
22
1,133
26
21
1,641
33
21
1,259
36
21
1,542
27
21
1,133
64
18
1,001
37
22
1,051
34
22
1,597
35
27
1,098
67
18
1,644
31
20

Table A.1 (Cont'd)

File Title
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.83 4.92 4.53 3.98 3.50 2.68 1.46 1.86
700
6.50 5.63 5.20 4.65 4.13 3.31 1.89 1.88
700
7.48 6.18 5.63 4.92 4.29 3.27 1.81 1.94
700
6.61 5.67 5.12 4.53 3.98 3.15 1.77 2.00
700
7.28 6.22 5.67 5.04 4.41 3.43 1.85 2.02
700
7.20 6.06 5.51 4.88 4.25 3.27 1.77 2.04
700
7.09 6.02 5.51 5.00 4.49 3.62 2.20 2.04
700
7.13 6.06 5.55 4.92 4.29 3.35 1.81 2.07
700
7.17 6.10 5.55 4.92 4.29 3.35 1.81 2.11
700
7.24 5.98 5.43 4.72 4.09 3.07 1.61 2.13
700
7.13 6.02 5.51 5.00 4.49 3.62 2.20 2.14
700
7.91 6.65 6.14 5.55 5.08 4.13 2.60 2.16
700
7.17 5.94 5.39 4.69 4.06 3.07 1.61 2.17
700
6.61 5.51 5.04 4.45 3.90 3.07 1.73 2.18
700
7.28 6.10 5.51 4.80 4.17 3.15 1.61 2.26
700
6.93 5.71 5.28 4.65 4.06 3.11 1.69 2.27
700
6.65 5.51 5.08 4.45 3.94 3.11 1.77 2.28
700
7.76 6.57 6.10 5.51 5.04 4.17 2.60 2.32
700
6.93 5.79 5.28 4.69 4.13 3.27 1.85 2.33
700
7.36 6.22 5.67 5.16 4.61 3.74 2.24 2.35
700
6.73 5.67 5.16 4.61 4.06 3.23 1.81 2.42
700
6.97 5.75 5.31 4.65 4.06 3.15 1.69 2.49
700
7.72 6.54 6.06 5.47 4.96 4.17 2.56 2.56
700
7.20 5.94 5.43 4.80 4.21 3.27 1.77 2.61
700
158

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,623
32
27
1,695
30
21
1,049
32
21
1,320
37
22
1,369
23
22
1,260
27
22
1,280
48
17
1,396
24
22
1,357
25
22
1,129
26
24
1,224
49
17
1,068
54
14
1,138
26
24
1,254
40
22
1,193
22
24
1,279
30
23
1,230
42
22
1,165
54
14
1,197
40
21
1,269
42
17
1,370
36
21
1,290
29
23
1,157
54
14
1,197
31
22

Table A.1 (Cont'd)

File Title
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS6111-09-13-2001
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
6.93 5.59 5.12 4.57 3.98 3.19 1.85 2.67
700
6.73 5.43 4.96 4.41 3.86 3.11 1.81 2.69
700
6.73 5.39 4.92 4.41 3.90 3.11 1.81 2.96
700
4.10 3.69 3.50 3.26 3.03 2.53 1.71 0.82
175
5.10 4.67 4.36 4.06 3.69 2.99 1.78 0.92
175
3.97 3.61 3.44 3.19 2.92 2.40 1.46 0.95
175
3.58 3.30 3.15 2.96 2.72 2.26 1.37 0.99
175
4.04 3.70 3.51 3.31 3.02 2.55 1.63 1.00
175
3.98 3.61 3.44 3.22 2.89 2.34 1.35 1.05
175
4.04 3.66 3.51 3.28 3.00 2.50 1.56 1.08
175
4.15 3.73 3.54 3.30 3.06 2.53 1.64 1.09
175
5.12 4.63 4.37 4.04 3.68 2.98 1.74 1.10
175
3.90 3.48 3.26 3.03 2.75 2.22 1.35 1.12
175
5.10 4.70 4.38 4.07 3.75 3.04 1.79 1.12
175
3.51 3.19 3.00 2.79 2.53 2.04 1.16 1.15
175
3.92 3.52 3.32 3.09 2.81 2.28 1.37 1.15
175
4.14 3.72 3.54 3.31 3.07 2.59 1.71 1.15
175
3.71 3.34 3.18 2.99 2.74 2.26 1.42 1.20
175
4.00 3.61 3.46 3.25 3.00 2.48 1.57 1.21
175
3.70 3.32 3.18 2.97 2.70 2.25 1.40 1.22
175
4.15 3.80 3.64 3.42 3.22 2.71 1.76 1.24
175
3.61 3.22 3.03 2.81 2.53 2.05 1.20 1.27
175
4.02 3.62 3.43 3.25 2.95 2.42 1.50 1.28
175
3.99 3.62 3.45 3.23 2.96 2.51 1.57 1.34
175
159

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,016
53
20
1,002
59
21
1,036
58
21
3,071
148
11
3,142
41
12
4,522
52
15
6,788
17
19
4,534
76
12
4,920
20
19
4,555
61
13
3,416
110
12
3,284
33
13
3,362
86
16
3,654
27
13
5,287
27
22
3,955
64
16
3,521
126
11
4,610
78
15
4,671
65
13
4,470
81
15
5,389
58
11
4,093
66
19
4,348
61
14
4,686
68
13

Table A.1 (Cont'd)

File Title
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-I75-CS9035-07-02-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.98 3.59 3.46 3.22 2.97 2.50 1.55 1.41
175
3.97 3.56 3.40 3.20 2.95 2.48 1.59 1.41
175
4.06 3.67 3.46 3.22 2.92 2.39 1.36 1.44
175
3.61 3.22 3.04 2.82 2.54 2.07 1.19 1.46
175
4.25 3.84 3.69 3.48 3.26 2.75 1.78 1.50
175
3.71 3.34 3.21 2.99 2.79 2.29 1.39 1.51
175
3.76 3.35 3.15 2.95 2.68 2.17 1.27 1.56
175
3.69 3.29 3.08 2.88 2.61 2.10 1.20 1.60
175
3.68 3.34 3.15 2.99 2.75 2.28 1.37 1.61
175
3.89 3.46 3.28 3.07 2.76 2.28 1.34 1.62
175
4.23 3.84 3.64 3.45 3.25 2.72 1.75 1.62
175
4.08 3.64 3.43 3.22 2.95 2.41 1.42 1.73
175
3.72 3.32 3.13 2.89 2.65 2.16 1.21 1.85
175
4.52 4.14 3.96 3.77 3.51 2.99 2.1 0.83
175
4.52 4.19
4
3.83 3.55 3.04 2.03 1.01
175
4.65 4.29 4.08 3.89 3.58 2.99 1.91 1.02
175
4.54 4.16 3.96 3.75 3.53
3
2.06 1.06
175
4.03 3.69 3.51 3.33 3.02 2.5 1.5 1.17
175
3.86 3.53 3.34 3.17 2.89 2.41 1.49 1.21
175
4.15 3.8 3.64 3.47 3.2 2.7 1.73 1.22
175
4.13 3.77 3.57 3.38 3.14 2.63 1.7 1.22
175
3.78 3.43 3.28 3.07 2.8 2.34 1.42 1.27
175
4.6 4.24 3.99 3.81 3.51 2.97 1.89 1.32
175
3.56 3.19
3
2.79 2.53
2
1.11 1.38
175
160

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
4,892
58
14
4,374
88
12
4,705
23
19
4,458
51
19
5,068
65
11
5,833
33
17
4,270
54
18
4,436
45
20
6,108
25
18
4,201
56
17
5,012
62
11
4,476
40
16
4,871
31
20
3,815
131
8
5,446
58
10
4,985
35
11
3,982
115
9
5,826
15
18
5,348
45
15
5,833
39
12
4,653
74
12
5,362
41
16
4,787
45
11
5,002
24
24

Table A.1 (Cont'd)

File Title
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US127-CS29011-06-27-2008
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.62 4.3 4.03 3.86 3.59 3.02 1.9 1.38
175
4.02 3.65 3.46 3.3 3.01 2.49 1.53 1.39
175
4.12 3.74 3.56 3.36 3.1 2.6 1.62 1.40
175
3.8 3.45 3.26 3.13 2.83 2.36 1.48 1.42
175
3.92 3.54 3.39 3.22 2.95 2.47 1.55 1.43
175
3.9 3.56 3.36 3.22 2.97 2.45 1.53 1.44
175
4.14 3.8 3.64 3.46 3.21 2.74 1.72 1.45
175
3.87 3.52 3.33 3.17 2.91 2.44 1.52 1.46
175
3.4 3.05 2.85 2.67 2.44 1.98 1.18 1.47
175
4.01 3.62 3.44 3.27
3
2.47 1.5 1.53
175
3.83 3.46 3.29 3.09 2.82 2.37 1.43 1.55
175
3.91 3.57 3.37 3.2 2.97 2.48 1.52 1.58
175
4.19 3.84 3.63 3.5 3.24 2.75 1.73 1.68
175
3.53 3.2 2.94 2.73 2.52 1.98 1.09 1.74
175
4.12 3.76 3.53 3.38 3.14 2.63 1.63 1.74
175
3.84 3.46 3.28 3.07 2.82 2.37 1.41 1.78
175
3.44 3.09 2.89 2.7 2.5 2.03 1.16 1.90
175
3.41 3.02 2.83 2.65 2.45 1.98 1.16 1.98
175
6.10 5.21 4.72 4.07 3.64 2.78 1.72 0.71
700
5.12 4.24 3.82 3.40 3.06 2.46 1.56 1.36
700
5.55 4.55 4.16 3.58 3.23 2.49 1.50 1.46
700
5.27 4.33 3.98 3.45 3.13 2.50 1.55 1.59
700
5.67 4.68 4.30 3.72 3.37 2.71 1.67 1.67
700
5.75 4.76 4.33 3.81 3.45 2.75 1.69 1.68
700
161

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
5,680
18
12
5,332
35
15
5,044
47
13
5,104
59
14
5,433
51
14
5,727
38
15
6,820
14
14
5,447
49
14
4,639
70
19
5,365
31
15
5,206
43
15
6,134
24
16
6,493
19
14
4,863
26
24
5,671
32
14
5,200
41
16
5,671
28
22
4,841
60
19
909
50
22
996
89
23
964
60
25
974
77
23
942
71
22
958
66
21

Table A.1 (Cont'd)

File Title
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-30-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.52 3.67 3.38 2.94 2.64 2.08 1.26 1.71
700
4.93 4.02 3.66 3.19 2.89 2.26 1.37 1.77
700
5.76 4.73 4.27 3.67 3.25 2.50 1.40 1.89
700
4.51 3.66 3.35 2.95 2.62 2.09 1.23 2.15
700
5.76 4.71 4.25 3.69 3.25 2.50 1.37 2.15
700
4.50 3.61 3.29 2.91 2.59 2.00 1.15 2.34
700
5.64 4.56 4.14 3.60 3.22 2.49 1.40 2.39
700
4.30 3.48 3.19 2.75 2.46 1.88 1.03 2.42
700
4.29 3.43 3.15 2.73 2.43 1.89 1.06 2.53
700
4.31 3.48 3.11 2.74 2.45 1.93 1.10 2.68
700
4.79 3.88 3.58 3.10 2.75 2.15 1.16 2.72
700
5.60 4.53 4.15 3.58 3.18 2.52 1.38 2.83
700
4.47 3.59 3.26 2.89 2.60 2.05 1.16 2.96
700
3.40 2.97 2.77 2.48 2.27 1.83 1.15 1.13
700
5.62 4.63 4.26 3.73 3.33 2.56 1.52 1.44
700
3.34 2.93 2.74 2.43 2.21 1.81 1.10 1.50
700
6.93 5.90 5.44 4.82 4.32 3.35 1.91 1.52
700
7.22 6.11 5.64 4.99 4.47 3.48 2.01 1.54
700
6.35 5.46 4.99 4.40 3.95 3.08 1.74 1.60
700
4.90 3.97 3.59 3.16 2.77 2.10 1.21 1.64
700
8.23 6.89 6.24 5.47 4.83 3.71 2.08 1.64
700
4.95 4.07 3.74 3.31 3.00 2.35 1.44 1.73
700
6.88 5.86 5.42 4.79 4.29 3.35 1.87 1.75
700
4.84 3.92 3.63 3.20 2.84 2.21 1.32 1.77
700
162

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,186
80
29
1,070
74
27
977
44
27
1,224
75
30
1,011
40
27
1,290
65
33
1,017
48
26
1,429
53
37
1,328
65
35
1,332
70
34
1,364
44
33
1,020
47
26
1,355
65
32
2,500
76
32
1,064
49
24
2,656
66
34
1,147
25
20
1,010
28
19
1,217
26
22
1,130
55
31
735
27
18
1,168
68
25
1,184
23
21
1,199
63
28

Table A.1 (Cont'd)

File Title
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-08-23-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.96 3.17 2.92 2.55 2.23 1.75 1.03 1.83
700
3.98 3.20 2.95 2.55 2.28 1.73 1.00 1.92
700
5.14 4.14 3.82 3.31 2.92 2.21 1.23 2.01
700
6.67 5.42 4.98 4.34 3.82 2.85 1.53 2.02
700
5.70 4.69 4.29 3.77 3.38 2.60 1.48 2.03
700
8.05 6.73 6.11 5.34 4.74 3.67 1.98 2.19
700
4.86 3.91 3.55 3.10 2.73 2.08 1.15 2.23
700
3.96 3.25 2.98 2.61 2.36 1.88 1.10 2.32
700
3.35 2.88 2.61 2.28 2.06 1.61 0.86 2.33
700
5.92 4.85 4.44 3.96 3.55 2.75 1.57 2.34
700
8.01 6.70 6.07 5.28 4.70 3.64 1.93 2.39
700
4.25 3.50 3.10 2.70 2.43 1.88 1.06 2.42
700
4.81 3.98 3.59 3.14 2.86 2.19 1.23 2.42
700
4.09 3.31 2.99 2.68 2.41 1.95 1.18 2.43
700
4.14 3.38 3.05 2.70 2.46 2.02 1.23 2.51
700
3.92 3.20 2.94 2.59 2.34 1.90 1.09 2.94
700
7.78 6.51 5.99 5.28 4.62 3.58 2.14 0.90
700
7.44 6.15 5.66 4.92 4.27 3.19 1.81 0.97
700
5.72 4.81 4.52 3.98 3.46 2.64 1.53 1.02
700
7.79 6.46 5.98 5.26 4.61 3.57 2.13 1.09
700
7.43 6.13 5.67 4.92 4.24 3.25 1.86 1.15
700
5.38 4.42 4.09 3.56 3.13 2.37 1.39 1.16
700
6.21 5.08 4.76 4.22 3.72 2.94 1.86 1.24
700
5.42 4.43 4.10 3.62 3.13 2.37 1.39 1.26
700
163

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,316
82
35
1,389
69
37
1,115
44
30
976
26
25
1,128
41
25
853
23
19
1,170
50
32
1,543
75
33
2,420
39
46
1,082
41
23
883
21
20
1,299
62
34
1,296
49
30
1,274
103
31
1,243
106
29
1,749
68
34
813
36
18
835
30
22
1,289
34
26
806
37
18
822
33
21
1,128
50
28
939
63
20
1,124
49
28

Table A.1 (Cont'd)

File Title
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.70 6.41 5.88 5.19 4.54 3.54 2.08 1.26
700
7.66 6.34 5.89 5.23 4.59 3.57 2.14 1.30
700
5.77 4.85 4.53 4.02 3.48 2.67 1.47 1.40
700
7.66 6.34 5.92 5.23 4.59 3.61 2.15 1.44
700
5.32 4.28 3.99 3.49 3.05 2.33 1.39 1.50
700
6.18 5.10 4.78 4.24 3.73 2.94 1.77 1.52
700
7.72 6.40 5.99 5.30 4.60 3.62 2.11 1.54
700
5.08 4.18 3.91 3.40 2.97 2.31 1.33 1.55
700
5.77 4.83 4.54 4.00 3.46 2.66 1.44 1.59
700
6.54 5.49 5.14 4.59 4.02 3.08 1.69 1.62
700
7.42 6.04 5.61 4.93 4.20 3.19 1.77 1.63
700
5.44 4.39 4.00 3.55 3.11 2.37 1.39 1.71
700
6.25 5.07 4.81 4.22 3.77 2.97 1.83 1.78
700
5.32 4.25 3.95 3.51 3.03 2.35 1.40 1.81
700
5.14 4.12 3.82 3.29 2.88 2.15 1.19 1.84
700
4.98 4.03 3.72 3.30 2.86 2.19 1.23 1.97
700
4.91 3.87 3.57 3.16 2.77 2.18 1.32 1.99
700
5.17 4.21 3.96 3.47 3.07 2.37 1.35 2.01
700
5.14 4.09 3.77 3.29 2.84 2.14 1.18 2.02
700
5.35 4.28 4.02 3.50 3.07 2.36 1.35 2.07
700
5.19 4.19 3.95 3.45 3.02 2.35 1.34 2.09
700
5.17 4.14 3.82 3.29 2.84 2.15 1.15 2.10
700
4.82 3.87 3.57 3.20 2.77 2.19 1.29 2.11
700
5.34 4.21 3.92 3.39 2.93 2.17 1.18 2.12
700
164

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
829
35
19
865
36
18
1,389
26
28
867
37
18
1,067
58
28
1,058
49
22
888
32
18
1,284
48
29
1,381
25
29
1,326
20
25
833
30
22
1,071
54
28
1,003
56
21
1,081
60
27
1,161
44
33
1,276
47
32
1,045
81
28
1,346
44
29
1,143
46
33
1,137
50
28
1,270
48
29
1,198
40
34
1,192
68
29
1,116
40
33

Table A.1 (Cont'd)

File Title
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-15-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.26 4.21 3.88 3.38 2.93 2.19 1.17 2.13
700
5.12 4.10 3.77 3.26 2.79 2.10 1.10 2.13
700
5.24 4.17 3.93 3.50 3.13 2.48 1.54 2.20
700
5.32 4.22 3.82 3.38 2.88 2.12 1.12 2.23
700
5.17 4.09 3.82 3.31 2.90 2.16 1.19 2.24
700
5.17 4.12 3.84 3.47 3.06 2.44 1.50 2.27
700
5.24 4.20 3.93 3.55 3.15 2.48 1.50 2.37
700
5.27 4.15 3.84 3.32 2.88 2.15 1.15 2.37
700
5.12 4.06 3.73 3.28 2.82 2.12 1.10 2.62
700
5.38 4.18 3.87 3.41 3.00 2.27 1.29 2.67
700
8.93 7.59 7.09 6.34 5.55 4.28 2.59 0.85
700
9.01 7.63 7.16 6.41 5.62 4.32 2.59 1.02
700
8.99 7.62 7.15 6.39 5.60 4.29 2.53 1.03
700
6.66 5.58 5.20 4.72 4.23 3.41 2.25 1.09
700
5.99 5.06 4.76 4.38 3.96 3.31 2.29 1.12
700
6.37 5.34 5.06 4.55 4.06 3.26 2.12 1.18
700
6.63 5.61 5.21 4.82 4.29 3.55 2.39 1.19
700
8.03 6.92 6.55 5.97 5.43 4.47 2.93 1.22
700
6.61 5.52 5.21 4.69 4.19 3.40 2.22 1.23
700
8.76 7.56 7.09 6.54 5.82 4.66 2.92 1.24
700
7.54 6.29 5.86 5.33 4.68 3.77 2.41 1.29
700
6.35 5.28 4.98 4.49 3.99 3.22 2.09 1.29
700
6.75 5.70 5.34 4.95 4.39 3.65 2.47 1.29
700
8.87 7.64 7.17 6.58 5.87 4.72 2.92 1.33
700
165

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,197
37
34
1,201
38
36
1,117
76
24
1,122
37
35
1,185
43
33
1,115
77
25
1,230
63
25
1,140
40
34
1,309
33
36
1,050
53
30
830
27
15
858
24
15
880
22
16
970
68
17
1,111
100
16
1,090
62
18
1,014
77
16
1,086
47
13
1,007
66
17
1,069
27
13
870
52
16
1,024
67
18
1,014
77
15
1,061
26
14

Table A.1 (Cont'd)

File Title
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
8.86 7.60 7.15 6.57 5.86 4.70 2.94 1.34
700
7.53 6.25 5.85 5.32 4.68 3.79 2.45 1.35
700
7.57 6.34 5.88 5.37 4.72 3.82 2.43 1.36
700
5.92 4.98 4.67 4.33 3.92 3.25 2.23 1.39
700
5.92 4.90 4.60 4.20 3.77 3.11 2.09 1.40
700
5.46 4.46 4.13 3.71 3.36 2.65 1.74 1.41
700
6.50 5.40 5.02 4.57 4.07 3.29 2.12 1.43
700
5.98 5.02 4.75 4.40 3.99 3.35 2.31 1.51
700
5.67 4.63 4.29 3.86 3.41 2.71 1.70 1.53
700
6.71 5.67 5.33 4.89 4.37 3.62 2.35 1.54
700
7.14 6.00 5.59 5.10 4.45 3.50 2.07 1.61
700
7.21 6.05 5.65 5.11 4.46 3.56 2.07 1.81
700
7.23 6.04 5.65 5.10 4.45 3.51 2.01 1.85
700
6.99 5.84 5.46 4.99 4.38 3.45 2.01 1.94
700
6.86 5.75 5.34 4.91 4.31 3.39 1.97 1.98
700
10.03 8.38 7.84 7.20 6.47 5.17 3.17 2.05
700
6.90 5.72 5.33 4.86 4.30 3.35 1.92 2.18
700
11.90 10.23 9.55 8.67 7.66 6.02 3.65 1.03
700
11.78 10.10 9.44 8.54 7.57 5.96 3.62 1.06
700
11.85 10.08 9.44 8.58 7.60 5.96 3.63 1.26
700
11.88 10.20 9.55 8.63 7.66 5.92 3.35 1.33
700
6.50 5.25 4.87 4.24 3.67 2.75 1.59 1.34
700
6.81 5.68 5.30 4.68 4.05 3.06 1.68 1.35
700
9.42 7.96 7.47 6.76 5.94 4.65 2.78 1.35
700
166

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,034
28
13
852
56
15
866
52
16
1,145
96
16
1,031
93
18
1,024
90
22
990
66
18
1,184
98
16
1,052
71
22
1,112
63
16
1,141
30
19
1,142
29
19
1,142
27
20
1,234
28
20
1,270
27
21
855
26
12
1,229
27
21
736
18
11
729
19
11
725
20
11
836
10
13
903
41
25
1,126
24
25
886
23
15

Table A.1 (Cont'd)

File Title
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-11-16-2005-(2)
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
6.56 5.33 4.94 4.31 3.73 2.79 1.57 1.44
700
7.75 6.50 6.06 5.39 4.72 3.58 1.97 1.47
700
6.50 5.31 4.86 4.32 3.72 2.79 1.57 1.52
700
7.28 5.94 5.52 4.88 4.24 3.19 1.82 1.55
700
7.28 5.98 5.54 4.93 4.25 3.20 1.79 1.55
700
6.51 5.32 4.91 4.33 3.71 2.82 1.57 1.57
700
7.68 6.44 5.97 5.34 4.68 3.58 1.99 1.57
700
9.54 8.01 7.55 6.82 5.98 4.71 2.78 1.59
700
9.48 7.95 7.51 6.76 5.94 4.69 2.78 1.59
700
7.77 6.34 5.81 5.10 4.37 3.20 1.66 1.66
700
7.27 5.98 5.50 4.93 4.26 3.23 1.79 1.77
700
6.51 5.26 4.87 4.27 3.66 2.77 1.52 1.80
700
8.59 7.08 6.64 6.00 5.36 4.14 2.52 1.84
700
6.75 5.45 5.05 4.41 3.78 2.85 1.51 2.01
700
7.75 6.42 5.95 5.37 4.69 3.60 1.97 2.05
700
8.67 7.17 6.69 6.07 5.40 4.22 2.47 2.10
700
8.59 7.13 6.66 6.00 5.33 4.20 2.33 2.41
700
3.54 3.27 3.11 2.95 2.64 2.20 1.42 0.89
500
2.99 2.76 2.60 2.44 2.20 1.85 1.18 0.96
500
4.17 3.70 3.50 3.19 2.76 2.28 1.46 1.11
500
3.62 3.43 3.19 2.99 2.64 2.13 1.42 1.29
500
3.74 3.23 3.03 2.72 2.40 1.89 1.10 1.30
500
3.58 3.31 3.19 2.99 2.60 2.17 1.42 1.32
500
3.03 2.83 2.68 2.56 2.24 1.81 1.18 1.40
500
167

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
965
35
25
1,059
19
21
995
34
25
930
31
22
970
27
23
1,005
33
25
1,072
21
21
885
22
15
883
23
15
877
20
25
992
27
23
979
34
26
878
32
16
999
27
27
1,076
20
21
931
27
16
1,033
19
18
6,112
31
29
6,797
43
34
2,659
85
26
4,330
62
27
3,014
58
35
5,020
49
28
6,265
41
35

Table A.1 (Cont'd)

File Title
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-10-21-1998
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.03 2.72 2.60 2.48 2.20 1.81 1.14 1.44
500
4.45 3.78 3.50 3.19 2.72 2.13 1.26 1.45
500
4.37 3.74 3.46 3.19 2.76 2.13 1.26 1.51
500
4.17 3.66 3.46 3.15 2.68 2.24 1.42 1.57
500
3.58 3.23 3.11 2.99 2.64 2.24 1.46 1.60
500
3.86 3.31 3.11 2.87 2.44 1.93 1.14 1.67
500
3.03 2.72 2.56 2.48 2.17 1.77 1.14 1.71
500
3.86 3.27 3.11 2.83 2.44 1.93 1.14 1.72
500
4.37 3.78 3.50 3.23 2.76 2.20 1.26 1.74
500
4.25 3.74 3.50 3.23 2.72 2.28 1.42 1.83
500
3.54 3.19 3.07 2.95 2.56 2.20 1.42 1.88
500
2.95 2.87 2.80 2.44 2.24 1.81 1.22 2.25
500
3.78 3.23 3.03 2.83 2.40 1.97 1.14 2.38
500
5.31 4.45 4.02 3.50 3.03 2.28 1.34 0.64
500
5.28 4.41 4.02 3.46 3.03 2.24 1.34 0.66
500
4.02 3.66 3.43 3.19 2.91 2.44 1.65 0.75
500
3.50 3.23 3.07 2.87 2.64 2.24 1.50 0.81
500
3.58 3.27 3.07 2.83 2.60 2.17 1.42 0.87
500
3.54 3.23 3.07 2.87 2.64 2.24 1.50 0.95
500
3.46 3.15 2.99 2.76 2.52 2.17 1.46 1.03
500
4.13 3.82 3.58 3.31 3.03 2.60 1.73 1.06
500
4.02 3.66 3.43 3.19 2.91 2.48 1.65 1.08
500
3.03 2.72 2.56 2.36 2.17 1.81 1.18 1.16
500
5.83 5.04 4.65 4.13 3.66 2.99 1.85 1.22
500
168

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
6,542
37
36
2,097
64
30
2,387
55
31
2,437
92
26
6,055
38
27
2,807
62
34
5,683
61
35
2,834
62
34
2,600
47
31
2,467
82
26
5,714
45
28
6,054
59
33
3,053
54
32
1,223
62
27
1,179
64
27
3,346
97
21
5,500
64
24
4,229
79
25
5,037
75
23
4,242
109
23
3,801
76
20
3,539
88
21
4,705
101
30
1,352
69
19

Table A.1 (Cont'd)

File Title
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001
rigid-B-US23-CS25031-05-30-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.28 4.37 3.98 3.43 2.99 2.28 1.30 1.34
500
5.98 5.12 4.69 4.13 3.70 3.03 1.89 1.38
500
6.14 5.20 4.76 4.17 3.70 2.95 1.77 1.41
500
3.62 3.31 3.11 2.87 2.64 2.28 1.50 1.43
500
5.98 5.08 4.69 4.13 3.70 3.03 1.89 1.43
500
5.87 4.92 4.49 3.90 3.43 2.60 1.46 1.44
500
4.69 4.02 3.66 3.23 2.80 2.13 1.14 1.45
500
4.72 3.98 3.66 3.23 2.80 2.17 1.22 1.52
500
5.24 4.41 4.09 3.58 3.15 2.44 1.38 1.59
500
4.80 3.94 3.58 3.07 2.64 1.97 1.06 1.60
500
6.42 5.43 4.92 4.25 3.70 2.72 1.38 1.64
500
5.24 4.41 4.06 3.58 3.11 2.44 1.38 1.69
500
4.76 3.94 3.54 3.03 2.64 1.97 1.06 1.73
500
5.91 4.96 4.53 3.90 3.43 2.64 1.46 1.75
500
5.24 4.45 4.09 3.58 3.15 2.44 1.34 1.76
500
4.69 3.98 3.62 3.19 2.76 2.13 1.14 1.84
500
4.80 3.98 3.58 3.11 2.68 2.01 1.06 1.89
500
5.59 4.76 4.41 3.86 3.43 2.64 1.42 1.89
500
4.69 3.94 3.66 3.19 2.80 2.17 1.18 1.95
500
5.47 4.69 4.33 3.78 3.35 2.60 1.38 1.99
500
7.68 6.50 5.91 5.00 4.37 3.27 1.65 1.99
500
5.55 4.69 4.37 3.86 3.39 2.64 1.42 2.05
500
4.69 3.98 3.62 3.23 2.76 2.13 1.10 2.10
500
5.91 4.88 4.49 3.94 3.43 2.68 1.46 2.32
500
169

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,243
60
27
1,180
77
18
1,212
61
20
4,363
86
23
1,183
78
18
1,308
45
25
1,972
37
33
1,828
50
30
1,616
48
26
1,400
53
34
1,314
25
27
1,588
49
26
1,456
52
34
1,310
44
25
1,694
41
27
1,918
41
33
1,536
47
34
1,870
30
27
1,919
45
31
1,914
28
28
1,107
23
23
1,922
30
27
2,061
33
35
1,381
43
25

Table A.1 (Cont'd)

File Title
rigid-B-US23-CS25031-08-23-2005-(2)
rigid-B-US23-CS25031-08-23-2005-(2)
rigid-B-US23-CS25031-08-23-2005-(2)
rigid-B-US23-CS25031-08-23-2005-(2)
rigid-B-US23-CS25031-08-23-2005-(2)
rigid-B-US23-CS25031-08-23-2005-(2)
rigid-B-US23-CS25031-08-23-2005-(2)
rigid-B-US23-CS25031-08-23-2005-(2)
rigid-B-US23-CS25031-08-23-2005-(2)
rigid-B-US23-CS25031-08-23-2005-(2)
rigid-B-US23-CS25031-08-23-2005-(2)
rigid-G-I96-CS34044-06-27-2001
rigid-G-I96-CS34044-06-27-2001
rigid-G-I96-CS34044-06-27-2001
rigid-G-I96-CS34044-06-27-2001
rigid-G-I96-CS34044-06-27-2001
rigid-G-I96-CS34044-06-27-2001
rigid-G-I96-CS34044-06-27-2001
rigid-G-I96-CS34044-06-27-2001
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.06 5.93 5.44 4.76 4.23 3.24 2.25 1.43
500
7.11 5.96 5.48 4.80 4.28 3.27 2.35 1.97
500
4.74 3.98 3.64 3.22 2.90 2.29 1.35 1.98
500
12.60 10.56 9.86 8.80 7.88 6.08 3.46 2.04
500
4.76 3.99 3.64 3.21 2.91 2.29 1.35 2.08
500
4.15 3.28 2.97 2.55 2.26 1.75 1.02 2.13
500
12.79 10.67 9.94 8.85 7.96 6.16 3.54 2.14
500
6.90 5.78 5.29 4.67 4.22 3.27 1.87 2.18
500
3.38 2.65 2.39 2.05 1.82 1.42 0.83 2.26
500
6.93 5.81 5.32 4.71 4.24 3.31 1.87 2.32
500
4.72 3.91 3.60 3.18 2.88 2.25 1.30 2.38
500
7.48 6.22 5.55 4.69 3.98 2.83 1.57 0.67
700
7.52 6.26 5.55 4.72 3.98 2.87 1.61 0.86
700
7.52 6.26 5.47 4.69 3.94 2.83 1.61 1.25
700
3.78 3.27 2.95 2.64 2.28 1.81 0.98 2.51
700
3.78 3.27 2.95 2.60 2.28 1.81 0.98 2.57
700
3.82 3.27 2.95 2.60 2.24 1.81 0.98 2.79
700
3.50 3.15 2.91 2.64 2.40 2.05 1.38 2.83
700
5.43 4.69 4.25 3.78 3.43 2.72 1.73 2.94
700
4.45 3.82 3.46 3.03 2.68 2.05 1.18 1.21
700
3.74 3.39 3.19 2.87 2.64 2.20 1.46 1.32
700
3.46 3.03 2.76 2.40 2.17 1.69 1.02 1.36
700
3.50 3.03 2.80 2.44 2.20 1.73 1.02 1.43
700
3.31 2.99 2.83 2.56 2.32 1.97 1.30 1.45
700
170

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
741
79
15
675
88
14
1,644
70
26
1,562
36
21
1,585
72
25
1,213
103
33
1,455
40
20
1,195
39
18
1,402
137
41
1,211
38
18
1,687
62
26
829
27
27
852
27
27
857
27
27
2,381
43
43
2,360
43
43
2,319
43
43
5,014
35
35
2,282
27
27
1,512
37
37
3,369
32
32
2,255
44
44
2,239
44
44
3,902
35
35

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.35 2.83 2.56 2.20 1.97 1.50 0.87 1.60
700
4.53 4.02 3.66 3.15 2.83 2.20 1.26 1.63
700
3.82 3.39 3.11 2.76 2.52 2.05 1.26 1.70
700
4.37 3.86 3.50 3.03 2.72 2.17 1.30 1.77
700
4.49 3.86 3.50 2.99 2.68 2.09 1.22 1.79
700
3.58 2.95 2.72 2.36 2.09 1.61 0.94 1.84
700
3.82 3.39 3.11 2.76 2.52 2.05 1.22 1.87
700
3.35 2.91 2.68 2.32 2.13 1.69 1.02 1.91
700
3.03 2.60 2.40 2.09 1.89 1.50 0.87 1.91
700
2.87 2.52 2.32 2.05 1.85 1.50 0.87 1.98
700
4.25 3.70 3.39 2.99 2.72 2.20 1.34 1.98
700
4.53 4.02 3.66 3.19 2.87 2.24 1.26 2.02
700
4.53 3.86 3.50 3.03 2.68 2.13 1.22 2.04
700
4.72 4.13 3.78 3.27 2.91 2.36 1.42 2.04
700
5.51 4.88 4.53 4.02 3.70 3.07 1.97 2.09
700
3.35 2.87 2.60 2.20 1.97 1.54 0.91 2.10
700
5.12 4.49 4.13 3.62 3.31 2.68 1.69 2.11
700
3.23 2.91 2.72 2.44 2.28 1.93 1.30 2.15
700
3.43 2.99 2.76 2.36 2.13 1.73 1.02 2.21
700
3.39 2.87 2.60 2.24 1.97 1.54 0.94 2.23
700
3.43 2.87 2.64 2.24 2.01 1.57 0.94 2.30
700
3.43 2.91 2.64 2.28 2.05 1.61 0.98 2.33
700
3.70 3.23 2.99 2.60 2.36 1.93 1.22 2.37
700
3.62 3.11 2.83 2.44 2.20 1.77 1.02 2.38
700
171

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,959
51
51
1,564
35
35
2,550
36
36
1,812
35
35
1,566
37
37
1,911
47
47
2,419
37
37
2,500
44
44
2,557
51
51
2,939
51
51
2,097
33
33
1,584
35
35
1,546
36
36
1,661
31
31
2,005
23
23
2,069
49
49
1,873
27
27
4,258
36
36
2,315
43
43
2,141
49
49
2,118
48
48
2,229
46
46
2,616
38
38
2,075
43
43

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-15-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.72 4.13 3.82 3.35 3.07 2.52 1.61 2.40
700
3.35 2.83 2.60 2.24 2.01 1.57 0.98 2.40
700
5.59 4.96 4.61 4.06 3.70 3.11 2.01 2.42
700
3.35 2.87 2.60 2.24 2.01 1.57 0.98 2.43
700
5.55 4.88 4.53 4.02 3.70 3.07 2.01 2.43
700
3.74 3.23 3.03 2.64 2.40 1.93 1.26 2.43
700
4.72 4.21 3.86 3.43 3.11 2.60 1.69 2.44
700
3.54 2.95 2.68 2.28 2.05 1.61 0.94 2.55
700
4.09 3.46 3.19 2.83 2.60 2.09 1.30 2.58
700
5.94 5.28 4.96 4.41 4.09 3.46 2.36 2.62
700
4.33 3.82 3.54 3.15 2.95 2.48 1.65 2.81
700
3.82 3.31 3.03 2.68 2.44 1.97 1.30 2.88
700
2.52 2.40 2.28 2.13 2.01 1.73 1.22 0.65
700
2.20 2.05 1.93 1.81 1.69 1.42 0.98 0.68
700
2.95 2.80 2.68 2.48 2.36 2.01 1.42 0.68
700
2.48 2.36 2.24 2.09 1.97 1.69 1.18 0.70
700
2.48 2.28 2.17 2.01 1.85 1.57 1.06 0.71
700
2.68 2.52 2.44 2.24 2.09 1.81 1.26 0.74
700
3.03 2.83 2.72 2.52 2.40 2.05 1.46 0.76
700
2.60 2.52 2.40 2.24 2.13 1.85 1.34 0.77
700
2.72 2.56 2.44 2.28 2.17 1.85 1.30 0.79
700
3.03 2.87 2.76 2.56 2.44 2.13 1.54 0.79
700
3.58 3.46 3.31 3.15 2.99 2.68 1.97 0.84
700
3.03 2.87 2.72 2.52 2.40 2.05 1.46 0.88
700
172

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
2,184
28
28
2,360
47
47
1,980
23
23
2,342
47
47
2,044
23
23
2,616
37
37
2,346
27
27
1,967
47
47
2,292
35
35
2,319
20
20
2,905
28
28
2,646
36
36
7,358
37
37
7,377
47
47
6,293
32
32
7,219
38
38
5,931
43
43
6,639
36
36
6,300
31
31
7,984
33
33
6,779
35
35
6,972
29
29
7,100
22
22
6,050
31
31

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.11 2.95 2.80 2.68 2.52 2.24 1.65 0.89
700
2.99 2.83 2.72 2.48 2.36 2.01 1.42 0.89
700
2.52 2.36 2.24 2.09 1.97 1.69 1.22 0.91
700
2.17 2.01 1.89 1.77 1.61 1.34 0.87 0.93
700
2.44 2.32 2.20 2.01 1.89 1.61 1.10 0.94
700
3.19 3.07 2.95 2.72 2.60 2.28 1.65 0.95
700
2.32 2.20 2.09 1.93 1.85 1.57 1.10 0.96
700
2.32 2.17 2.05 1.89 1.77 1.50 1.06 0.97
700
2.99 2.87 2.76 2.56 2.48 2.17 1.61 0.97
700
2.44 2.28 2.17 2.01 1.85 1.61 1.10 0.97
700
2.52 2.36 2.24 2.05 1.89 1.61 1.06 0.98
700
2.44 2.28 2.17 1.97 1.85 1.57 1.06 0.98
700
3.39 3.31 3.15 2.95 2.83 2.52 1.89 1.00
700
2.80 2.64 2.48 2.28 2.17 1.81 1.26 1.01
700
3.23 3.07 2.95 2.76 2.64 2.32 1.65 1.02
700
2.40 2.32 2.17 2.01 1.89 1.61 1.14 1.02
700
2.56 2.44 2.28 2.13 2.01 1.73 1.22 1.03
700
2.83 2.72 2.60 2.40 2.32 2.01 1.46 1.03
700
3.03 2.87 2.76 2.56 2.40 2.13 1.50 1.04
700
3.07 2.95 2.83 2.64 2.52 2.24 1.61 1.04
700
3.07 2.95 2.80 2.60 2.48 2.17 1.54 1.06
700
2.91 2.83 2.68 2.52 2.40 2.13 1.54 1.07
700
2.76 2.64 2.52 2.32 2.24 1.93 1.38 1.08
700
2.99 2.83 2.72 2.52 2.44 2.13 1.57 1.08
700
173

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
7,787
27
27
5,869
32
32
7,518
37
37
5,893
52
52
6,625
42
42
6,700
27
27
7,605
40
40
7,228
43
43
7,789
27
27
6,748
42
42
5,633
43
43
6,148
43
43
7,582
23
23
5,734
36
36
6,764
27
27
7,229
40
40
7,067
37
37
7,514
30
30
6,547
30
30
7,307
27
27
6,624
29
29
7,783
29
29
7,265
32
32
7,614
28
28

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.99 2.83 2.68 2.48 2.36 2.05 1.46 1.09
700
2.91 2.80 2.64 2.48 2.32 2.01 1.38 1.09
700
3.11 2.95 2.80 2.60 2.48 2.17 1.57 1.10
700
3.07 2.91 2.80 2.56 2.44 2.13 1.54 1.10
700
2.76 2.56 2.44 2.28 2.13 1.85 1.26 1.12
700
2.40 2.24 2.13 1.97 1.85 1.61 1.14 1.13
700
2.83 2.72 2.60 2.40 2.28 2.01 1.42 1.13
700
2.64 2.44 2.32 2.17 2.05 1.77 1.26 1.14
700
3.07 2.91 2.83 2.60 2.48 2.20 1.57 1.14
700
2.99 2.80 2.68 2.48 2.36 2.05 1.42 1.14
700
2.13 2.01 1.89 1.73 1.61 1.34 0.87 1.14
700
2.91 2.76 2.60 2.40 2.28 1.97 1.38 1.15
700
3.27 3.11 2.95 2.76 2.64 2.32 1.65 1.15
700
2.44 2.32 2.17 1.97 1.85 1.54 1.02 1.15
700
2.87 2.72 2.60 2.40 2.28 2.01 1.46 1.15
700
2.87 2.72 2.60 2.40 2.28 2.01 1.46 1.15
700
3.39 3.31 3.15 2.95 2.80 2.48 1.77 1.16
700
2.87 2.72 2.60 2.40 2.28 2.01 1.42 1.16
700
2.44 2.28 2.17 1.97 1.89 1.57 1.10 1.16
700
3.23 3.07 2.91 2.72 2.60 2.28 1.61 1.18
700
2.56 2.40 2.24 2.05 1.93 1.61 1.06 1.18
700
2.91 2.80 2.72 2.48 2.32 2.05 1.46 1.18
700
2.83 2.68 2.56 2.36 2.24 1.97 1.38 1.18
700
3.07 2.95 2.80 2.60 2.48 2.20 1.61 1.19
700
174

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
6,561
31
31
5,997
32
32
6,791
29
29
6,652
29
29
6,125
35
35
7,637
39
39
7,010
31
31
7,324
36
36
6,980
28
28
6,251
32
32
6,106
51
51
6,257
33
33
6,484
27
27
5,517
44
44
7,441
31
31
7,419
31
31
6,442
25
25
6,956
31
31
6,598
41
41
6,376
28
28
5,360
43
43
6,810
31
31
6,862
33
33
7,276
27
27

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.44 2.36 2.24 2.05 1.97 1.69 1.22 1.19
700
3.23 3.07 2.91 2.72 2.56 2.28 1.65 1.20
700
2.95 2.80 2.68 2.44 2.36 2.01 1.42 1.20
700
3.07 2.91 2.80 2.60 2.52 2.20 1.57 1.21
700
2.36 2.24 2.13 1.93 1.85 1.57 1.10 1.21
700
2.32 2.13 2.05 1.89 1.77 1.54 1.06 1.21
700
2.20 2.09 1.97 1.81 1.69 1.46 0.98 1.21
700
3.15 3.03 2.87 2.68 2.56 2.28 1.69 1.21
700
2.52 2.32 2.20 2.01 1.89 1.61 1.10 1.21
700
2.44 2.28 2.13 1.97 1.85 1.57 1.10 1.21
700
2.87 2.72 2.60 2.40 2.32 2.01 1.42 1.22
700
2.36 2.20 2.09 1.93 1.81 1.57 1.06 1.22
700
3.19 2.99 2.91 2.68 2.56 2.28 1.65 1.23
700
2.48 2.36 2.24 2.05 1.97 1.69 1.22 1.23
700
2.44 2.40 2.28 2.13 2.01 1.73 1.22 1.23
700
3.07 2.91 2.76 2.60 2.48 2.20 1.57 1.23
700
3.07 2.95 2.80 2.60 2.48 2.20 1.57 1.24
700
3.11 2.99 2.83 2.64 2.52 2.24 1.61 1.24
700
3.50 3.39 3.27 3.03 2.95 2.60 1.89 1.24
700
2.91 2.76 2.60 2.40 2.28 1.97 1.42 1.25
700
2.52 2.40 2.28 2.09 2.01 1.73 1.26 1.25
700
3.19 2.99 2.87 2.68 2.56 2.28 1.65 1.26
700
3.11 2.95 2.80 2.56 2.44 2.09 1.42 1.26
700
2.52 2.40 2.32 2.13 2.01 1.77 1.22 1.26
700
175

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
7,972
37
37
6,698
27
27
6,350
32
32
7,069
28
28
7,208
41
41
7,500
43
43
7,139
46
46
7,614
26
26
6,218
41
41
6,863
42
42
6,996
32
32
6,908
42
42
7,058
27
27
7,782
37
37
7,592
36
36
7,309
29
29
6,874
28
28
7,033
27
27
6,819
23
23
6,563
32
32
7,868
35
35
7,144
27
27
5,300
32
32
7,270
36
36

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.03 2.87 2.80 2.56 2.44 2.17 1.54 1.27
700
2.52 2.36 2.28 2.09 1.93 1.69 1.22 1.27
700
3.66 3.50 3.39 3.15 3.03 2.76 2.09 1.28
700
2.95 2.83 2.72 2.52 2.36 2.13 1.57 1.28
700
2.48 2.32 2.20 2.05 1.93 1.65 1.10 1.28
700
2.87 2.72 2.56 2.40 2.28 2.01 1.46 1.28
700
2.13 1.97 1.85 1.69 1.57 1.34 0.91 1.29
700
2.48 2.32 2.20 2.01 1.89 1.61 1.06 1.29
700
3.31 3.11 2.95 2.76 2.64 2.32 1.65 1.29
700
3.11 2.95 2.83 2.60 2.52 2.20 1.57 1.29
700
2.95 2.83 2.68 2.44 2.32 2.01 1.42 1.29
700
2.95 2.80 2.64 2.48 2.36 2.09 1.54 1.31
700
2.99 2.80 2.68 2.48 2.40 2.09 1.50 1.32
700
2.09 1.93 1.85 1.69 1.57 1.34 0.87 1.32
700
2.40 2.28 2.13 1.97 1.81 1.57 1.10 1.32
700
3.46 3.31 3.15 2.91 2.83 2.48 1.81 1.32
700
3.03 2.83 2.68 2.48 2.36 2.05 1.42 1.33
700
3.62 3.50 3.35 3.11 3.03 2.72 2.05 1.33
700
3.27 3.11 2.95 2.76 2.64 2.36 1.73 1.33
700
3.03 2.91 2.80 2.60 2.52 2.24 1.61 1.33
700
2.48 2.28 2.17 1.97 1.89 1.57 1.06 1.33
700
2.83 2.72 2.60 2.36 2.28 1.97 1.42 1.34
700
3.11 2.99 2.87 2.64 2.56 2.28 1.69 1.34
700
3.43 3.31 3.15 2.91 2.80 2.48 1.77 1.35
700
176

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
6,965
29
29
7,416
37
37
7,908
21
21
7,890
28
28
6,488
41
41
7,578
31
31
6,974
50
50
5,953
43
43
6,391
27
27
6,646
28
28
6,170
32
32
7,702
29
29
7,199
30
30
6,676
51
51
6,836
41
41
6,594
25
25
5,948
31
31
7,741
21
21
7,349
26
26
7,659
27
27
6,090
43
43
7,117
32
32
7,854
26
26
6,308
25
25

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.48 2.28 2.20 2.01 1.89 1.57 1.02 1.35
700
2.83 2.68 2.52 2.32 2.24 1.89 1.30 1.36
700
2.68 2.56 2.44 2.24 2.13 1.89 1.34 1.36
700
2.87 2.76 2.60 2.40 2.28 2.01 1.42 1.36
700
2.52 2.32 2.20 2.01 1.89 1.61 1.06 1.37
700
2.72 2.52 2.40 2.20 2.09 1.81 1.26 1.37
700
2.68 2.52 2.40 2.24 2.13 1.85 1.26 1.37
700
2.80 2.64 2.56 2.36 2.24 2.01 1.42 1.38
700
2.44 2.32 2.20 2.05 1.93 1.65 1.10 1.38
700
3.19 2.91 2.76 2.44 2.28 1.89 1.22 1.38
700
2.83 2.64 2.56 2.32 2.20 1.93 1.34 1.38
700
2.87 2.68 2.56 2.36 2.24 1.97 1.42 1.38
700
2.83 2.72 2.56 2.36 2.24 1.97 1.42 1.39
700
2.64 2.52 2.40 2.20 2.13 1.85 1.30 1.39
700
2.95 2.80 2.72 2.48 2.40 2.13 1.54 1.40
700
3.07 2.87 2.76 2.56 2.48 2.17 1.54 1.40
700
2.91 2.76 2.64 2.44 2.36 2.09 1.50 1.40
700
2.87 2.72 2.60 2.40 2.24 2.01 1.42 1.40
700
3.23 3.07 2.91 2.72 2.60 2.32 1.65 1.41
700
3.23 3.07 2.91 2.72 2.60 2.32 1.65 1.41
700
2.95 2.80 2.64 2.44 2.36 2.05 1.46 1.43
700
2.76 2.60 2.48 2.28 2.20 1.93 1.38 1.43
700
2.44 2.32 2.20 2.05 1.93 1.69 1.14 1.44
700
2.32 2.20 2.13 1.93 1.85 1.57 1.06 1.44
700
177

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
5,539
44
44
5,859
34
34
7,576
33
33
6,888
32
32
5,849
43
43
6,600
36
36
6,738
35
35
7,659
31
31
6,536
40
40
3,810
38
38
6,453
33
33
7,164
32
32
7,226
32
32
7,418
34
34
7,477
28
28
6,895
29
29
7,733
30
30
7,031
32
32
6,747
27
27
6,709
27
27
6,975
31
31
7,419
32
32
7,119
39
39
7,090
43
43

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.83 2.72 2.64 2.40 2.32 2.05 1.46 1.44
700
2.20 2.05 1.93 1.77 1.69 1.42 0.94 1.45
700
2.44 2.36 2.24 2.05 1.97 1.73 1.22 1.45
700
2.40 2.20 2.09 1.93 1.81 1.57 1.06 1.46
700
3.27 3.15 2.99 2.76 2.64 2.36 1.69 1.46
700
3.39 3.27 3.15 2.91 2.83 2.56 1.89 1.46
700
2.72 2.52 2.40 2.20 2.13 1.81 1.26 1.46
700
2.83 2.72 2.56 2.36 2.24 1.93 1.30 1.46
700
2.95 2.83 2.64 2.48 2.40 2.09 1.50 1.46
700
2.72 2.56 2.44 2.24 2.17 1.89 1.34 1.46
700
2.52 2.36 2.20 2.01 1.89 1.61 1.06 1.47
700
3.54 3.43 3.27 3.03 2.95 2.64 1.93 1.47
700
3.27 3.07 2.91 2.76 2.68 2.36 1.77 1.47
700
3.11 2.99 2.83 2.64 2.56 2.28 1.65 1.47
700
2.87 2.72 2.56 2.36 2.24 1.97 1.38 1.47
700
2.95 2.80 2.68 2.48 2.36 2.13 1.54 1.47
700
3.23 3.11 2.95 2.72 2.64 2.32 1.65 1.48
700
2.64 2.52 2.36 2.20 2.09 1.85 1.34 1.48
700
2.95 2.83 2.68 2.48 2.40 2.13 1.54 1.49
700
2.83 2.76 2.60 2.40 2.32 2.05 1.50 1.49
700
3.62 3.50 3.35 3.11 2.99 2.72 2.09 1.50
700
2.48 2.32 2.17 1.97 1.85 1.57 1.02 1.50
700
2.80 2.60 2.48 2.28 2.20 1.89 1.30 1.50
700
2.48 2.32 2.17 2.01 1.89 1.65 1.14 1.51
700
178

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
7,477
30
30
6,841
49
49
7,983
36
36
6,767
42
42
6,589
26
26
7,842
23
23
6,615
36
36
5,747
34
34
7,395
30
30
7,410
33
33
5,680
43
43
7,088
23
23
8,000
25
25
7,519
26
26
6,708
33
33
7,780
29
29
6,584
27
27
8,000
33
33
7,571
28
28
7,980
29
29
7,962
21
21
5,438
44
44
6,455
35
35
7,011
40
40

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.68 2.52 2.36 2.17 2.05 1.77 1.26 1.52
700
2.28 2.13 2.05 1.85 1.77 1.54 1.06 1.52
700
1.93 1.81 1.69 1.54 1.42 1.14 0.71 1.53
700
2.87 2.72 2.56 2.40 2.32 2.05 1.50 1.54
700
2.91 2.68 2.60 2.36 2.28 1.97 1.38 1.54
700
2.87 2.80 2.64 2.44 2.36 2.09 1.50 1.54
700
3.07 2.91 2.76 2.56 2.48 2.20 1.61 1.55
700
2.95 2.83 2.72 2.48 2.44 2.13 1.54 1.55
700
2.40 2.28 2.20 2.01 1.89 1.61 1.06 1.55
700
2.48 2.32 2.20 2.01 1.89 1.65 1.10 1.56
700
3.27 3.11 2.95 2.72 2.60 2.32 1.65 1.56
700
2.48 2.36 2.20 2.01 1.93 1.65 1.14 1.56
700
3.03 2.87 2.72 2.56 2.48 2.20 1.57 1.56
700
2.80 2.64 2.48 2.28 2.20 1.89 1.30 1.56
700
2.24 2.09 2.01 1.81 1.73 1.50 1.02 1.56
700
2.24 2.09 2.01 1.81 1.73 1.50 1.02 1.56
700
2.83 2.64 2.52 2.28 2.17 1.89 1.30 1.57
700
2.91 2.76 2.60 2.40 2.28 2.01 1.38 1.57
700
2.99 2.80 2.64 2.48 2.36 2.09 1.54 1.58
700
2.99 2.80 2.68 2.44 2.36 2.05 1.42 1.58
700
2.87 2.76 2.60 2.40 2.32 2.05 1.46 1.59
700
2.60 2.48 2.40 2.17 2.09 1.85 1.30 1.59
700
2.24 2.13 2.01 1.81 1.69 1.46 1.02 1.60
700
2.24 2.13 2.01 1.81 1.69 1.46 1.02 1.60
700
179

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
6,778
37
37
7,644
42
42
5,496
62
62
8,000
29
29
6,483
33
33
7,546
29
29
7,603
27
27
7,507
28
28
6,373
43
43
6,471
41
41
6,432
27
27
6,809
40
40
7,745
29
29
6,231
34
34
7,569
44
44
7,383
43
43
6,198
35
35
6,305
32
32
7,792
30
30
6,333
32
32
7,347
30
30
7,781
34
34
7,174
44
44
7,207
45
45

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.40 2.24 2.09 1.93 1.81 1.57 1.10 1.60
700
2.72 2.52 2.40 2.24 2.17 1.89 1.34 1.60
700
2.60 2.48 2.32 2.17 2.05 1.73 1.14 1.60
700
2.60 2.48 2.32 2.17 2.05 1.73 1.14 1.60
700
2.28 2.09 2.05 1.85 1.77 1.54 1.06 1.61
700
2.36 2.20 2.09 1.89 1.81 1.54 1.02 1.61
700
3.07 2.91 2.76 2.52 2.44 2.13 1.54 1.61
700
4.17 3.62 3.27 2.83 2.56 1.97 1.14 1.61
700
2.64 2.44 2.32 2.13 2.05 1.77 1.26 1.61
700
2.99 2.83 2.68 2.44 2.28 2.01 1.42 1.62
700
2.83 2.72 2.56 2.36 2.28 2.01 1.42 1.62
700
2.95 2.76 2.64 2.40 2.32 2.01 1.46 1.62
700
2.72 2.56 2.44 2.24 2.13 1.89 1.30 1.62
700
2.95 2.76 2.64 2.44 2.36 2.09 1.54 1.62
700
2.99 2.83 2.72 2.48 2.40 2.13 1.57 1.62
700
2.52 2.36 2.24 2.01 1.93 1.65 1.14 1.62
700
2.72 2.52 2.40 2.17 2.09 1.77 1.26 1.63
700
3.31 3.07 2.95 2.72 2.64 2.32 1.69 1.63
700
3.19 2.91 2.72 2.44 2.28 1.89 1.18 1.63
700
2.32 2.24 2.09 1.89 1.77 1.50 0.98 1.64
700
2.64 2.56 2.44 2.24 2.13 1.89 1.30 1.64
700
2.52 2.48 2.32 2.13 2.01 1.69 1.14 1.65
700
2.99 2.83 2.68 2.44 2.36 2.05 1.42 1.65
700
2.40 2.28 2.13 1.93 1.77 1.54 1.02 1.65
700
180

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
7,071
41
41
7,686
33
33
5,727
39
39
5,739
39
39
7,871
42
42
6,440
44
44
6,799
29
29
1,704
39
39
7,363
36
36
6,099
32
32
7,321
32
32
6,967
31
31
6,928
34
34
8,000
29
29
7,821
28
28
6,529
40
40
6,552
37
37
6,823
26
26
3,630
38
38
5,815
45
45
7,164
34
34
6,115
40
40
6,141
32
32
5,866
44
44

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.56 2.44 2.28 2.09 1.97 1.73 1.18 1.65
700
2.87 2.72 2.60 2.36 2.28 2.01 1.42 1.66
700
3.46 3.39 3.23 2.99 2.95 2.60 1.89 1.66
700
2.91 2.72 2.56 2.36 2.24 1.97 1.38 1.66
700
2.52 2.36 2.24 2.05 1.97 1.73 1.22 1.66
700
2.52 2.36 2.24 2.05 1.97 1.73 1.22 1.67
700
2.48 2.36 2.20 2.01 1.93 1.65 1.18 1.67
700
2.99 2.83 2.68 2.48 2.40 2.13 1.57 1.67
700
3.35 3.27 3.11 2.91 2.80 2.56 1.85 1.67
700
3.07 2.95 2.80 2.56 2.48 2.20 1.57 1.67
700
3.94 3.39 3.11 2.68 2.40 1.89 1.10 1.68
700
2.44 2.28 2.17 1.97 1.89 1.65 1.14 1.68
700
3.11 2.99 2.83 2.60 2.56 2.24 1.65 1.68
700
2.87 2.72 2.60 2.36 2.28 2.01 1.46 1.68
700
2.95 2.83 2.68 2.48 2.36 2.13 1.50 1.68
700
2.68 2.56 2.48 2.24 2.17 1.89 1.30 1.69
700
2.40 2.36 2.20 2.01 1.93 1.65 1.14 1.70
700
2.44 2.28 2.17 1.97 1.89 1.57 1.02 1.70
700
2.87 2.72 2.60 2.36 2.32 2.01 1.46 1.70
700
1.93 1.77 1.65 1.54 1.42 1.14 0.71 1.70
700
2.95 2.80 2.72 2.48 2.40 2.17 1.57 1.70
700
2.83 2.72 2.56 2.36 2.24 2.01 1.42 1.70
700
2.72 2.60 2.44 2.24 2.13 1.89 1.34 1.70
700
3.03 2.87 2.72 2.52 2.48 2.17 1.57 1.71
700
181

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
6,579
38
38
7,044
32
32
7,041
23
23
6,504
33
33
7,654
36
36
7,710
37
37
7,338
39
39
7,920
28
28
7,601
23
23
6,926
28
28
1,831
40
40
7,357
39
39
7,685
27
27
7,384
30
30
7,388
30
30
6,899
34
34
7,066
39
39
5,688
44
44
7,360
30
30
5,661
62
62
8,000
28
28
7,273
31
31
7,268
33
33
7,426
28
28

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.48 2.32 2.17 1.97 1.89 1.57 1.02 1.71
700
2.76 2.68 2.52 2.36 2.24 1.97 1.34 1.71
700
2.40 2.20 2.13 1.93 1.85 1.61 1.10 1.71
700
2.56 2.40 2.24 2.01 1.93 1.61 1.06 1.71
700
2.52 2.36 2.20 2.01 1.93 1.65 1.14 1.72
700
2.64 2.48 2.36 2.13 2.05 1.69 1.10 1.72
700
2.36 2.20 2.05 1.89 1.77 1.54 1.02 1.72
700
2.52 2.36 2.28 2.05 2.01 1.73 1.22 1.72
700
2.76 2.56 2.44 2.28 2.20 1.93 1.34 1.72
700
2.68 2.52 2.40 2.20 2.13 1.85 1.26 1.73
700
3.11 2.91 2.80 2.60 2.52 2.24 1.57 1.73
700
2.91 2.80 2.64 2.44 2.36 2.09 1.46 1.73
700
2.99 2.80 2.68 2.48 2.36 2.13 1.57 1.74
700
3.54 3.46 3.31 3.03 2.95 2.64 1.89 1.75
700
3.11 2.95 2.80 2.56 2.48 2.20 1.57 1.77
700
2.64 2.60 2.40 2.20 2.09 1.81 1.26 1.78
700
2.56 2.40 2.24 2.05 1.93 1.65 1.06 1.79
700
2.52 2.36 2.17 1.97 1.89 1.57 1.06 1.79
700
2.95 2.80 2.64 2.44 2.36 2.09 1.46 1.79
700
2.36 2.20 2.09 1.93 1.77 1.54 0.98 1.80
700
3.11 2.91 2.76 2.52 2.44 2.13 1.54 1.81
700
2.80 2.64 2.52 2.32 2.24 2.01 1.42 1.81
700
2.80 2.64 2.48 2.28 2.20 1.93 1.34 1.81
700
2.83 2.68 2.56 2.32 2.20 1.97 1.38 1.81
700
182

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
5,486
44
44
6,732
33
33
7,344
41
41
5,438
43
43
6,732
40
40
5,259
41
41
6,536
44
44
7,559
36
36
7,345
33
33
6,831
36
36
7,053
28
28
7,028
30
30
7,947
28
28
6,575
23
23
6,926
29
29
6,592
36
36
5,507
43
43
5,683
43
43
7,105
31
31
5,926
46
46
6,676
29
29
7,797
31
31
6,863
34
34
6,893
33
33

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.23 2.87 2.68 2.40 2.24 1.85 1.18 1.82
700
2.28 2.17 2.01 1.81 1.65 1.42 0.91 1.82
700
2.52 2.36 2.24 2.01 1.93 1.65 1.18 1.83
700
2.83 2.72 2.56 2.32 2.24 1.93 1.30 1.83
700
2.87 2.68 2.56 2.32 2.24 1.97 1.38 1.83
700
3.19 3.11 2.95 2.68 2.64 2.32 1.69 1.84
700
3.98 3.43 3.11 2.68 2.40 1.89 1.10 1.84
700
2.91 2.80 2.64 2.44 2.40 2.13 1.54 1.85
700
2.68 2.52 2.36 2.17 2.09 1.81 1.22 1.85
700
3.50 3.39 3.23 2.99 2.91 2.64 1.89 1.85
700
2.76 2.60 2.48 2.28 2.20 1.97 1.38 1.85
700
2.91 2.80 2.64 2.40 2.36 2.05 1.46 1.86
700
3.11 2.76 2.56 2.28 2.09 1.73 1.06 1.86
700
2.64 2.44 2.36 2.13 2.09 1.81 1.30 1.89
700
3.15 3.03 2.87 2.64 2.56 2.32 1.69 1.90
700
2.87 2.72 2.56 2.36 2.24 2.01 1.46 1.90
700
4.21 3.62 3.31 2.83 2.56 2.01 1.18 1.91
700
3.11 2.95 2.76 2.52 2.40 2.09 1.38 1.92
700
2.68 2.60 2.48 2.32 2.20 1.97 1.34 1.93
700
2.64 2.48 2.32 2.09 2.01 1.73 1.18 1.93
700
3.03 2.83 2.72 2.44 2.32 2.05 1.46 1.93
700
3.03 2.87 2.72 2.48 2.44 2.13 1.50 1.93
700
2.91 2.76 2.64 2.40 2.32 2.09 1.50 1.95
700
2.99 2.83 2.68 2.48 2.40 2.17 1.57 1.95
700
183

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
3,556
38
38
5,385
49
49
7,003
39
39
5,781
34
34
6,883
33
33
7,107
26
26
1,785
40
40
8,000
28
28
6,356
37
37
7,019
23
23
7,743
32
32
6,988
30
30
3,216
42
42
7,781
34
34
7,690
26
26
7,598
31
31
1,770
38
38
5,036
32
32
7,304
32
32
6,050
38
38
6,373
31
31
6,645
29
29
7,766
30
30
8,000
28
28

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.91 2.64 2.44 2.17 2.05 1.69 1.10 1.96
700
2.91 2.64 2.44 2.17 2.05 1.69 1.10 1.96
700
3.62 3.31 2.99 2.56 2.36 1.85 1.14 1.96
700
2.83 2.60 2.44 2.28 2.20 1.89 1.38 1.98
700
3.15 2.87 2.72 2.44 2.28 1.97 1.34 1.98
700
2.72 2.64 2.52 2.28 2.24 1.97 1.38 1.98
700
3.62 3.15 2.91 2.52 2.28 1.81 1.14 1.98
700
4.37 3.78 3.39 2.95 2.68 2.09 1.22 1.98
700
3.27 3.15 2.95 2.76 2.68 2.44 1.77 2.00
700
3.46 3.27 3.07 2.87 2.72 2.48 1.77 2.00
700
2.48 2.28 2.17 1.97 1.93 1.65 1.14 2.01
700
2.76 2.60 2.48 2.24 2.20 1.93 1.38 2.01
700
3.23 3.03 2.83 2.64 2.52 2.20 1.65 2.01
700
2.64 2.48 2.40 2.17 2.13 1.85 1.26 2.02
700
3.19 3.07 2.87 2.64 2.56 2.28 1.69 2.02
700
3.11 2.91 2.80 2.60 2.56 2.28 1.61 2.04
700
2.80 2.60 2.44 2.24 2.17 1.89 1.30 2.04
700
2.87 2.72 2.56 2.32 2.24 1.97 1.42 2.04
700
4.61 3.98 3.66 3.15 2.87 2.28 1.38 2.05
700
2.36 2.20 2.05 1.89 1.77 1.57 1.10 2.06
700
2.87 2.64 2.52 2.32 2.24 1.97 1.46 2.07
700
3.03 2.83 2.64 2.36 2.20 1.89 1.30 2.07
700
3.54 3.15 2.83 2.48 2.24 1.81 1.10 2.07
700
2.68 2.60 2.48 2.32 2.24 1.97 1.34 2.07
700
184

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
4,130
42
42
4,095
41
41
2,283
39
39
7,277
33
33
4,766
34
34
7,578
32
32
2,431
40
40
1,678
36
36
7,876
25
25
6,613
25
25
7,179
39
39
7,547
32
32
6,860
27
27
7,076
35
35
7,328
26
26
7,566
27
27
6,466
34
34
7,114
32
32
1,788
33
33
7,866
42
42
7,993
31
31
4,891
35
35
2,382
40
40
7,354
32
32

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.09 1.97 1.81 1.65 1.54 1.34 0.87 2.08
700
2.40 2.24 2.13 1.89 1.85 1.57 1.10 2.09
700
2.87 2.68 2.48 2.28 2.20 1.89 1.26 2.11
700
3.07 2.91 2.76 2.48 2.44 2.13 1.50 2.12
700
2.32 2.24 2.09 1.85 1.77 1.50 0.98 2.12
700
2.60 2.44 2.32 2.05 1.97 1.69 1.10 2.12
700
2.28 2.17 2.05 1.85 1.73 1.46 0.91 2.12
700
3.03 2.80 2.60 2.36 2.24 1.89 1.34 2.13
700
3.07 2.95 2.76 2.52 2.40 2.13 1.42 2.13
700
3.46 3.27 3.11 2.83 2.72 2.44 1.81 2.13
700
2.68 2.60 2.48 2.28 2.20 1.97 1.34 2.14
700
3.07 2.83 2.60 2.36 2.17 1.85 1.26 2.14
700
3.23 3.03 2.83 2.60 2.52 2.20 1.61 2.16
700
2.99 2.99 2.76 2.48 2.32 1.97 1.34 2.16
700
2.91 2.80 2.64 2.40 2.36 2.09 1.46 2.18
700
2.91 2.80 2.64 2.36 2.28 1.97 1.30 2.18
700
2.32 2.17 2.05 1.85 1.73 1.50 0.94 2.18
700
2.52 2.36 2.20 2.01 1.93 1.65 1.06 2.20
700
3.74 3.23 2.95 2.56 2.32 1.85 1.14 2.20
700
3.27 3.11 2.95 2.68 2.64 2.36 1.73 2.21
700
3.43 2.99 2.80 2.44 2.28 1.81 1.18 2.22
700
3.54 3.27 2.95 2.52 2.32 1.85 1.14 2.23
700
2.17 2.05 1.93 1.73 1.65 1.46 0.98 2.23
700
3.43 3.23 3.03 2.80 2.76 2.44 1.73 2.23
700
185

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
6,686
51
51
7,106
41
41
5,692
36
36
6,355
29
29
5,858
45
45
5,531
41
41
5,356
48
48
5,275
34
34
5,584
31
31
6,821
25
25
7,428
32
32
4,516
37
37
6,564
28
28
4,792
33
33
7,068
30
30
5,380
34
34
5,649
46
46
5,823
42
42
2,244
40
40
7,509
26
26
2,982
39
39
2,390
39
39
7,752
46
46
6,462
26
26

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.28 2.13 2.05 1.81 1.77 1.54 1.06 2.24
700
4.61 3.98 3.66 3.19 2.91 2.32 1.46 2.25
700
3.15 3.19 2.95 2.68 2.56 2.20 1.61 2.26
700
2.87 2.80 2.60 2.36 2.28 1.93 1.26 2.26
700
2.24 2.09 1.97 1.77 1.73 1.50 1.02 2.27
700
3.31 3.07 2.91 2.64 2.52 2.24 1.61 2.27
700
3.58 3.23 2.95 2.48 2.28 1.81 1.10 2.27
700
3.15 3.19 2.95 2.68 2.60 2.20 1.61 2.27
700
3.11 2.87 2.68 2.40 2.20 1.85 1.30 2.28
700
3.11 2.80 2.60 2.36 2.20 1.89 1.26 2.29
700
2.91 2.72 2.52 2.32 2.24 1.97 1.38 2.29
700
2.48 2.28 2.13 1.97 1.85 1.61 1.02 2.30
700
3.70 3.23 2.95 2.60 2.40 1.93 1.22 2.30
700
5.04 4.41 4.02 3.50 3.19 2.56 1.61 2.31
700
3.07 2.99 2.83 2.56 2.52 2.28 1.65 2.31
700
3.43 3.07 2.80 2.44 2.20 1.81 1.14 2.31
700
2.20 2.05 1.89 1.73 1.65 1.42 0.91 2.32
700
3.43 3.27 2.95 2.64 2.44 2.05 1.38 2.33
700
2.76 2.60 2.48 2.24 2.20 1.97 1.38 2.35
700
3.74 3.66 3.35 2.91 2.68 2.17 1.38 2.36
700
2.32 2.20 2.09 1.85 1.77 1.57 1.10 2.37
700
2.76 2.60 2.48 2.20 2.13 1.89 1.30 2.37
700
5.04 4.69 4.45 4.09 3.86 3.46 2.60 2.38
700
2.91 2.72 2.60 2.36 2.32 2.09 1.50 2.39
700
186

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
7,845
43
43
1,980
32
32
6,068
28
28
5,136
35
35
7,763
44
44
6,069
28
28
2,232
40
40
6,067
28
28
4,503
36
36
4,546
36
36
6,737
33
33
5,727
43
43
2,602
37
37
1,813
29
29
7,911
27
27
2,712
39
39
6,428
49
49
3,702
34
34
7,844
33
33
2,714
33
33
7,740
41
41
6,547
34
34
4,591
18
18
8,000
29
29

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.09 3.50 3.19 2.76 2.48 1.93 1.06 2.39
700
2.20 2.09 1.97 1.77 1.73 1.46 0.94 2.40
700
3.66 3.23 2.95 2.64 2.44 2.01 1.30 2.43
700
2.68 2.56 2.44 2.17 2.13 1.89 1.30 2.44
700
3.03 2.87 2.72 2.44 2.44 2.13 1.54 2.44
700
2.99 2.99 2.76 2.44 2.32 1.93 1.34 2.44
700
2.36 2.20 2.05 1.85 1.77 1.54 1.10 2.45
700
2.95 2.80 2.64 2.40 2.36 2.13 1.54 2.47
700
3.07 2.80 2.60 2.36 2.17 1.89 1.30 2.47
700
3.03 2.80 2.64 2.36 2.24 1.97 1.38 2.48
700
5.08 4.37 4.02 3.50 3.23 2.60 1.61 2.48
700
2.72 2.60 2.48 2.20 2.20 1.93 1.38 2.50
700
3.70 3.15 2.87 2.52 2.28 1.85 1.10 2.55
700
4.96 4.61 4.37 3.98 3.82 3.39 2.56 2.56
700
3.07 2.80 2.60 2.24 2.13 1.77 1.14 2.57
700
3.70 3.66 3.35 2.91 2.68 2.17 1.38 2.58
700
4.57 3.98 3.62 3.15 2.87 2.32 1.46 2.60
700
3.74 3.27 3.03 2.60 2.40 1.97 1.22 2.61
700
3.15 3.15 2.95 2.60 2.52 2.20 1.57 2.62
700
2.87 2.87 2.68 2.36 2.17 1.77 1.14 2.63
700
3.35 3.31 2.99 2.64 2.52 2.09 1.42 2.63
700
5.16 4.49 4.09 3.54 3.23 2.64 1.61 2.63
700
4.02 3.74 3.46 3.19 2.95 2.64 1.89 2.66
700
3.03 3.03 2.76 2.44 2.32 1.97 1.34 2.67
700
187

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,605
40
40
6,536
47
47
3,066
36
36
7,059
34
34
7,160
29
29
4,759
34
34
7,664
42
42
7,878
28
28
4,932
36
36
5,698
33
33
1,827
28
28
7,802
32
32
2,294
41
41
4,701
18
18
3,749
40
40
2,759
33
33
2,030
32
32
2,508
37
37
5,835
28
28
3,871
39
39
3,985
32
32
1,716
28
28
4,702
25
25
4,678
34
34

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.94 4.06 3.74 3.39 3.19 2.80 1.97 2.67
700
1.93 1.81 1.65 1.50 1.42 1.18 0.71 2.67
700
3.82 3.43 3.15 2.80 2.60 2.17 1.46 2.67
700
4.72 4.88 4.57 4.13 3.94 3.50 2.64 2.68
700
2.95 2.72 2.60 2.32 2.24 2.01 1.42 2.69
700
3.03 3.11 2.91 2.60 2.44 2.09 1.50 2.69
700
4.69 4.06 3.66 3.15 2.87 2.32 1.38 2.70
700
3.03 2.99 2.80 2.44 2.28 1.89 1.18 2.71
700
4.37 3.90 3.58 3.15 2.95 2.44 1.61 2.72
700
4.61 3.98 3.62 3.11 2.87 2.28 1.42 2.72
700
4.06 3.74 3.46 3.15 2.99 2.64 1.85 2.72
700
3.11 2.80 2.60 2.24 2.17 1.77 1.14 2.74
700
3.07 2.99 2.80 2.40 2.28 1.89 1.18 2.75
700
2.83 2.83 2.64 2.32 2.13 1.73 1.10 2.75
700
2.99 2.99 2.87 2.60 2.36 2.01 1.30 2.77
700
2.95 2.99 2.68 2.40 2.28 1.89 1.30 2.78
700
3.19 2.91 2.72 2.48 2.36 2.05 1.50 2.78
700
3.50 3.07 2.83 2.48 2.28 1.81 1.22 2.80
700
3.54 3.11 2.87 2.48 2.32 1.89 1.22 2.80
700
3.39 2.95 2.76 2.36 2.20 1.81 1.14 2.81
700
2.99 3.11 2.87 2.60 2.44 2.09 1.50 2.81
700
3.86 3.43 3.19 2.80 2.60 2.17 1.46 2.83
700
3.70 3.70 3.35 2.91 2.72 2.20 1.42 2.83
700
3.86 4.02 3.74 3.39 3.19 2.76 1.93 2.84
700
188

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
4,586
23
23
5,779
62
62
3,212
32
32
4,887
17
17
6,767
32
32
5,666
30
30
1,721
32
32
3,678
38
38
2,673
29
29
1,875
32
32
4,459
25
25
3,696
40
40
3,610
38
38
3,772
41
41
4,499
35
35
4,731
35
35
6,005
31
31
2,945
38
38
2,904
37
37
2,968
40
40
5,853
30
30
3,144
32
32
2,884
32
32
4,509
23
23

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-29-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.11 2.80 2.56 2.28 2.17 1.81 1.22 2.86
700
2.95 3.07 2.83 2.56 2.40 2.09 1.46 2.89
700
3.39 2.99 2.76 2.40 2.20 1.85 1.18 2.89
700
2.80 2.83 2.64 2.32 2.13 1.77 1.14 2.89
700
3.03 3.03 2.91 2.64 2.44 2.01 1.30 2.93
700
2.95 2.80 2.64 2.36 2.28 1.97 1.22 2.94
700
4.57 3.98 3.62 3.11 2.87 2.32 1.46 2.95
700
2.56 2.44 2.28 2.20 2.13 1.81 1.18 2.97
700
3.98 3.82 3.46 2.99 2.68 2.05 1.18 2.97
700
3.03 2.99 2.80 2.40 2.28 1.89 1.18 2.97
700
3.31 3.31 3.03 2.60 2.40 1.93 1.26 2.99
700
2.52 2.40 2.28 2.13 2.01 1.73 1.22 0.65
700
2.20 2.05 1.93 1.81 1.69 1.42 0.98 0.68
700
2.95 2.80 2.68 2.48 2.36 2.01 1.42 0.68
700
2.48 2.36 2.24 2.09 1.97 1.69 1.18 0.70
700
2.48 2.28 2.17 2.01 1.85 1.57 1.06 0.71
700
2.68 2.52 2.44 2.24 2.09 1.81 1.26 0.74
700
3.03 2.83 2.72 2.52 2.40 2.05 1.46 0.76
700
2.60 2.52 2.40 2.24 2.13 1.85 1.34 0.77
700
2.72 2.56 2.44 2.28 2.17 1.85 1.30 0.79
700
3.03 2.87 2.76 2.56 2.44 2.13 1.54 0.79
700
3.58 3.46 3.31 3.15 2.99 2.68 1.97 0.84
700
3.03 2.87 2.72 2.52 2.40 2.05 1.46 0.88
700
3.11 2.95 2.80 2.68 2.52 2.24 1.65 0.89
700
189

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
4,249
38
38
5,793
31
31
3,185
40
40
4,109
39
39
4,312
35
35
4,622
36
36
2,032
32
32
6,787
37
37
1,755
36
36
3,719
38
38
3,116
36
36
7,358
37
37
7,377
47
47
6,293
32
32
7,220
38
38
5,931
43
43
6,639
36
36
6,300
31
31
7,984
33
33
6,779
35
35
6,972
29
29
7,100
22
22
6,050
31
31
7,787
27
27

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.99 2.83 2.72 2.48 2.36 2.01 1.42 0.89
700
2.52 2.36 2.24 2.09 1.97 1.69 1.22 0.91
700
2.17 2.01 1.89 1.77 1.61 1.34 0.87 0.93
700
2.44 2.32 2.20 2.01 1.89 1.61 1.10 0.94
700
3.19 3.07 2.95 2.72 2.60 2.28 1.65 0.95
700
2.32 2.20 2.09 1.93 1.85 1.57 1.10 0.96
700
2.32 2.17 2.05 1.89 1.77 1.50 1.06 0.97
700
2.99 2.87 2.76 2.56 2.48 2.17 1.61 0.97
700
2.44 2.28 2.17 2.01 1.85 1.61 1.10 0.97
700
2.52 2.36 2.24 2.05 1.89 1.61 1.06 0.98
700
2.44 2.28 2.17 1.97 1.85 1.57 1.06 0.98
700
3.39 3.31 3.15 2.95 2.83 2.52 1.89 1.00
700
2.80 2.64 2.48 2.28 2.17 1.81 1.26 1.01
700
3.23 3.07 2.95 2.76 2.64 2.32 1.65 1.02
700
2.40 2.32 2.17 2.01 1.89 1.61 1.14 1.02
700
2.56 2.44 2.28 2.13 2.01 1.73 1.22 1.03
700
2.83 2.72 2.60 2.40 2.32 2.01 1.46 1.03
700
3.03 2.87 2.76 2.56 2.40 2.13 1.50 1.04
700
3.07 2.95 2.83 2.64 2.52 2.24 1.61 1.04
700
3.07 2.95 2.80 2.60 2.48 2.17 1.54 1.06
700
2.91 2.83 2.68 2.52 2.40 2.13 1.54 1.07
700
2.76 2.64 2.52 2.32 2.24 1.93 1.38 1.08
700
2.99 2.83 2.72 2.52 2.44 2.13 1.57 1.08
700
2.99 2.83 2.68 2.48 2.36 2.05 1.46 1.09
700
190

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
5,869
32
32
7,518
37
37
5,893
52
52
6,625
42
42
6,700
27
27
7,605
40
40
7,228
43
43
7,789
27
27
6,748
42
42
5,633
43
43
6,148
43
43
7,582
23
23
5,734
36
36
6,764
27
27
7,229
40
40
7,067
37
37
7,514
30
30
6,547
30
30
7,307
27
27
6,624
29
29
7,783
29
29
7,265
32
32
7,614
28
28
6,561
31
31

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.91 2.80 2.64 2.48 2.32 2.01 1.38 1.09
700
3.11 2.95 2.80 2.60 2.48 2.17 1.57 1.10
700
3.07 2.91 2.80 2.56 2.44 2.13 1.54 1.10
700
2.76 2.56 2.44 2.28 2.13 1.85 1.26 1.12
700
2.40 2.24 2.13 1.97 1.85 1.61 1.14 1.13
700
2.83 2.72 2.60 2.40 2.28 2.01 1.42 1.13
700
2.64 2.44 2.32 2.17 2.05 1.77 1.26 1.14
700
3.07 2.91 2.83 2.60 2.48 2.20 1.57 1.14
700
2.99 2.80 2.68 2.48 2.36 2.05 1.42 1.14
700
2.13 2.01 1.89 1.73 1.61 1.34 0.87 1.14
700
2.91 2.76 2.60 2.40 2.28 1.97 1.38 1.15
700
3.27 3.11 2.95 2.76 2.64 2.32 1.65 1.15
700
2.44 2.32 2.17 1.97 1.85 1.54 1.02 1.15
700
2.87 2.72 2.60 2.40 2.28 2.01 1.46 1.15
700
2.87 2.72 2.60 2.40 2.28 2.01 1.46 1.15
700
3.39 3.31 3.15 2.95 2.80 2.48 1.77 1.16
700
2.87 2.72 2.60 2.40 2.28 2.01 1.42 1.16
700
2.44 2.28 2.17 1.97 1.89 1.57 1.10 1.16
700
3.23 3.07 2.91 2.72 2.60 2.28 1.61 1.18
700
2.56 2.40 2.24 2.05 1.93 1.61 1.06 1.18
700
2.91 2.80 2.72 2.48 2.32 2.05 1.46 1.18
700
2.83 2.68 2.56 2.36 2.24 1.97 1.38 1.18
700
3.07 2.95 2.80 2.60 2.48 2.20 1.61 1.19
700
2.44 2.36 2.24 2.05 1.97 1.69 1.22 1.19
700
191

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
5,997
32
32
6,791
29
29
6,652
29
29
6,125
35
35
7,637
39
39
7,010
31
31
7,324
36
36
6,980
28
28
6,251
32
32
6,106
51
51
6,257
33
33
6,484
27
27
5,517
44
44
7,441
31
31
7,419
31
31
6,442
25
25
6,956
31
31
6,598
41
41
6,376
28
28
5,360
43
43
6,810
31
31
6,862
33
33
7,276
27
27
7,972
37
37

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.23 3.07 2.91 2.72 2.56 2.28 1.65 1.20
700
2.95 2.80 2.68 2.44 2.36 2.01 1.42 1.20
700
3.07 2.91 2.80 2.60 2.52 2.20 1.57 1.21
700
2.36 2.24 2.13 1.93 1.85 1.57 1.10 1.21
700
2.32 2.13 2.05 1.89 1.77 1.54 1.06 1.21
700
3.15 3.03 2.87 2.68 2.56 2.28 1.69 1.21
700
2.20 2.09 1.97 1.81 1.69 1.46 0.98 1.21
700
2.52 2.32 2.20 2.01 1.89 1.61 1.10 1.21
700
2.44 2.28 2.13 1.97 1.85 1.57 1.10 1.21
700
2.87 2.72 2.60 2.40 2.32 2.01 1.42 1.22
700
2.36 2.20 2.09 1.93 1.81 1.57 1.06 1.22
700
3.19 2.99 2.91 2.68 2.56 2.28 1.65 1.23
700
2.48 2.36 2.24 2.05 1.97 1.69 1.22 1.23
700
2.44 2.40 2.28 2.13 2.01 1.73 1.22 1.23
700
3.07 2.91 2.76 2.60 2.48 2.20 1.57 1.23
700
3.07 2.95 2.80 2.60 2.48 2.20 1.57 1.24
700
3.11 2.99 2.83 2.64 2.52 2.24 1.61 1.24
700
3.50 3.39 3.27 3.03 2.95 2.60 1.89 1.24
700
2.91 2.76 2.60 2.40 2.28 1.97 1.42 1.25
700
2.52 2.40 2.28 2.09 2.01 1.73 1.26 1.25
700
3.19 2.99 2.87 2.68 2.56 2.28 1.65 1.26
700
3.11 2.95 2.80 2.56 2.44 2.09 1.42 1.26
700
2.52 2.40 2.32 2.13 2.01 1.77 1.22 1.26
700
3.03 2.87 2.80 2.56 2.44 2.17 1.54 1.27
700
192

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
6,698
27
27
6,350
32
32
7,069
28
28
7,208
41
41
7,500
43
43
7,614
26
26
7,139
46
46
6,218
41
41
6,863
42
42
6,996
32
32
6,908
42
42
7,058
27
27
7,782
37
37
7,592
36
36
7,310
29
29
6,874
28
28
7,033
27
27
6,819
23
23
6,563
32
32
7,868
35
35
7,144
27
27
5,300
32
32
7,270
36
36
6,965
29
29

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.52 2.36 2.28 2.09 1.93 1.69 1.22 1.27
700
3.66 3.50 3.39 3.15 3.03 2.76 2.09 1.28
700
2.95 2.83 2.72 2.52 2.36 2.13 1.57 1.28
700
2.48 2.32 2.20 2.05 1.93 1.65 1.10 1.28
700
2.87 2.72 2.56 2.40 2.28 2.01 1.46 1.28
700
2.13 1.97 1.85 1.69 1.57 1.34 0.91 1.29
700
2.48 2.32 2.20 2.01 1.89 1.61 1.06 1.29
700
3.31 3.11 2.95 2.76 2.64 2.32 1.65 1.29
700
3.11 2.95 2.83 2.60 2.52 2.20 1.57 1.29
700
2.95 2.83 2.68 2.44 2.32 2.01 1.42 1.29
700
2.95 2.80 2.64 2.48 2.36 2.09 1.54 1.31
700
2.40 2.28 2.17 1.97 1.89 1.61 1.10 1.31
700
2.99 2.80 2.68 2.48 2.40 2.09 1.50 1.32
700
2.09 1.93 1.85 1.69 1.57 1.34 0.87 1.32
700
2.40 2.28 2.13 1.97 1.81 1.57 1.10 1.32
700
3.46 3.31 3.15 2.91 2.83 2.48 1.81 1.32
700
3.03 2.83 2.68 2.48 2.36 2.05 1.42 1.33
700
3.62 3.50 3.35 3.11 3.03 2.72 2.05 1.33
700
3.27 3.11 2.95 2.76 2.64 2.36 1.73 1.33
700
3.03 2.91 2.80 2.60 2.52 2.24 1.61 1.33
700
2.48 2.28 2.17 1.97 1.89 1.57 1.06 1.33
700
2.44 2.32 2.17 2.01 1.89 1.65 1.14 1.33
700
2.83 2.72 2.60 2.36 2.28 1.97 1.42 1.34
700
3.11 2.99 2.87 2.64 2.56 2.28 1.69 1.34
700
193

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
7,416
37
37
7,908
21
21
7,890
28
28
6,488
41
41
7,578
31
31
6,974
50
50
5,953
43
43
6,391
27
27
6,646
28
28
6,170
32
32
7,702
29
29
6,797
40
40
7,199
30
30
6,676
51
51
6,836
41
41
6,594
25
25
5,948
31
31
7,741
21
21
7,349
26
26
7,659
27
27
6,090
43
43
7,168
39
39
7,117
32
32
7,854
26
26

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.43 3.31 3.15 2.91 2.80 2.48 1.77 1.35
700
2.48 2.28 2.20 2.01 1.89 1.57 1.02 1.35
700
2.83 2.68 2.52 2.32 2.24 1.89 1.30 1.36
700
2.68 2.56 2.44 2.24 2.13 1.89 1.34 1.36
700
2.87 2.76 2.60 2.40 2.28 2.01 1.42 1.36
700
2.52 2.32 2.20 2.01 1.89 1.61 1.06 1.37
700
2.72 2.52 2.40 2.20 2.09 1.81 1.26 1.37
700
2.68 2.52 2.40 2.24 2.13 1.85 1.26 1.37
700
2.80 2.64 2.56 2.36 2.24 2.01 1.42 1.38
700
2.44 2.32 2.20 2.05 1.93 1.65 1.10 1.38
700
3.19 2.91 2.76 2.44 2.28 1.89 1.22 1.38
700
2.83 2.64 2.56 2.32 2.20 1.93 1.34 1.38
700
2.87 2.68 2.56 2.36 2.24 1.97 1.42 1.38
700
2.83 2.72 2.56 2.36 2.24 1.97 1.42 1.39
700
3.15 3.03 2.87 2.68 2.56 2.28 1.61 1.39
700
2.64 2.52 2.40 2.20 2.13 1.85 1.30 1.39
700
2.95 2.80 2.72 2.48 2.40 2.13 1.54 1.40
700
3.07 2.87 2.76 2.56 2.48 2.17 1.54 1.40
700
2.91 2.76 2.64 2.44 2.36 2.09 1.50 1.40
700
2.87 2.72 2.60 2.40 2.24 2.01 1.42 1.40
700
3.23 3.07 2.91 2.72 2.60 2.32 1.65 1.41
700
3.23 3.07 2.91 2.72 2.60 2.32 1.65 1.41
700
3.15 2.99 2.87 2.68 2.60 2.28 1.61 1.43
700
2.95 2.80 2.64 2.44 2.36 2.05 1.46 1.43
700
194

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
6,308
25
25
5,539
44
44
5,859
34
34
7,576
33
33
6,888
32
32
5,849
43
43
6,600
36
36
6,738
35
35
7,659
31
31
6,536
40
40
3,810
38
38
6,453
33
33
7,164
32
32
7,226
32
32
6,718
27
27
7,418
34
34
7,477
28
28
6,895
29
29
7,733
30
30
7,031
32
32
6,747
27
27
6,709
27
27
6,768
27
27
6,975
31
31

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.76 2.60 2.48 2.28 2.20 1.93 1.38 1.43
700
2.44 2.32 2.20 2.05 1.93 1.69 1.14 1.44
700
2.32 2.20 2.13 1.93 1.85 1.57 1.06 1.44
700
2.83 2.72 2.64 2.40 2.32 2.05 1.46 1.44
700
2.20 2.05 1.93 1.77 1.69 1.42 0.94 1.45
700
2.44 2.36 2.24 2.05 1.97 1.73 1.22 1.45
700
3.27 3.15 2.99 2.76 2.64 2.36 1.69 1.46
700
2.40 2.20 2.09 1.93 1.81 1.57 1.06 1.46
700
3.39 3.27 3.15 2.91 2.83 2.56 1.89 1.46
700
2.72 2.52 2.40 2.20 2.13 1.81 1.26 1.46
700
2.83 2.72 2.56 2.36 2.24 1.93 1.30 1.46
700
2.95 2.83 2.64 2.48 2.40 2.09 1.50 1.46
700
2.72 2.56 2.44 2.24 2.17 1.89 1.34 1.46
700
2.52 2.36 2.20 2.01 1.89 1.61 1.06 1.47
700
3.54 3.43 3.27 3.03 2.95 2.64 1.93 1.47
700
3.27 3.07 2.91 2.76 2.68 2.36 1.77 1.47
700
3.11 2.99 2.83 2.64 2.56 2.28 1.65 1.47
700
2.87 2.72 2.56 2.36 2.24 1.97 1.38 1.47
700
3.03 2.99 2.83 2.60 2.52 2.20 1.61 1.47
700
2.95 2.80 2.68 2.48 2.36 2.13 1.54 1.47
700
3.23 3.11 2.95 2.72 2.64 2.32 1.65 1.48
700
2.64 2.52 2.36 2.20 2.09 1.85 1.34 1.48
700
2.95 2.83 2.68 2.48 2.40 2.13 1.54 1.49
700
3.15 3.03 2.87 2.68 2.60 2.28 1.61 1.49
700
195

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
7,419
32
32
7,119
39
39
7,090
43
43
7,477
30
30
6,841
49
49
7,983
36
36
6,589
26
26
6,767
42
42
7,843
23
23
6,615
36
36
5,747
34
34
7,395
30
30
7,410
33
33
5,680
43
43
7,088
23
23
8,000
25
25
7,519
26
26
6,708
33
33
7,258
27
27
7,780
29
29
6,584
27
27
8,000
33
33
7,571
28
28
6,718
27
27

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.83 2.76 2.60 2.40 2.32 2.05 1.50 1.49
700
3.62 3.50 3.35 3.11 2.99 2.72 2.09 1.50
700
2.48 2.32 2.17 1.97 1.85 1.57 1.02 1.50
700
2.80 2.60 2.48 2.28 2.20 1.89 1.30 1.50
700
2.48 2.32 2.17 2.01 1.89 1.65 1.14 1.51
700
2.68 2.52 2.36 2.17 2.05 1.77 1.26 1.52
700
2.28 2.13 2.05 1.85 1.77 1.54 1.06 1.52
700
1.93 1.81 1.69 1.54 1.42 1.14 0.71 1.53
700
2.87 2.72 2.56 2.40 2.32 2.05 1.50 1.54
700
2.91 2.68 2.60 2.36 2.28 1.97 1.38 1.54
700
2.87 2.80 2.64 2.44 2.36 2.09 1.50 1.54
700
3.07 2.91 2.76 2.56 2.48 2.20 1.61 1.55
700
2.95 2.83 2.72 2.48 2.44 2.13 1.54 1.55
700
2.40 2.28 2.20 2.01 1.89 1.61 1.06 1.55
700
2.48 2.32 2.20 2.01 1.89 1.65 1.10 1.56
700
3.27 3.11 2.95 2.72 2.60 2.32 1.65 1.56
700
2.48 2.36 2.20 2.01 1.93 1.65 1.14 1.56
700
3.03 2.87 2.72 2.56 2.48 2.20 1.57 1.56
700
2.80 2.64 2.48 2.28 2.20 1.89 1.30 1.56
700
2.24 2.09 2.01 1.81 1.73 1.50 1.02 1.56
700
2.24 2.09 2.01 1.81 1.73 1.50 1.02 1.56
700
2.83 2.64 2.52 2.28 2.17 1.89 1.30 1.57
700
2.91 2.76 2.60 2.40 2.28 2.01 1.38 1.57
700
2.99 2.80 2.64 2.48 2.36 2.09 1.54 1.58
700
196

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
7,980
29
29
7,962
21
21
5,438
44
44
6,455
35
35
7,011
40
40
6,778
37
37
7,644
42
42
5,496
62
62
8,000
29
29
6,483
33
33
7,546
29
29
7,603
27
27
7,507
28
28
6,373
43
43
6,471
41
41
6,432
27
27
6,809
40
40
7,745
29
29
6,231
34
34
7,569
44
44
7,383
43
43
6,198
35
35
6,305
32
32
7,792
30
30

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.99 2.80 2.68 2.44 2.36 2.05 1.42 1.58
700
2.87 2.76 2.60 2.40 2.32 2.05 1.46 1.59
700
2.60 2.48 2.40 2.17 2.09 1.85 1.30 1.59
700
2.24 2.13 2.01 1.81 1.69 1.46 1.02 1.60
700
2.24 2.13 2.01 1.81 1.69 1.46 1.02 1.60
700
2.40 2.24 2.09 1.93 1.81 1.57 1.10 1.60
700
2.72 2.52 2.40 2.24 2.17 1.89 1.34 1.60
700
2.60 2.48 2.32 2.17 2.05 1.73 1.14 1.60
700
2.60 2.48 2.32 2.17 2.05 1.73 1.14 1.60
700
2.28 2.09 2.05 1.85 1.77 1.54 1.06 1.61
700
2.36 2.20 2.09 1.89 1.81 1.54 1.02 1.61
700
3.07 2.91 2.76 2.52 2.44 2.13 1.54 1.61
700
4.17 3.62 3.27 2.83 2.56 1.97 1.14 1.61
700
2.64 2.44 2.32 2.13 2.05 1.77 1.26 1.61
700
2.28 2.17 2.05 1.89 1.77 1.57 1.06 1.61
700
2.99 2.83 2.68 2.44 2.28 2.01 1.42 1.62
700
2.83 2.72 2.56 2.36 2.28 2.01 1.42 1.62
700
2.95 2.76 2.64 2.40 2.32 2.01 1.46 1.62
700
2.72 2.56 2.44 2.24 2.13 1.89 1.30 1.62
700
2.95 2.76 2.64 2.44 2.36 2.09 1.54 1.62
700
2.99 2.83 2.72 2.48 2.40 2.13 1.57 1.62
700
2.52 2.36 2.24 2.01 1.93 1.65 1.14 1.62
700
2.72 2.52 2.40 2.17 2.09 1.77 1.26 1.63
700
3.07 2.99 2.83 2.60 2.52 2.24 1.61 1.63
700
197

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
6,333
32
32
7,347
30
30
7,781
34
34
7,174
44
44
7,207
45
45
7,071
41
41
7,686
33
33
5,727
39
39
5,739
39
39
7,871
42
42
6,440
44
44
6,799
29
29
1,704
39
39
7,363
36
36
7,583
42
42
6,099
32
32
7,321
32
32
6,967
31
31
6,928
34
34
8,000
29
29
7,821
28
28
6,529
40
40
6,552
37
37
7,246
27
27

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
3.31 3.07 2.95 2.72 2.64 2.32 1.69 1.63
700
3.19 2.91 2.72 2.44 2.28 1.89 1.18 1.63
700
2.32 2.24 2.09 1.89 1.77 1.50 0.98 1.64
700
2.64 2.56 2.44 2.24 2.13 1.89 1.30 1.64
700
2.52 2.48 2.32 2.13 2.01 1.69 1.14 1.65
700
2.99 2.83 2.68 2.44 2.36 2.05 1.42 1.65
700
2.40 2.28 2.13 1.93 1.77 1.54 1.02 1.65
700
2.56 2.44 2.28 2.09 1.97 1.73 1.18 1.65
700
2.87 2.72 2.60 2.36 2.28 2.01 1.42 1.66
700
3.46 3.39 3.23 2.99 2.95 2.60 1.89 1.66
700
2.91 2.72 2.56 2.36 2.24 1.97 1.38 1.66
700
2.52 2.36 2.24 2.05 1.97 1.73 1.22 1.67
700
2.52 2.36 2.24 2.05 1.97 1.73 1.22 1.67
700
2.48 2.36 2.20 2.01 1.93 1.65 1.18 1.67
700
2.99 2.83 2.68 2.48 2.40 2.13 1.57 1.67
700
3.35 3.27 3.11 2.91 2.80 2.56 1.85 1.67
700
3.07 2.95 2.80 2.56 2.48 2.20 1.57 1.67
700
3.94 3.39 3.11 2.68 2.40 1.89 1.10 1.68
700
2.44 2.28 2.17 1.97 1.89 1.65 1.14 1.68
700
3.11 2.99 2.83 2.60 2.56 2.24 1.65 1.68
700
2.87 2.72 2.60 2.36 2.28 2.01 1.46 1.68
700
2.95 2.83 2.68 2.48 2.36 2.13 1.50 1.68
700
2.68 2.56 2.48 2.24 2.17 1.89 1.30 1.69
700
2.40 2.36 2.20 2.01 1.93 1.65 1.14 1.70
700
198

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
6,823
26
26
3,630
38
38
5,815
45
45
7,164
34
34
6,115
40
40
6,141
32
32
5,866
44
44
6,579
38
38
7,044
32
32
7,041
23
23
6,504
33
33
7,710
37
37
7,654
36
36
7,338
39
39
7,920
28
28
7,601
23
23
6,926
28
28
1,831
40
40
7,357
39
39
7,685
27
27
7,384
30
30
7,388
30
30
6,899
34
34
7,066
39
39

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.44 2.28 2.17 1.97 1.89 1.57 1.02 1.70
700
2.87 2.72 2.60 2.36 2.32 2.01 1.46 1.70
700
1.93 1.77 1.65 1.54 1.42 1.14 0.71 1.70
700
2.95 2.80 2.72 2.48 2.40 2.17 1.57 1.70
700
2.83 2.72 2.56 2.36 2.24 2.01 1.42 1.70
700
2.72 2.60 2.44 2.24 2.13 1.89 1.34 1.70
700
3.03 2.87 2.72 2.52 2.48 2.17 1.57 1.71
700
2.48 2.32 2.17 1.97 1.89 1.57 1.02 1.71
700
2.76 2.68 2.52 2.36 2.24 1.97 1.34 1.71
700
2.40 2.20 2.13 1.93 1.85 1.61 1.10 1.71
700
2.56 2.40 2.24 2.01 1.93 1.61 1.06 1.71
700
2.52 2.36 2.20 2.01 1.93 1.65 1.14 1.72
700
2.64 2.48 2.36 2.13 2.05 1.69 1.10 1.72
700
2.36 2.20 2.05 1.89 1.77 1.54 1.02 1.72
700
2.52 2.36 2.28 2.05 2.01 1.73 1.22 1.72
700
2.76 2.56 2.44 2.28 2.20 1.93 1.34 1.72
700
2.68 2.52 2.40 2.20 2.13 1.85 1.26 1.73
700
3.11 2.91 2.80 2.60 2.52 2.24 1.57 1.73
700
2.91 2.80 2.64 2.44 2.36 2.09 1.46 1.73
700
2.99 2.80 2.68 2.48 2.36 2.13 1.57 1.74
700
3.54 3.46 3.31 3.03 2.95 2.64 1.89 1.75
700
3.11 2.95 2.80 2.56 2.48 2.20 1.57 1.77
700
2.64 2.60 2.40 2.20 2.09 1.81 1.26 1.78
700
2.32 2.20 2.01 1.89 1.81 1.54 1.06 1.78
700
199

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
5,688
44
44
7,360
30
30
5,661
62
62
8,000
28
28
7,273
31
31
7,268
33
33
7,426
28
28
5,486
44
44
6,739
33
33
7,344
41
41
5,438
43
43
6,732
40
40
5,259
41
41
6,536
44
44
7,559
36
36
7,345
33
33
6,831
36
36
7,053
28
28
7,028
30
30
7,947
28
28
6,575
23
23
6,926
29
29
6,592
36
36
7,254
42
42

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.56 2.40 2.24 2.05 1.93 1.65 1.06 1.79
700
2.52 2.36 2.17 1.97 1.89 1.57 1.06 1.79
700
2.95 2.80 2.64 2.44 2.36 2.09 1.46 1.79
700
2.36 2.20 2.09 1.93 1.77 1.54 0.98 1.80
700
3.11 2.91 2.76 2.52 2.44 2.13 1.54 1.81
700
2.80 2.64 2.52 2.32 2.24 2.01 1.42 1.81
700
2.80 2.64 2.48 2.28 2.20 1.93 1.34 1.81
700
2.83 2.68 2.56 2.32 2.20 1.97 1.38 1.81
700
3.23 2.87 2.68 2.40 2.24 1.85 1.18 1.82
700
2.28 2.17 2.01 1.81 1.65 1.42 0.91 1.82
700
2.52 2.36 2.24 2.01 1.93 1.65 1.18 1.83
700
2.83 2.72 2.56 2.32 2.24 1.93 1.30 1.83
700
2.87 2.68 2.56 2.32 2.24 1.97 1.38 1.83
700
3.19 3.11 2.95 2.68 2.64 2.32 1.69 1.84
700
3.98 3.43 3.11 2.68 2.40 1.89 1.10 1.84
700
2.91 2.80 2.64 2.44 2.40 2.13 1.54 1.85
700
2.68 2.52 2.36 2.17 2.09 1.81 1.22 1.85
700
3.50 3.39 3.23 2.99 2.91 2.64 1.89 1.85
700
2.76 2.60 2.48 2.28 2.20 1.97 1.38 1.85
700
2.91 2.80 2.64 2.40 2.36 2.05 1.46 1.86
700
3.11 2.76 2.56 2.28 2.09 1.73 1.06 1.86
700
2.64 2.44 2.36 2.13 2.09 1.81 1.30 1.89
700
3.15 3.03 2.87 2.64 2.56 2.32 1.69 1.90
700
2.87 2.72 2.56 2.36 2.24 2.01 1.46 1.90
700
200

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
5,507
43
43
5,683
43
43
7,105
31
31
5,926
46
46
6,676
29
29
7,797
31
31
6,863
34
34
6,893
33
33
3,556
38
38
5,385
49
49
7,003
39
39
5,781
34
34
6,883
33
33
7,107
26
26
1,785
40
40
8,000
28
28
6,356
37
37
7,019
23
23
7,743
32
32
6,988
30
30
3,216
42
42
7,781
34
34
7,690
26
26
7,598
31
31

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.21 3.62 3.31 2.83 2.56 2.01 1.18 1.91
700
3.07 2.99 2.83 2.56 2.48 2.20 1.61 1.91
700
3.11 2.95 2.76 2.52 2.40 2.09 1.38 1.92
700
2.68 2.60 2.48 2.32 2.20 1.97 1.34 1.93
700
2.64 2.48 2.32 2.09 2.01 1.73 1.18 1.93
700
3.03 2.83 2.72 2.44 2.32 2.05 1.46 1.93
700
3.03 2.87 2.72 2.48 2.44 2.13 1.50 1.93
700
2.91 2.76 2.64 2.40 2.32 2.09 1.50 1.95
700
2.99 2.83 2.68 2.48 2.40 2.17 1.57 1.95
700
2.91 2.64 2.44 2.17 2.05 1.69 1.10 1.96
700
2.91 2.64 2.44 2.17 2.05 1.69 1.10 1.96
700
3.62 3.31 2.99 2.56 2.36 1.85 1.14 1.96
700
2.83 2.60 2.44 2.28 2.20 1.89 1.38 1.98
700
3.15 2.87 2.72 2.44 2.28 1.97 1.34 1.98
700
2.72 2.64 2.52 2.28 2.24 1.97 1.38 1.98
700
3.62 3.15 2.91 2.52 2.28 1.81 1.14 1.98
700
4.37 3.78 3.39 2.95 2.68 2.09 1.22 1.98
700
3.27 3.15 2.95 2.76 2.68 2.44 1.77 2.00
700
3.46 3.27 3.07 2.87 2.72 2.48 1.77 2.00
700
2.48 2.28 2.17 1.97 1.93 1.65 1.14 2.01
700
2.76 2.60 2.48 2.24 2.20 1.93 1.38 2.01
700
3.23 3.03 2.83 2.64 2.52 2.20 1.65 2.01
700
2.64 2.48 2.40 2.17 2.13 1.85 1.26 2.02
700
3.19 3.07 2.87 2.64 2.56 2.28 1.69 2.02
700
201

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,770
38
38
7,239
28
28
5,036
32
32
7,304
32
32
6,050
38
38
6,373
31
31
6,645
29
29
7,766
30
30
8,000
28
28
4,130
42
42
4,095
41
41
2,283
39
39
7,277
33
33
4,766
34
34
7,578
32
32
2,431
40
40
1,678
36
36
7,876
25
25
6,613
25
25
7,179
39
39
7,547
32
32
6,860
27
27
7,076
35
35
7,328
26
26

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.28 2.13 2.01 1.85 1.77 1.57 1.06 2.04
700
3.11 2.91 2.80 2.60 2.56 2.28 1.61 2.04
700
2.80 2.60 2.44 2.24 2.17 1.89 1.30 2.04
700
2.87 2.72 2.56 2.32 2.24 1.97 1.42 2.04
700
4.61 3.98 3.66 3.15 2.87 2.28 1.38 2.05
700
2.44 2.28 2.13 1.97 1.89 1.65 1.10 2.06
700
2.36 2.20 2.05 1.89 1.77 1.57 1.10 2.06
700
2.87 2.64 2.52 2.32 2.24 1.97 1.46 2.07
700
3.03 2.83 2.64 2.36 2.20 1.89 1.30 2.07
700
3.54 3.15 2.83 2.48 2.24 1.81 1.10 2.07
700
2.68 2.60 2.48 2.32 2.24 1.97 1.34 2.07
700
2.09 1.97 1.81 1.65 1.54 1.34 0.87 2.08
700
2.40 2.24 2.13 1.89 1.85 1.57 1.10 2.09
700
2.87 2.68 2.48 2.28 2.20 1.89 1.26 2.11
700
3.07 2.91 2.76 2.48 2.44 2.13 1.50 2.12
700
2.32 2.24 2.09 1.85 1.77 1.50 0.98 2.12
700
2.60 2.44 2.32 2.05 1.97 1.69 1.10 2.12
700
2.28 2.17 2.05 1.85 1.73 1.46 0.91 2.12
700
3.03 2.80 2.60 2.36 2.24 1.89 1.34 2.13
700
3.07 2.95 2.76 2.52 2.40 2.13 1.42 2.13
700
3.46 3.27 3.11 2.83 2.72 2.44 1.81 2.13
700
2.68 2.60 2.48 2.28 2.20 1.97 1.34 2.14
700
3.07 2.83 2.60 2.36 2.17 1.85 1.26 2.14
700
3.23 3.03 2.83 2.60 2.52 2.20 1.61 2.16
700
202

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
7,863
41
41
7,566
27
27
6,466
34
34
7,114
32
32
1,788
33
33
6,910
40
40
7,866
42
42
7,993
31
31
4,891
35
35
2,382
40
40
7,354
32
32
6,686
51
51
7,106
41
41
5,692
36
36
6,355
29
29
5,858
45
45
5,531
41
41
5,356
48
48
5,275
34
34
5,584
31
31
6,821
25
25
7,428
32
32
4,516
37
37
6,564
28
28

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.99 2.99 2.76 2.48 2.32 1.97 1.34 2.16
700
2.91 2.80 2.64 2.40 2.36 2.09 1.46 2.18
700
2.91 2.80 2.64 2.36 2.28 1.97 1.30 2.18
700
2.32 2.17 2.05 1.85 1.73 1.50 0.94 2.18
700
2.52 2.36 2.20 2.01 1.93 1.65 1.06 2.20
700
3.74 3.23 2.95 2.56 2.32 1.85 1.14 2.20
700
3.27 3.11 2.95 2.68 2.64 2.36 1.73 2.21
700
3.43 2.99 2.80 2.44 2.28 1.81 1.18 2.22
700
3.54 3.27 2.95 2.52 2.32 1.85 1.14 2.23
700
2.17 2.05 1.93 1.73 1.65 1.46 0.98 2.23
700
3.43 3.23 3.03 2.80 2.76 2.44 1.73 2.23
700
2.28 2.13 2.05 1.81 1.77 1.54 1.06 2.24
700
4.61 3.98 3.66 3.19 2.91 2.32 1.46 2.25
700
3.15 3.19 2.95 2.68 2.56 2.20 1.61 2.26
700
2.87 2.80 2.60 2.36 2.28 1.93 1.26 2.26
700
2.24 2.09 1.97 1.77 1.73 1.50 1.02 2.27
700
3.31 3.07 2.91 2.64 2.52 2.24 1.61 2.27
700
3.58 3.23 2.95 2.48 2.28 1.81 1.10 2.27
700
3.15 3.19 2.95 2.68 2.60 2.20 1.61 2.27
700
3.11 2.87 2.68 2.40 2.20 1.85 1.30 2.28
700
3.11 2.80 2.60 2.36 2.20 1.89 1.26 2.29
700
2.91 2.72 2.52 2.32 2.24 1.97 1.38 2.29
700
2.48 2.28 2.13 1.97 1.85 1.61 1.02 2.30
700
3.70 3.23 2.95 2.60 2.40 1.93 1.22 2.30
700
203

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
4,792
33
33
7,068
30
30
5,380
34
34
5,649
46
46
5,823
42
42
2,244
40
40
7,509
26
26
2,982
39
39
2,390
39
39
7,752
46
46
6,462
26
26
7,845
43
43
1,980
32
32
6,068
28
28
5,136
35
35
7,763
44
44
6,069
28
28
2,232
40
40
6,067
28
28
4,503
36
36
4,546
36
36
6,737
33
33
5,727
43
43
2,602
37
37

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.04 4.41 4.02 3.50 3.19 2.56 1.61 2.31
700
3.07 2.99 2.83 2.56 2.52 2.28 1.65 2.31
700
3.43 3.07 2.80 2.44 2.20 1.81 1.14 2.31
700
2.20 2.05 1.89 1.73 1.65 1.42 0.91 2.32
700
3.43 3.27 2.95 2.64 2.44 2.05 1.38 2.33
700
2.76 2.60 2.48 2.24 2.20 1.97 1.38 2.35
700
3.74 3.66 3.35 2.91 2.68 2.17 1.38 2.36
700
2.32 2.20 2.09 1.85 1.77 1.57 1.10 2.37
700
2.76 2.60 2.48 2.20 2.13 1.89 1.30 2.37
700
5.04 4.69 4.45 4.09 3.86 3.46 2.60 2.38
700
2.91 2.72 2.60 2.36 2.32 2.09 1.50 2.39
700
4.09 3.50 3.19 2.76 2.48 1.93 1.06 2.39
700
2.20 2.09 1.97 1.77 1.73 1.46 0.94 2.40
700
3.66 3.23 2.95 2.64 2.44 2.01 1.30 2.43
700
2.68 2.56 2.44 2.17 2.13 1.89 1.30 2.44
700
3.03 2.87 2.72 2.44 2.44 2.13 1.54 2.44
700
2.99 2.99 2.76 2.44 2.32 1.93 1.34 2.44
700
2.36 2.20 2.05 1.85 1.77 1.54 1.10 2.45
700
2.95 2.80 2.64 2.40 2.36 2.13 1.54 2.47
700
3.07 2.80 2.60 2.36 2.17 1.89 1.30 2.47
700
3.03 2.80 2.64 2.36 2.24 1.97 1.38 2.48
700
5.08 4.37 4.02 3.50 3.23 2.60 1.61 2.48
700
2.72 2.60 2.48 2.20 2.20 1.93 1.38 2.50
700
3.70 3.15 2.87 2.52 2.28 1.85 1.10 2.55
700
204

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,813
29
29
7,911
27
27
2,712
39
39
6,428
49
49
3,702
34
34
7,844
33
33
2,714
33
33
7,740
41
41
6,547
34
34
4,591
18
18
8,000
29
29
1,605
40
40
6,536
47
47
3,066
36
36
7,059
34
34
7,160
29
29
4,759
34
34
7,664
42
42
7,878
28
28
4,932
36
36
5,698
33
33
1,827
28
28
7,802
32
32
2,294
41
41

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.96 4.61 4.37 3.98 3.82 3.39 2.56 2.56
700
3.07 2.80 2.60 2.24 2.13 1.77 1.14 2.57
700
3.70 3.66 3.35 2.91 2.68 2.17 1.38 2.58
700
4.57 3.98 3.62 3.15 2.87 2.32 1.46 2.60
700
3.74 3.27 3.03 2.60 2.40 1.97 1.22 2.61
700
3.15 3.15 2.95 2.60 2.52 2.20 1.57 2.62
700
2.87 2.87 2.68 2.36 2.17 1.77 1.14 2.63
700
3.35 3.31 2.99 2.64 2.52 2.09 1.42 2.63
700
5.16 4.49 4.09 3.54 3.23 2.64 1.61 2.63
700
4.02 3.74 3.46 3.19 2.95 2.64 1.89 2.66
700
3.03 3.03 2.76 2.44 2.32 1.97 1.34 2.67
700
3.94 4.06 3.74 3.39 3.19 2.80 1.97 2.67
700
1.93 1.81 1.65 1.50 1.42 1.18 0.71 2.67
700
3.82 3.43 3.15 2.80 2.60 2.17 1.46 2.67
700
4.72 4.88 4.57 4.13 3.94 3.50 2.64 2.68
700
2.95 2.72 2.60 2.32 2.24 2.01 1.42 2.69
700
3.03 3.11 2.91 2.60 2.44 2.09 1.50 2.69
700
4.69 4.06 3.66 3.15 2.87 2.32 1.38 2.70
700
3.03 2.99 2.80 2.44 2.28 1.89 1.18 2.71
700
4.37 3.90 3.58 3.15 2.95 2.44 1.61 2.72
700
4.61 3.98 3.62 3.11 2.87 2.28 1.42 2.72
700
4.06 3.74 3.46 3.15 2.99 2.64 1.85 2.72
700
3.11 2.80 2.60 2.24 2.17 1.77 1.14 2.74
700
3.07 2.99 2.80 2.40 2.28 1.89 1.18 2.75
700
205

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
4,701
18
18
3,749
40
40
2,759
33
33
2,030
32
32
2,508
37
37
5,835
28
28
3,871
39
39
3,985
32
32
1,716
28
28
4,702
25
25
4,678
34
34
4,586
23
23
5,779
62
62
3,212
32
32
4,887
17
17
6,767
32
32
5,666
30
30
1,721
32
32
3,678
38
38
2,673
29
29
1,875
32
32
4,459
25
25
3,696
40
40
3,610
38
38

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-09-08-2004
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
2.83 2.83 2.64 2.32 2.13 1.73 1.10 2.75
700
2.99 2.99 2.87 2.60 2.36 2.01 1.30 2.77
700
2.95 2.99 2.68 2.40 2.28 1.89 1.30 2.78
700
3.19 2.91 2.72 2.48 2.36 2.05 1.50 2.78
700
3.50 3.07 2.83 2.48 2.28 1.81 1.22 2.80
700
3.54 3.11 2.87 2.48 2.32 1.89 1.22 2.80
700
3.39 2.95 2.76 2.36 2.20 1.81 1.14 2.81
700
2.99 3.11 2.87 2.60 2.44 2.09 1.50 2.81
700
3.86 3.43 3.19 2.80 2.60 2.17 1.46 2.83
700
3.70 3.70 3.35 2.91 2.72 2.20 1.42 2.83
700
3.86 4.02 3.74 3.39 3.19 2.76 1.93 2.84
700
3.11 2.80 2.56 2.28 2.17 1.81 1.22 2.86
700
2.95 3.07 2.83 2.56 2.40 2.09 1.46 2.89
700
3.39 2.99 2.76 2.40 2.20 1.85 1.18 2.89
700
2.80 2.83 2.64 2.32 2.13 1.77 1.14 2.89
700
3.03 3.03 2.91 2.64 2.44 2.01 1.30 2.93
700
2.95 2.80 2.64 2.36 2.28 1.97 1.22 2.94
700
4.57 3.98 3.62 3.11 2.87 2.32 1.46 2.95
700
2.56 2.44 2.28 2.20 2.13 1.81 1.18 2.97
700
3.98 3.82 3.46 2.99 2.68 2.05 1.18 2.97
700
3.03 2.99 2.80 2.40 2.28 1.89 1.18 2.97
700
3.31 3.31 3.03 2.60 2.40 1.93 1.26 2.99
700
18.98 17.56 16.81 15.63 14.49 12.05 8.31 0.35
700
15.31 14.09 13.58 12.60 11.65 9.69 6.69 0.44
700
206

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
3,772
41
41
4,499
35
35
4,731
35
35
6,005
31
31
2,945
38
38
2,904
37
37
2,968
40
40
5,853
30
30
3,144
32
32
2,884
32
32
4,509
23
23
4,249
38
38
5,793
31
31
3,185
40
40
4,109
39
39
4,312
35
35
4,622
36
36
2,032
32
32
6,787
37
37
1,755
36
36
3,719
38
38
3,116
36
36
1,898
12
12
1,835
12
12

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
6.18 5.55 5.24 4.76 4.29 3.46 2.20 0.45
700
6.02 5.43 5.04 4.57 4.09 3.31 2.09 0.73
700
6.10 5.51 5.16 4.69 4.17 3.39 2.09 0.76
700
4.69 4.17 3.90 3.50 3.19 2.52 1.57 0.76
700
8.39 7.56 6.97 6.14 5.43 4.29 2.60 0.79
700
11.89 10.67 10.12 9.17 8.31 6.61 4.09 0.82
700
8.15 7.60 7.13 6.61 6.06 5.08 3.31 0.83
700
6.61 6.02 5.59 5.08 4.61 3.70 2.28 0.86
700
14.84 13.39 12.64 11.54 10.43 8.35 5.16 0.89
700
8.43 7.60 7.01 6.18 5.43 4.29 2.64 0.92
700
5.71 5.12 4.80 4.37 3.90 3.19 1.97 0.92
700
3.31 3.11 2.99 2.80 2.60 2.28 1.57 0.93
700
3.31 3.11 2.99 2.80 2.60 2.28 1.57 0.93
700
7.32 6.77 6.34 5.91 5.43 4.57 2.99 0.95
700
5.75 5.12 4.80 4.37 3.90 3.19 2.01 0.96
700
6.06 5.47 5.08 4.69 4.17 3.39 2.09 0.96
700
6.06 5.47 5.08 4.69 4.21 3.43 2.13 0.98
700
6.14 5.55 5.16 4.76 4.29 3.54 2.24 1.01
700
6.46 5.87 5.47 5.08 4.53 3.78 2.44 1.02
700
7.05 6.42 6.06 5.63 5.12 4.33 2.91 1.02
700
6.10 5.55 5.16 4.76 4.25 3.54 2.28 1.03
700
5.71 5.12 4.80 4.41 4.02 3.31 2.13 1.05
700
8.46 7.60 7.01 6.14 5.43 4.25 2.64 1.05
700
6.69 6.02 5.67 5.12 4.65 3.74 2.28 1.06
700
207

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,831
21
21
1,798
22
22
1,732
22
22
2,195
29
29
1,064
17
17
1,563
19
19
1,709
14
14
1,621
20
20
1,616
19
19
1,068
17
17
1,900
23
23
5,856
29
29
5,918
29
29
1,975
15
15
1,939
23
23
1,773
22
22
1,840
21
21
1,949
20
20
1,947
19
19
2,123
16
16
2,029
20
20
2,199
21
21
1,056
17
17
1,600
20
20

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.69 4.17 3.86 3.50 3.19 2.52 1.54 1.08
700
3.98 3.62 3.35 3.07 2.76 2.28 1.42 1.10
700
8.82 8.15 7.68 7.20 6.65 5.71 3.82 1.11
700
7.28 6.73 6.34 5.91 5.39 4.57 2.95 1.12
700
7.24 6.69 6.30 5.87 5.39 4.65 3.15 1.13
700
6.69 6.06 5.67 5.08 4.53 3.50 2.09 1.14
700
6.50 5.83 5.43 4.84 4.33 3.35 1.97 1.16
700
6.61 5.94 5.63 5.08 4.57 3.70 2.24 1.16
700
6.10 5.43 5.08 4.69 4.17 3.43 2.13 1.17
700
5.87 5.28 4.92 4.57 4.13 3.43 2.20 1.17
700
3.70 3.46 3.35 3.11 2.87 2.44 1.61 1.19
700
5.75 5.12 4.80 4.37 3.90 3.23 2.01 1.23
700
6.38 5.75 5.35 4.96 4.49 3.74 2.44 1.24
700
3.66 3.43 3.31 3.07 2.83 2.44 1.61 1.24
700
6.50 5.71 5.20 4.69 4.17 3.31 2.01 1.25
700
3.31 3.11 3.03 2.80 2.60 2.28 1.54 1.26
700
5.71 5.08 4.76 4.41 4.02 3.31 2.13 1.28
700
4.57 4.06 3.74 3.43 3.03 2.48 1.54 1.30
700
5.20 4.61 4.25 3.86 3.46 2.80 1.77 1.30
700
5.20 4.61 4.25 3.86 3.46 2.80 1.77 1.30
700
6.46 5.83 5.43 4.88 4.33 3.35 1.97 1.31
700
4.65 4.06 3.78 3.43 3.07 2.48 1.54 1.34
700
5.12 4.53 4.21 3.82 3.43 2.72 1.61 1.34
700
5.83 5.24 4.88 4.57 4.09 3.43 2.20 1.35
700
208

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
2,133
29
29
1,780
20
20
1,862
12
12
1,951
15
15
2,275
14
14
1,308
21
21
1,307
22
22
1,579
20
20
1,836
21
21
2,167
21
21
4,286
28
28
1,962
23
23
2,072
19
19
4,540
28
28
1,420
22
22
5,626
30
30
2,235
21
21
2,318
30
30
2,069
26
26
2,079
26
26
1,327
22
22
2,243
29
29
1,827
27
27
2,209
21
21

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
6.54 5.87 5.43 4.88 4.33 3.39 1.97 1.37
700
5.87 5.24 4.92 4.53 4.09 3.43 2.20 1.37
700
6.65 6.02 5.63 5.12 4.61 3.78 2.28 1.37
700
3.62 3.43 3.31 3.07 2.83 2.44 1.61 1.38
700
4.80 4.17 3.86 3.54 3.15 2.52 1.54 1.39
700
6.54 5.67 5.20 4.69 4.17 3.31 2.01 1.40
700
7.32 6.77 6.34 5.91 5.39 4.61 2.95 1.40
700
4.96 4.41 4.09 3.74 3.35 2.76 1.69 1.41
700
4.25 3.70 3.46 3.15 2.83 2.28 1.38 1.45
700
5.75 5.12 4.76 4.41 3.98 3.31 2.13 1.47
700
4.25 3.70 3.46 3.15 2.80 2.28 1.38 1.49
700
4.80 4.21 3.86 3.54 3.15 2.52 1.50 1.49
700
5.12 4.49 4.17 3.82 3.39 2.72 1.61 1.50
700
6.85 6.10 5.63 5.08 4.45 3.43 1.97 1.50
700
4.69 4.17 3.90 3.58 3.27 2.68 1.65 1.51
700
6.57 5.71 5.24 4.69 4.17 3.31 2.05 1.51
700
6.81 6.06 5.63 5.04 4.45 3.43 1.97 1.51
700
4.84 4.21 3.86 3.54 3.19 2.52 1.54 1.52
700
4.84 4.29 3.94 3.58 3.19 2.56 1.50 1.53
700
4.80 4.21 3.98 3.58 3.19 2.56 1.50 1.56
700
4.76 4.33 4.06 3.78 3.46 2.99 1.97 1.58
700
4.61 4.06 3.74 3.39 3.03 2.48 1.54 1.58
700
4.84 4.25 3.94 3.54 3.19 2.56 1.50 1.63
700
5.63 5.00 4.65 4.13 3.66 2.83 1.61 1.63
700
209

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,309
22
22
2,194
21
21
1,627
20
20
4,597
28
28
2,063
29
29
1,416
22
22
1,939
15
15
2,176
27
27
2,397
33
33
2,183
21
21
2,396
33
33
1,960
29
29
1,857
27
27
1,163
22
22
2,453
27
27
1,434
22
22
1,174
22
22
2,008
29
29
1,921
30
30
1,961
30
30
3,229
23
23
2,299
30
30
1,930
30
30
1,407
27
27

Table A.1 (Cont'd)

File Title
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001
rigid-G-M6-CS41064-11-15-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.65 4.17 3.90 3.54 3.15 2.60 1.54 1.64
700
5.63 5.00 4.61 4.13 3.66 2.83 1.61 1.65
700
4.65 4.13 3.86 3.58 3.27 2.68 1.65 1.67
700
4.80 4.33 4.06 3.82 3.46 2.99 1.97 1.68
700
4.96 4.45 4.06 3.74 3.39 2.80 1.73 1.69
700
5.63 4.96 4.61 4.13 3.66 2.83 1.61 1.70
700
5.43 4.84 4.53 4.06 3.58 2.87 1.65 1.70
700
5.20 4.57 4.21 3.82 3.43 2.80 1.77 1.71
700
4.96 4.37 4.09 3.74 3.35 2.76 1.65 1.74
700
4.06 3.54 3.23 2.83 2.48 1.85 1.02 1.76
700
4.69 4.13 3.86 3.58 3.23 2.68 1.65 1.76
700
4.84 4.33 4.06 3.82 3.46 2.91 2.01 1.78
700
5.43 5.12 4.69 4.49 4.06 3.58 2.44 1.79
700
4.72 4.21 3.94 3.58 3.19 2.52 1.46 1.80
700
5.12 4.53 4.21 3.86 3.39 2.72 1.57 1.83
700
5.43 4.88 4.57 4.09 3.66 2.87 1.65 1.85
700
6.69 6.06 5.71 5.12 4.53 3.54 2.05 1.86
700
4.72 4.25 3.94 3.62 3.19 2.52 1.46 1.86
700
4.96 4.53 4.21 3.82 3.43 2.76 1.61 1.88
700
4.25 3.70 3.46 3.15 2.83 2.32 1.38 1.88
700
4.13 3.54 3.31 2.87 2.52 1.93 1.06 1.90
700
5.00 4.49 4.17 3.82 3.39 2.72 1.57 1.98
700
6.85 6.14 5.63 5.04 4.45 3.46 1.93 2.11
700
4.80 4.25 3.98 3.58 3.23 2.56 1.46 2.12
700
210

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
2,193
29
29
1,405
27
27
2,521
27
27
3,184
23
23
2,272
26
26
1,421
27
27
1,622
26
26
2,104
26
26
2,108
27
27
1,637
42
42
2,495
27
27
3,186
23
23
1,938
11
11
1,899
30
30
1,750
28
28
1,594
26
26
1,282
21
21
1,873
30
30
1,931
27
27
2,424
32
32
1,699
41
41
1,852
28
28
1,119
22
22
1,863
30
30

Table A.1 (Cont'd)
Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
File Title
Layer
(%)
0
8
12
18
24
36
60
(in)
rigid-G-M6-CS41064-11-15-2001
6.69 6.06 5.67 5.08 4.53 3.54 2.01 2.23
700
rigid-G-M6-CS41064-11-15-2001
4.96 4.49 4.21 3.78 3.43 2.80 1.61 2.29
700
rigid-G-M6-CS41064-11-15-2001
5.39 4.84 4.53 4.09 3.58 2.87 1.61 2.36
700
rigid-G-M6-CS41064-11-15-2001
4.09 3.54 3.27 2.87 2.48 1.93 1.02 2.75
700
rigid-G-M6-CS41064-11-15-2001
7.52 6.73 6.26 5.59 4.88 3.66 2.01 2.83
700
rigid-G-M6-CS41064-11-15-2001
7.52 6.77 6.26 5.55 4.88 3.70 2.01 2.89
700
rigid-G-M6-CS41064-11-15-2001
5.71 5.12 4.76 4.25 3.78 2.87 1.57 2.93
700
rigid-G-M6-CS41064-11-15-2001
7.52 6.77 6.26 5.59 4.88 3.70 2.01 2.96
700
rigid-G-US131-CS59012-04-09-1998
9.45 7.68 6.65 5.59 4.61 3.15 1.73 0.62
700
rigid-G-US131-CS59012-04-09-1998
9.33 7.56 6.57 5.59 4.57 3.11 1.65 0.86
700
rigid-G-US131-CS59012-04-09-1998
9.57 7.76 6.65 5.63 4.61 3.15 1.73 0.90
700
rigid-G-US131-CS59012-04-09-1998
8.27 7.05 6.26 5.39 4.41 3.03 1.61 0.93
700
rigid-G-US131-CS59012-04-09-1998
8.27 7.05 6.22 5.31 4.41 2.99 1.61 0.97
700
rigid-G-US131-CS59012-04-09-1998
8.35 7.05 6.26 5.39 4.41 2.99 1.57 0.97
700
rigid-G-US131-CS59012-04-09-1998 10.31 8.27 7.24 6.10 4.92 3.23 1.69 1.07
700
rigid-G-US131-CS59012-04-09-1998 10.24 8.19 7.17 6.10 4.84 3.23 1.65 1.16
700
rigid-G-US131-CS59012-04-09-1998
7.91 6.54 5.71 4.72 3.82 2.52 1.38 1.35
700
rigid-G-US131-CS59012-04-09-1998
7.83 6.50 5.71 4.72 3.82 2.52 1.38 1.45
700
rigid-G-US131-CS59012-04-09-1998
7.72 6.46 5.71 4.76 3.82 2.48 1.30 1.58
700
rigid-G-US131-CS59012-04-09-1998
7.64 6.42 5.63 4.76 3.82 2.48 1.30 1.63
700
rigid-G-US131-CS59012-04-09-1998
7.76 6.50 5.71 4.76 3.86 2.52 1.38 1.74
700
rigid-G-US131-CS59012-04-09-1998
7.64 6.42 5.67 4.72 3.82 2.48 1.34 1.81
700
rigid-G-US131-CS41131-07-11-1996-(2)6.12 5.37 4.99 4.38 3.90 3.06 2.00 2.58
700
rigid-G-US27-CS19033-06-15-1998
8.35 7.68 7.20 6.77 6.18 5.04 3.27 0.66
400
211

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,250
21
21
1,967
27
27
1,569
27
27
1,639
41
41
939
21
21
927
21
21
1,296
27
27
927
21
21
1,672
52
26
1,221
28
27
1,756
49
27
1,527
45
28
921
20
14
1,196
27
27
904
20
14
1,519
46
28
1,406
28
13
989
32
17
2,409
24
26
1,173
19
22
938
20
14
1,378
33
22
2,232
24
24
1,607
15
10

Table A.1 (Cont'd)

File Title
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-G-US27-CS19033-06-15-1998
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77023-07-02-1997

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
8.31 7.60 7.13 6.69 6.06 5.00 3.23 0.71
400
5.51 4.76 4.45 4.02 3.54 2.80 1.73 0.75
400
4.37 3.94 3.66 3.35 3.03 2.32 1.38 0.79
400
8.27 7.44 7.09 6.61 5.98 4.92 3.15 0.82
400
4.49 3.82 3.50 3.15 2.72 2.05 1.18 0.85
400
4.29 3.70 3.39 3.07 2.72 2.09 1.26 0.88
400
5.55 4.72 4.29 3.82 3.31 2.40 1.30 0.88
400
4.17 3.62 3.35 3.03 2.60 2.05 1.22 0.93
400
7.01 6.22 5.79 5.39 4.84 3.86 2.44 0.96
400
6.77 5.87 5.35 4.84 4.21 3.23 1.89 0.97
400
8.27 7.20 6.54 5.98 5.24 4.02 2.32 1.07
400
8.39 7.28 6.61 6.06 5.28 4.06 2.32 1.14
400
8.46 7.28 6.65 6.06 5.31 4.06 2.32 1.15
400
6.65 5.71 5.20 4.72 4.09 3.07 1.65 1.25
400
5.63 4.80 4.41 4.02 3.54 2.72 1.57 1.31
400
4.49 3.86 3.50 3.19 2.80 2.05 1.22 1.35
400
5.71 4.84 4.33 3.94 3.35 2.44 1.30 1.37
400
4.49 3.86 3.50 3.23 2.76 2.05 1.22 1.45
400
10.82 9.65 9.10 8.21 7.40 5.85 3.58 0.26
200
7.84 7.04 6.64 5.97 5.33 4.27 2.64 0.36
200
10.89 9.67 9.15 8.23 7.42 5.85 3.62 0.42
200
6.57 6.09 5.81 5.37 4.86 3.98 2.58 0.45
200
7.92 7.06 6.67 6.02 5.36 4.28 2.65 0.52
200
11.10 9.77 9.26 8.37 7.52 5.94 3.63 0.52
200
212

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,535
18
10
1,376
44
18
2,409
24
26
1,512
17
10
1,510
44
29
1,672
52
26
1,221
28
27
1,756
49
27
1,406
28
13
989
32
17
938
20
14
921
20
14
904
20
14
1,173
19
22
1,378
33
22
1,527
45
28
1,196
27
27
1,519
46
28
1,994
64
16
1,923
70
15
1,890
70
15
3,333
62
15
1,863
70
15
1,873
65
15

Table A.1 (Cont'd)

File Title
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77023-07-02-1997
rigid-M-I69-CS77023-07-02-1997
rigid-M-I75-CS82194-09-16-2008
rigid-M-I75-CS82194-09-16-208
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
17.14 14.94 13.86 12.31 10.79 8.28 4.49 0.54
200
6.72 6.19 5.94 5.45 4.94 4.04 2.60 0.54
200
6.53 6.02 5.83 5.32 4.85 3.98 2.57 0.55
200
17.03 14.80 13.81 12.26 10.71 8.22 4.46 0.57
200
20.93 18.17 17.12 15.00 13.42 10.08 5.58 0.70
200
20.86 18.15 17.12 14.92 13.39 10.04 5.54 0.76
200
17.10 14.80 13.88 12.28 10.74 8.21 4.45 0.80
200
20.91 18.17 17.18 14.97 13.47 10.07 5.61 0.85
200
3.55 3.10 2.97 2.84 2.64 2.30 1.60 1.79
700
4.32 3.95 3.83 3.69 3.53 3.20 2.43 1.28
700
4.57 4.13 3.95 3.64 3.29 2.76 1.82 0.70
700
7.05 6.57 6.42 5.94 5.42 4.57 3.16 0.74
700
4.60 4.16 3.97 3.69 3.31 2.77 1.82 0.76
700
7.06 6.49 6.39 5.91 5.40 4.56 3.12 0.86
700
7.06 6.51 6.41 5.91 5.39 4.56 3.14 0.89
700
4.60 4.12 3.99 3.66 3.29 2.75 1.80 0.94
700
3.21 2.75 2.63 2.41 2.19 1.81 1.20 1.41
700
7.23 6.30 6.17 5.77 5.30 4.55 3.21 1.59
700
7.24 6.28 6.15 5.76 5.29 4.54 3.24 1.61
700
7.63 6.41 6.20 5.59 4.98 4.00 2.55 1.62
700
11.81 10.22 9.80 9.05 8.24 6.84 4.42 1.62
700
10.57 9.10 8.78 8.05 7.36 6.08 3.95 1.64
700
3.22 2.73 2.63 2.41 2.18 1.83 1.22 1.69
700
10.65 9.20 8.81 8.13 7.42 6.15 3.95 1.71
700
213

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
781
20
10
3,139
60
16
3,510
58
16
789
20
10
851
22
10
859
22
10
777
19
10
855
22
10
2,652
85
22
3,477
84
13
2,860
46
22
2,481
19
13
2,883
41
22
2,525
17
13
2,446
20
13
2,850
42
23
2,837
120
32
1,618
65
11
1,559
72
11
1,095
40
15
946
23
9
1,024
26
10
2,733
135
31
1,054
24
10

Table A.1 (Cont'd)

File Title
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
10.78 9.15 8.70 7.90 7.09 5.62 3.36 1.71
700
7.66 6.43 6.20 5.59 5.03 4.08 2.60 1.72
700
7.66 6.44 6.20 5.61 5.02 4.08 2.58 1.73
700
10.72 9.25 8.84 8.17 7.45 6.15 3.93 1.73
700
7.43 6.15 5.77 5.20 4.64 3.61 2.19 1.74
700
7.25 6.30 6.19 5.84 5.30 4.55 3.22 1.74
700
10.82 9.18 8.84 8.03 7.13 5.69 3.40 1.75
700
10.86 9.22 8.85 8.05 7.18 5.72 3.40 1.78
700
11.94 10.28 9.86 9.12 8.31 6.92 4.47 1.79
700
6.61 5.50 5.29 4.82 4.37 3.63 2.43 1.79
700
7.68 6.51 6.09 5.59 4.99 4.01 2.43 1.81
700
3.15 2.69 2.57 2.39 2.14 1.81 1.19 1.82
700
11.95 10.24 9.80 9.07 8.29 6.88 4.48 1.82
700
6.76 5.60 5.25 4.74 4.21 3.35 2.03 1.84
700
10.89 9.20 8.82 8.01 7.16 5.68 3.38 1.84
700
7.15 5.95 5.59 5.08 4.49 3.61 2.20 1.85
700
6.69 5.62 5.31 4.98 4.46 3.65 2.43 1.86
700
7.33 6.09 5.72 5.13 4.55 3.59 2.11 1.87
700
11.72 10.02 9.65 8.84 8.00 6.48 3.95 1.89
700
7.68 6.44 6.04 5.50 4.85 3.88 2.30 1.89
700
3.35 2.85 2.71 2.53 2.29 1.96 1.32 1.90
700
7.65 6.42 6.05 5.44 4.84 3.85 2.24 1.92
700
7.62 6.49 6.04 5.55 4.95 4.02 2.41 1.94
700
11.75 10.02 9.63 8.88 7.98 6.46 3.93 1.94
700
214

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
922
16
12
1,116
42
15
1,126
39
15
1,051
22
10
1,026
36
18
1,675
63
11
957
15
12
971
14
12
936
23
9
1,145
74
15
1,196
30
16
2,924
128
32
873
26
9
1,116
43
19
945
15
12
1,104
41
18
1,231
63
16
1,075
32
19
1,015
12
11
1,128
29
17
2,576
150
28
1,157
25
18
1,239
28
17
989
13
11

Table A.1 (Cont'd)

File Title
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.96 3.96 3.74 3.18 2.90 2.16 1.33 1.95
700
8.33 6.99 6.70 6.14 5.43 4.35 2.64 1.96
700
6.76 5.59 5.25 4.78 4.20 3.33 1.99 1.98
700
7.44 6.16 5.72 5.23 4.62 3.63 2.17 1.98
700
10.87 9.16 8.70 7.90 7.10 5.69 3.40 1.98
700
6.84 5.67 5.34 4.94 4.44 3.61 2.34 1.99
700
4.64 3.85 3.71 3.45 3.11 2.61 1.79 2.00
700
7.65 6.50 6.07 5.59 4.97 4.00 2.36 2.01
700
10.84 9.15 8.75 7.97 7.12 5.74 3.41 2.03
700
10.90 9.17 8.80 7.99 7.16 5.68 3.34 2.03
700
7.68 6.45 6.07 5.51 4.86 3.90 2.26 2.05
700
11.75 9.97 9.69 8.88 8.00 6.51 4.00 2.05
700
8.33 6.94 6.66 6.09 5.42 4.35 2.67 2.08
700
5.91 4.86 4.54 4.11 3.61 2.86 1.68 2.10
700
8.40 7.04 6.77 6.19 5.48 4.41 2.64 2.10
700
8.89 7.37 6.97 6.35 5.68 4.49 2.70 2.12
700
8.12 6.85 6.49 6.01 5.34 4.35 2.64 2.13
700
6.69 5.60 5.31 4.94 4.43 3.67 2.36 2.14
700
6.96 5.78 5.43 4.94 4.39 3.46 2.02 2.15
700
4.60 3.80 3.61 3.36 3.04 2.55 1.71 2.15
700
8.82 7.32 6.96 6.32 5.66 4.47 2.66 2.16
700
5.42 4.39 4.16 3.71 3.30 2.54 1.50 2.17
700
7.22 5.97 5.62 5.12 4.53 3.65 2.20 2.17
700
5.45 4.43 4.13 3.74 3.27 2.55 1.49 2.17
700
215

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,111
71
29
1,147
25
15
1,165
38
20
1,033
35
18
898
18
12
1,111
59
16
1,621
123
21
1,240
26
17
949
16
12
940
14
12
1,179
25
18
995
14
10
1,094
29
15
1,303
43
24
1,192
22
15
984
26
15
1,237
26
15
1,307
55
16
1,247
30
20
1,587
120
22
1,015
24
15
1,353
47
26
1,056
42
18
1,314
47
26

Table A.1 (Cont'd)

File Title
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.08 5.86 5.59 5.10 4.52 3.64 2.21 2.18
700
6.98 5.78 5.54 5.04 4.48 3.61 2.20 2.18
700
6.82 5.64 5.33 4.90 4.43 3.63 2.32 2.19
700
7.06 5.84 5.57 5.09 4.50 3.65 2.23 2.20
700
5.58 4.58 4.28 3.86 3.43 2.70 1.58 2.22
700
7.18 5.93 5.60 5.07 4.54 3.64 2.19 2.22
700
5.94 4.90 4.55 4.13 3.68 2.88 1.68 2.22
700
3.97 3.40 3.32 3.13 2.91 2.49 1.73 2.22
700
5.51 4.58 4.37 3.97 3.50 2.78 1.60 2.23
700
4.20 3.46 3.27 3.04 2.68 2.20 1.40 2.23
700
8.04 6.76 6.41 5.91 5.30 4.31 2.61 2.24
700
7.02 5.82 5.45 4.95 4.40 3.54 2.09 2.27
700
5.14 4.20 3.97 3.61 3.21 2.60 1.60 2.27
700
8.12 6.85 6.46 5.96 5.31 4.35 2.60 2.28
700
4.57 4.06 3.91 3.88 3.55 3.15 2.26 2.29
700
8.86 7.34 6.96 6.34 5.67 4.47 2.62 2.30
700
5.98 4.92 4.56 4.15 3.68 2.90 1.69 2.30
700
11.77 9.90 9.59 8.86 7.95 6.49 3.97 2.33
700
7.23 5.99 5.75 5.25 4.69 3.72 2.21 2.34
700
6.99 5.76 5.40 4.90 4.31 3.42 1.96 2.34
700
5.22 4.20 3.93 3.56 3.12 2.51 1.52 2.34
700
4.75 4.10 4.07 3.89 3.58 3.14 2.24 2.34
700
5.52 4.56 4.38 3.98 3.49 2.78 1.61 2.34
700
6.66 5.53 5.25 4.79 4.26 3.42 2.01 2.35
700
216

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,226
37
18
1,218
38
18
1,119
58
16
1,212
39
18
1,345
46
25
1,128
38
18
1,334
39
24
2,947
121
21
1,735
29
26
1,808
92
27
1,255
26
15
1,166
36
19
1,446
66
24
1,229
26
15
4,158
74
16
1,032
21
15
1,320
40
24
965
15
10
1,338
26
18
1,213
29
21
1,268
67
25
3,059
98
16
1,724
31
26
1,397
30
20

Table A.1 (Cont'd)

File Title
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.65 3.73 3.55 3.15 2.78 2.16 1.26 2.36
700
6.67 5.52 5.26 4.79 4.26 3.42 2.02 2.37
700
6.72 5.57 5.20 4.80 4.23 3.42 2.04 2.37
700
6.62 5.46 5.22 4.76 4.20 3.36 1.98 2.37
700
5.59 4.56 4.30 3.87 3.42 2.69 1.55 2.37
700
11.71 9.86 9.62 8.86 7.96 6.52 3.97 2.38
700
4.26 3.50 3.30 3.07 2.73 2.22 1.40 2.38
700
6.96 5.77 5.35 4.91 4.31 3.42 1.95 2.40
700
4.80 4.13 4.09 3.93 3.64 3.17 2.29 2.40
700
6.86 5.65 5.35 4.93 4.41 3.61 2.25 2.41
700
3.99 3.39 3.32 3.14 2.90 2.53 1.77 2.42
700
3.68 3.06 2.95 2.76 2.51 2.13 1.43 2.43
700
7.21 6.00 5.78 5.30 4.71 3.77 2.20 2.43
700
5.58 4.54 4.24 3.85 3.40 2.68 1.56 2.45
700
3.41 2.79 2.66 2.47 2.20 1.81 1.16 2.45
700
5.37 4.38 4.16 3.83 3.41 2.77 1.73 2.45
700
7.05 5.82 5.47 5.00 4.43 3.55 2.07 2.46
700
4.03 3.42 3.33 3.18 2.92 2.55 1.79 2.47
700
4.87 4.20 4.07 3.95 3.68 3.22 2.31 2.48
700
4.98 3.97 3.75 3.34 2.94 2.32 1.36 2.51
700
4.67 3.84 3.72 3.47 3.14 2.64 1.77 2.51
700
5.19 4.24 4.01 3.69 3.27 2.66 1.63 2.51
700
5.19 4.13 3.86 3.44 3.05 2.33 1.34 2.52
700
3.64 3.03 2.89 2.72 2.47 2.08 1.37 2.54
700
217

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,556
55
32
1,382
31
20
1,228
39
19
1,385
31
20
1,412
40
26
1,024
13
10
1,856
84
27
1,260
27
21
2,989
104
15
1,179
49
17
2,851
138
20
2,378
137
26
1,467
20
19
1,357
45
25
2,308
117
33
1,438
66
22
1,255
30
19
2,662
146
20
2,782
114
15
1,347
61
29
1,709
112
21
1,500
63
24
1,286
50
29
2,449
124
27

Table A.1 (Cont'd)

File Title
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.32 4.35 4.13 3.81 3.38 2.75 1.69 2.55
700
5.68 4.57 4.27 3.82 3.38 2.59 1.45 2.56
700
4.59 4.03 3.93 3.88 3.57 3.20 2.30 2.56
700
4.04 3.42 3.34 3.16 2.94 2.53 1.75 2.57
700
7.09 5.80 5.44 5.00 4.39 3.51 2.05 2.58
700
5.43 4.37 4.12 3.68 3.23 2.55 1.45 2.60
700
5.50 4.53 4.30 3.91 3.49 2.77 1.58 2.61
700
4.94 4.34 3.61 3.28 2.89 2.31 1.41 2.62
700
5.22 4.16 3.87 3.48 3.04 2.37 1.35 2.63
700
5.24 4.28 4.00 3.72 3.29 2.69 1.65 2.66
700
3.85 3.30 3.25 3.14 2.92 2.58 1.85 2.68
700
5.18 4.12 3.87 3.46 3.04 2.35 1.33 2.68
700
7.12 5.82 5.50 5.00 4.47 3.54 2.04 2.69
700
5.38 4.38 4.13 3.82 3.38 2.74 1.66 2.70
700
3.37 2.74 2.62 2.42 2.16 1.81 1.15 2.73
700
3.66 3.03 2.92 2.71 2.51 2.11 1.39 2.74
700
4.59 4.03 3.82 3.84 3.53 3.13 2.26 2.75
700
5.70 4.59 4.32 3.87 3.37 2.63 1.44 2.75
700
5.21 4.19 3.92 3.55 3.14 2.51 1.46 2.80
700
4.73 3.76 3.55 3.18 2.75 2.16 1.20 2.86
700
4.67 3.68 3.49 3.14 2.73 2.12 1.21 2.87
700
6.82 5.47 5.16 4.74 4.21 3.41 2.07 2.87
700
4.98 3.95 3.72 3.36 2.94 2.35 1.37 2.88
700
7.14 5.80 5.46 5.04 4.45 3.54 2.05 2.88
700
218

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,518
61
23
1,294
37
27
4,037
91
15
2,801
125
21
1,187
32
19
1,360
45
27
1,750
29
26
1,078
80
27
1,303
49
29
1,454
66
23
3,576
150
19
1,341
46
29
1,249
28
20
1,484
57
23
2,251
127
33
2,508
125
27
3,329
116
15
1,290
36
28
1,367
57
27
1,531
48
33
1,493
54
33
1,065
51
19
1,372
61
28
1,219
30
20

Table A.1 (Cont'd)

File Title
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-I94-CS82021-11-19-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.21 3.47 3.25 3.05 2.76 2.26 1.40 2.91
700
5.70 4.57 4.33 3.93 3.48 2.76 1.60 2.91
700
5.19 4.20 3.90 3.53 3.14 2.53 1.46 2.91
700
6.76 5.44 5.11 4.69 4.19 3.40 2.05 2.94
700
5.03 3.97 3.77 3.40 2.94 2.35 1.36 2.95
700
4.97 4.35 3.59 3.29 2.88 2.33 1.40 3.00
700
5.04 4.48 4.23 4.03 3.65 3.07 2.03 0.93
175
4.46 3.89 3.63 3.38 2.98 2.32 1.30 0.94
175
4.47 3.87 3.61 3.33 2.96 2.34 1.31 0.95
175
5.00 4.45 4.18 4.00 3.64 3.05 2.05 0.97
175
5.22 4.63 4.40 4.15 3.78 3.12 1.96 0.98
175
5.17 4.60 4.33 4.09 3.74 3.08 1.93 0.98
175
4.56 4.02 3.82 3.58 3.23 2.62 1.56 1.01
175
4.99 4.35 4.08 3.80 3.33 2.63 1.47 1.01
175
4.45 3.84 3.58 3.32 2.91 2.26 1.23 1.05
175
4.47 3.90 3.67 3.44 3.07 2.45 1.44 1.05
175
5.02 4.44 4.20 4.02 3.66 3.05 2.06 1.06
175
4.25 3.66 3.45 3.20 2.84 2.25 1.29 1.07
175
4.47 3.88 3.68 3.43 3.08 2.45 1.44 1.09
175
5.20 4.63 4.38 4.16 3.75 3.10 1.90 1.10
175
4.54 4.00 3.76 3.56 3.19 2.61 1.59 1.11
175
4.15 3.57 3.37 3.14 2.80 2.22 1.31 1.12
175
5.00 4.39 4.10 3.86 3.37 2.67 1.51 1.14
175
5.19 4.62 4.41 4.19 3.77 3.11 1.89 1.15
175
219

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
2,036
79
27
1,375
43
25
1,402
56
27
1,089
51
19
1,352
59
29
1,074
79
27
1,678
67
10
1,680
23
20
1,629
28
19
1,659
74
9
1,814
35
11
1,782
35
11
2,011
22
16
1,546
20
18
1,621
22
21
1,791
30
16
1,653
75
9
1,741
34
19
1,807
30
17
1,921
21
12
1,876
37
14
1,746
43
17
1,595
19
17
2,041
13
14

Table A.1 (Cont'd)

File Title
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.21 3.66 3.44 3.22 2.86 2.24 1.26 1.16
175
4.96 4.32 4.04 3.79 3.34 2.63 1.47 1.16
175
4.44 3.87 3.63 3.42 3.04 2.43 1.43 1.16
175
4.30 3.69 3.48 3.23 2.90 2.28 1.33 1.16
175
4.34 3.74 3.53 3.28 2.96 2.36 1.39 1.16
175
5.13 4.53 4.27 4.07 3.68 3.03 1.91 1.17
175
4.72 4.16 3.93 3.70 3.36 2.74 1.64 1.18
175
4.73 4.08 3.91 3.62 3.27 2.60 1.54 1.19
175
4.36 3.77 3.55 3.32 2.93 2.30 1.30 1.19
175
5.24 4.58 4.33 4.07 3.75 3.09 1.96 1.20
175
4.26 3.67 3.46 3.24 2.86 2.31 1.37 1.20
175
4.73 4.15 3.89 3.64 3.27 2.63 1.49 1.21
175
4.31 3.74 3.51 3.29 2.88 2.27 1.26 1.22
175
4.56 4.00 3.82 3.60 3.23 2.66 1.61 1.22
175
4.30 3.73 3.51 3.32 2.98 2.47 1.55 1.24
175
4.73 4.12 3.91 3.68 3.28 2.64 1.55 1.24
175
3.81 3.25 3.02 2.83 2.49 1.99 1.17 1.27
175
4.34 3.75 3.51 3.30 2.94 2.33 1.35 1.29
175
4.70 4.06 3.89 3.63 3.20 2.57 1.50 1.29
175
4.22 3.61 3.42 3.17 2.84 2.23 1.27 1.29
175
4.78 4.15 3.95 3.69 3.33 2.64 1.51 1.30
175
4.36 3.76 3.54 3.35 2.98 2.45 1.52 1.31
175
4.32 3.72 3.51 3.31 2.99 2.46 1.54 1.31
175
5.16 4.53 4.29 4.09 3.72 3.07 1.94 1.32
175
220

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,935
19
21
1,581
18
18
1,784
32
17
1,699
38
18
1,757
39
17
1,719
41
11
1,970
24
14
1,715
30
15
1,764
24
20
1,581
52
10
1,697
46
16
1,888
15
18
1,811
19
21
2,046
28
14
1,738
69
13
1,818
24
16
1,709
61
19
1,771
32
18
1,696
27
16
1,805
30
19
1,876
15
18
1,656
64
14
1,700
69
13
1,747
41
11

Table A.1 (Cont'd)

File Title
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006
rigid-M-M5-CS00000-11-29-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.03 3.43 3.26 3.05 2.73 2.22 1.37 1.33
175
3.85 3.27 3.06 2.86 2.51 2.06 1.24 1.34
175
4.59 3.99 3.76 3.54 3.17 2.52 1.44 1.34
175
4.63 4.07 3.86 3.65 3.32 2.77 1.71 1.35
175
3.79 3.23 3.02 2.81 2.51 1.99 1.14 1.36
175
4.64 3.98 3.79 3.52 3.12 2.53 1.46 1.37
175
4.20 3.61 3.38 3.18 2.78 2.20 1.24 1.40
175
5.10 4.51 4.27 4.05 3.72 3.10 1.92 1.40
175
4.67 4.10 3.89 3.70 3.33 2.76 1.68 1.41
175
4.34 3.75 3.52 3.32 2.96 2.34 1.34 1.42
175
4.38 3.78 3.54 3.32 2.96 2.33 1.29 1.42
175
3.84 3.27 3.08 2.89 2.59 2.07 1.23 1.47
175
4.03 3.40 3.25 3.03 2.71 2.19 1.33 1.52
175
4.65 4.08 3.87 3.69 3.36 2.78 1.71 1.52
175
4.79 4.17 3.95 3.76 3.37 2.76 1.64 1.57
175
4.26 3.68 3.44 3.26 2.93 2.33 1.35 1.58
175
4.87 4.20 3.97 3.74 3.41 2.75 1.64 1.60
175
4.62 3.95 3.77 3.54 3.12 2.50 1.42 1.61
175
3.76 3.18 3.04 2.82 2.53 2.05 1.20 1.64
175
3.81 3.25 3.04 2.85 2.59 2.08 1.22 1.70
175
5.15 4.49 4.27 4.11 3.70 3.10 1.94 1.72
175
4.80 4.05 3.90 3.62 3.25 2.61 1.52 1.73
175
4.04 3.38 3.17 3.01 2.71 2.17 1.38 1.74
175
4.24 3.62 3.38 3.16 2.86 2.26 1.26 1.77
175
221

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,721
71
15
1,621
78
17
1,894
18
18
2,036
36
13
1,851
46
21
1,687
31
16
1,767
29
20
1,981
28
12
2,043
29
14
1,868
24
19
1,855
18
21
1,852
57
18
1,701
68
16
2,123
28
13
1,930
23
15
1,918
28
18
1,753
31
14
1,768
22
18
1,976
51
19
1,969
51
19
1,842
37
11
1,629
33
15
1,498
95
15
1,844
26
20

Table A.1 (Cont'd)

File Title
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-08-30-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.63 4.96 4.61 4.09 3.62 2.87 1.65 1.21
700
5.67 5.00 4.65 4.09 3.62 2.87 1.65 1.21
700
8.50 7.09 6.38 5.59 4.84 3.54 1.81 1.95
700
7.95 6.73 6.10 5.43 4.80 3.74 2.09 2.04
700
8.62 7.13 6.46 5.59 4.92 3.54 1.81 2.08
700
7.87 6.65 6.06 5.35 4.76 3.70 2.05 2.13
700
7.36 5.83 5.31 4.69 4.13 3.19 1.85 2.22
700
7.36 5.79 5.31 4.69 4.09 3.23 1.89 2.23
700
8.58 7.24 6.57 5.79 5.04 3.86 2.01 2.24
700
8.50 7.20 6.54 5.71 5.00 3.82 1.97 2.24
700
6.81 5.67 5.12 4.53 4.02 3.19 1.81 2.31
700
6.85 5.67 5.12 4.53 4.02 3.19 1.81 2.38
700
6.81 5.59 5.08 4.53 4.02 3.19 1.81 2.58
700
8.54 7.13 6.46 5.71 5.00 3.82 2.13 1.81
700
7.36 6.10 5.51 4.80 4.13 3.11 1.65 1.91
700
7.95 6.81 6.30 5.63 5.00 3.94 2.20 1.97
700
8.15 6.97 6.46 5.75 5.04 4.02 2.24 2.00
700
7.56 6.22 5.67 4.92 4.29 3.23 1.73 2.06
700
7.01 5.87 5.31 4.69 4.06 3.07 1.61 2.10
700
6.97 5.83 5.31 4.65 4.06 3.07 1.61 2.12
700
7.56 6.26 5.67 4.92 4.25 3.19 1.65 2.15
700
7.56 6.22 5.63 4.92 4.29 3.23 1.73 2.16
700
8.15 6.73 6.14 5.43 4.76 3.66 2.01 2.24
700
7.72 6.38 5.79 5.04 4.37 3.31 1.73 2.28
700
222

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,970
36
24
1,941
37
25
998
18
22
1,117
34
19
989
18
22
1,105
33
19
722
78
21
727
83
20
1,070
19
19
1,098
17
20
1,026
64
21
989
66
21
1,059
63
21
931
35
18
1,078
32
24
1,389
24
18
1,271
27
18
1,054
33
23
1,283
26
25
1,311
26
25
1,080
26
24
1,042
34
23
992
36
20
1,351
28
23

Table A.1 (Cont'd)

File Title
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS65041-09-14-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
8.15 6.73 6.14 5.39 4.76 3.66 2.01 2.28
700
7.91 6.73 6.26 5.55 4.92 3.90 2.13 2.29
700
7.32 6.06 5.47 4.76 4.09 3.11 1.61 2.31
700
10.24 8.43 7.72 6.77 5.91 4.37 2.24 2.33
700
9.88 8.15 7.44 6.54 5.67 4.25 2.17 2.41
700
9.92 8.19 7.44 6.54 5.71 4.25 2.17 2.45
700
7.09 5.91 5.39 4.72 4.09 3.15 1.61 2.60
700
6.26 5.51 5.24 4.69 4.25 3.46 2.20 0.92
700
6.02 5.20 4.76 4.17 3.66 2.83 1.61 1.12
700
6.22 5.51 5.16 4.69 4.21 3.50 2.20 1.21
700
6.34 5.35 4.92 4.25 3.74 2.91 1.69 1.22
700
6.06 5.24 4.80 4.21 3.70 2.83 1.57 1.23
700
6.34 5.31 4.92 4.25 3.74 2.91 1.69 1.33
700
8.90 7.52 6.93 6.10 5.35 4.17 2.40 1.41
700
9.09 7.76 7.13 6.26 5.51 4.29 2.44 1.43
700
6.69 5.59 5.16 4.49 3.94 3.07 1.77 1.46
700
4.37 3.86 3.62 3.23 2.91 2.40 1.46 1.47
700
8.62 7.32 6.69 5.91 5.20 3.98 2.24 1.47
700
4.53 3.98 3.70 3.31 2.99 2.40 1.42 1.49
700
6.97 5.94 5.43 4.76 4.17 3.23 1.81 1.50
700
7.95 6.77 6.18 5.39 4.69 3.54 1.89 1.51
700
8.90 7.52 6.89 6.10 5.39 4.17 2.40 1.51
700
5.75 4.92 4.49 3.98 3.46 2.72 1.54 1.54
700
7.99 6.85 6.30 5.59 4.88 3.74 2.01 1.63
700
223

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
984
37
20
1,378
23
19
1,120
29
25
897
15
18
955
15
19
945
15
19
1,258
25
24
1,709
73
18
1,461
44
24
1,749
74
18
1,118
64
23
1,526
34
25
1,129
64
23
917
39
16
939
33
16
1,071
58
22
2,570
82
27
1,009
31
18
2,463
61
28
1,218
38
21
1,160
21
21
919
38
16
1,498
51
25
1,327
18
20

Table A.1 (Cont'd)

File Title
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
9.69 8.39 7.76 6.93 6.22 4.88 2.80 1.63
700
9.21 7.99 7.36 6.57 5.91 4.65 2.68 1.65
700
7.52 6.06 5.63 4.96 4.41 3.54 2.17 1.65
700
6.81 5.83 5.31 4.69 4.09 3.19 1.77 1.66
700
7.52 6.54 5.94 5.24 4.61 3.54 1.89 1.68
700
7.80 6.50 5.91 5.20 4.53 3.46 1.93 1.68
700
6.30 5.43 4.92 4.37 3.82 2.95 1.61 1.69
700
9.13 7.72 7.09 6.22 5.55 4.25 2.40 1.69
700
8.74 7.40 6.77 5.98 5.31 4.06 2.28 1.70
700
7.72 6.54 5.98 5.20 4.57 3.46 1.85 1.76
700
9.21 7.95 7.36 6.54 5.91 4.65 2.68 1.76
700
5.79 4.96 4.53 4.02 3.50 2.76 1.54 1.76
700
5.79 4.92 4.57 4.02 3.50 2.76 1.54 1.77
700
9.09 7.80 7.20 6.50 5.79 4.57 2.64 1.79
700
7.52 6.02 5.55 4.92 4.37 3.50 2.13 1.81
700
7.13 6.06 5.59 4.88 4.29 3.35 1.85 1.82
700
7.72 6.57 5.98 5.16 4.53 3.46 1.85 1.82
700
5.98 5.00 4.61 4.02 3.50 2.68 1.46 1.82
700
7.01 5.91 5.47 4.76 4.21 3.23 1.77 1.84
700
9.57 8.15 7.48 6.77 5.98 4.72 2.72 1.88
700
9.29 7.83 7.20 6.38 5.63 4.33 2.40 1.88
700
4.41 3.86 3.62 3.23 2.91 2.40 1.42 1.90
700
7.76 6.30 5.75 5.08 4.53 3.66 2.20 1.90
700
9.65 8.15 7.48 6.61 5.87 4.49 2.48 1.91
700
224

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,078
25
14
1,154
27
15
685
101
17
1,301
36
22
1,382
18
21
957
39
20
1,501
31
25
924
32
16
1,010
31
17
1,185
24
22
1,143
27
15
1,529
45
25
1,587
44
26
1,112
30
15
667
100
18
1,277
34
21
1,139
26
21
1,336
43
26
1,273
32
22
961
31
14
990
25
16
2,561
70
28
678
91
17
945
24
16

Table A.1 (Cont'd)

File Title
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-09-17-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
8.15 7.01 6.42 5.67 4.92 3.82 2.01 1.91
700
7.48 6.22 5.67 4.96 4.33 3.31 1.81 1.92
700
9.33 7.91 7.24 6.38 5.63 4.37 2.40 1.97
700
6.85 5.87 5.31 4.72 4.13 3.23 1.77 1.97
700
7.17 6.02 5.59 4.88 4.33 3.35 1.85 2.01
700
9.09 7.80 7.20 6.46 5.79 4.61 2.64 2.03
700
7.52 6.22 5.67 4.96 4.37 3.31 1.81 2.07
700
10.83 8.98 8.23 7.24 6.42 5.04 2.87 2.08
700
6.73 5.47 5.08 4.49 4.02 3.19 1.89 2.17
700
11.26 9.29 8.50 7.52 6.65 5.20 2.95 2.18
700
5.79 4.84 4.45 3.86 3.39 2.60 1.38 2.21
700
10.98 9.02 8.31 7.32 6.54 5.12 2.91 2.36
700
7.91 6.14 5.59 4.80 4.13 3.15 1.73 2.43
700
6.89 5.91 5.47 5.04 4.57 3.82 2.32 2.46
700
8.15 6.34 5.75 4.96 4.29 3.23 1.77 2.47
700
6.93 5.91 5.51 5.04 4.61 3.82 2.32 2.48
700
6.65 5.43 5.00 4.45 3.94 3.19 1.85 2.49
700
7.24 6.22 5.79 5.31 4.84 4.02 2.40 2.58
700
5.79 4.76 4.41 3.82 3.35 2.60 1.38 2.61
700
6.93 5.67 5.20 4.61 4.09 3.31 1.89 2.67
700
7.95 6.10 5.55 4.80 4.13 3.15 1.73 2.68
700
8.11 6.93 6.38 5.63 4.96 3.86 2.40 0.33
700
6.97 6.06 5.67 5.08 4.53 3.62 2.28 0.65
700
4.33 3.82 3.54 3.19 2.83 2.28 1.42 0.69
700
225

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,255
17
20
1,041
37
21
983
25
16
1,331
34
22
1,288
34
21
1,138
29
15
1,026
37
21
656
36
13
953
87
20
633
34
13
1,504
37
28
660
37
13
639
60
22
1,465
73
16
614
56
21
1,534
67
17
985
85
21
1,606
50
16
1,479
39
28
939
77
20
625
61
22
885
66
17
1,282
71
17
2,212
101
28

Table A.1 (Cont'd)

File Title
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.35 4.65 4.33 3.82 3.43 2.72 1.69 0.69
700
7.20 6.22 5.83 5.24 4.65 3.66 2.32 0.69
700
7.32 6.30 5.83 5.20 4.65 3.70 2.32 0.72
700
7.52 6.46 6.02 5.28 4.72 3.66 2.24 0.78
700
8.31 7.01 6.50 5.75 5.04 3.90 2.40 0.83
700
4.33 3.82 3.58 3.15 2.87 2.28 1.42 0.86
700
8.07 6.81 6.34 5.55 4.88 3.86 2.36 0.88
700
5.83 5.04 4.69 4.21 3.70 2.87 1.69 1.00
700
5.98 5.16 4.76 4.29 3.78 2.91 1.73 1.00
700
5.83 5.04 4.69 4.17 3.74 3.07 1.93 1.05
700
5.08 4.45 4.13 3.70 3.31 2.60 1.54 1.07
700
5.83 5.04 4.69 4.21 3.74 2.87 1.69 1.08
700
4.37 3.86 3.54 3.19 2.87 2.28 1.38 1.10
700
5.35 4.61 4.29 3.82 3.39 2.72 1.65 1.14
700
4.96 4.33 4.02 3.58 3.19 2.56 1.54 1.14
700
7.17 6.02 5.51 4.88 4.33 3.35 2.01 1.16
700
7.05 6.14 5.71 5.16 4.65 3.78 2.36 1.18
700
6.97 6.10 5.67 5.16 4.61 3.78 2.36 1.19
700
7.40 6.22 5.71 5.00 4.41 3.46 2.05 1.20
700
7.20 6.06 5.59 4.92 4.37 3.39 2.01 1.25
700
5.39 4.61 4.29 3.82 3.43 2.72 1.65 1.29
700
7.36 6.22 5.79 5.16 4.61 3.70 2.28 1.30
700
9.61 8.07 7.48 6.54 5.67 4.25 2.32 1.39
700
9.41 7.91 7.32 6.38 5.55 4.17 2.28 1.40
700
226

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,591
91
24
1,187
68
17
1,064
77
17
1,063
58
17
854
60
17
2,241
96
28
870
67
17
1,701
45
23
1,531
50
22
1,363
102
20
2,059
53
26
1,747
43
24
2,287
78
28
1,628
84
24
1,963
73
26
985
67
20
1,336
72
17
1,389
71
17
928
64
19
1,038
61
20
1,575
83
23
1,033
77
17
936
21
17
951
23
18

Table A.1 (Cont'd)

File Title
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16091-10-26-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
9.33 7.87 7.24 6.34 5.51 4.13 2.24 1.41
700
6.18 5.08 4.61 4.02 3.50 2.60 1.46 1.46
700
7.09 6.22 5.75 5.20 4.69 3.82 2.32 1.51
700
7.13 6.22 5.75 5.24 4.69 3.82 2.32 1.55
700
7.28 6.34 5.87 5.35 4.76 3.86 2.32 1.56
700
5.55 4.76 4.41 3.94 3.50 2.80 1.65 1.58
700
6.18 5.31 4.92 4.37 3.90 3.07 1.77 1.60
700
6.18 5.08 4.65 4.02 3.46 2.64 1.46 1.64
700
5.55 4.76 4.41 3.90 3.50 2.80 1.65 1.66
700
11.26 9.49 8.86 7.76 6.77 5.16 2.80 1.67
700
11.50 9.76 9.13 7.99 6.93 5.31 2.83 1.68
700
5.59 4.76 4.41 3.94 3.50 2.80 1.65 1.69
700
11.30 9.53 8.90 7.80 6.81 5.20 2.80 1.75
700
6.42 5.55 5.12 4.57 4.06 3.27 1.89 1.81
700
6.30 5.16 4.72 4.09 3.54 2.68 1.46 1.88
700
5.87 4.69 4.29 3.82 3.39 2.72 1.65 1.88
700
10.51 8.82 8.19 7.20 6.26 4.76 2.52 1.92
700
5.83 4.65 4.25 3.78 3.35 2.72 1.65 1.93
700
10.12 8.54 7.83 6.93 6.02 4.57 2.40 1.94
700
5.79 4.65 4.21 3.78 3.35 2.72 1.65 1.97
700
10.12 8.50 7.80 6.89 5.98 4.57 2.36 2.23
700
6.18 5.31 4.92 4.37 3.90 3.15 1.77 2.28
700
4.13 3.58 3.35 2.99 2.64 2.09 1.34 0.76
700
6.38 5.51 5.08 4.53 4.02 3.15 1.89 0.95
700
227

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
979
21
18
1,108
53
27
1,481
56
17
1,462
56
17
1,396
52
17
1,661
67
24
1,609
44
22
1,102
53
26
1,620
70
24
881
16
15
884
13
14
1,613
66
24
895
15
15
1,488
50
21
1,113
46
26
823
133
23
930
15
16
801
145
23
1,009
14
17
823
144
23
1,010
14
18
1,676
42
22
2,068
129
29
1,378
59
21

Table A.1 (Cont'd)

File Title
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.20 5.87 5.31 4.57 3.94 2.91 1.65 1.06
700
6.26 5.24 4.80 4.21 3.70 2.83 1.65 1.17
700
7.01 5.71 5.20 4.45 3.82 2.87 1.61 1.25
700
8.94 7.68 7.01 6.22 5.47 4.21 2.40 1.25
700
6.97 5.63 5.20 4.41 3.82 2.83 1.61 1.27
700
6.38 5.51 5.08 4.53 4.02 3.19 1.89 1.27
700
9.25 7.87 7.20 6.42 5.63 4.33 2.48 1.37
700
8.94 7.60 7.01 6.22 5.43 4.21 2.40 1.38
700
7.05 5.98 5.51 4.84 4.21 3.27 1.85 1.39
700
7.83 6.69 6.10 5.43 4.72 3.58 1.97 1.39
700
6.38 5.47 5.04 4.49 3.98 3.15 1.85 1.43
700
7.91 6.73 6.22 5.51 4.80 3.66 2.01 1.47
700
7.09 6.02 5.55 4.88 4.25 3.27 1.81 1.50
700
7.17 6.14 5.59 4.96 4.29 3.31 1.81 1.57
700
7.44 6.42 5.94 5.28 4.61 3.62 2.01 1.59
700
7.95 6.73 6.18 5.51 4.76 3.62 1.97 1.61
700
6.54 5.59 5.16 4.61 4.06 3.15 1.77 1.63
700
6.89 5.83 5.35 4.69 4.06 3.15 1.73 1.69
700
7.48 6.42 5.94 5.31 4.65 3.66 2.05 1.71
700
6.18 5.16 4.72 4.13 3.62 2.83 1.61 1.71
700
6.50 5.59 5.16 4.61 4.06 3.15 1.73 1.72
700
5.55 4.72 4.41 3.90 3.43 2.68 1.50 1.72
700
7.76 6.61 6.06 5.39 4.69 3.62 1.97 1.76
700
6.10 5.12 4.69 4.09 3.58 2.83 1.61 1.76
700
228

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
843
52
24
1,131
61
23
881
55
25
998
30
16
881
57
25
1,424
55
21
958
30
16
989
32
16
1,228
41
22
1,228
25
21
1,392
57
21
1,228
24
20
1,268
34
22
1,296
28
22
1,420
26
20
1,203
23
20
1,594
32
23
1,291
36
23
1,418
28
20
1,159
62
24
1,689
26
24
1,820
40
27
1,284
24
21
1,183
64
24

Table A.1 (Cont'd)

File Title
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
9.53 7.99 7.32 6.46 5.67 4.37 2.44 1.80
700
7.99 6.65 6.06 5.43 4.69 3.70 2.13 1.82
700
7.83 6.46 5.94 5.28 4.61 3.62 2.09 1.88
700
8.43 7.13 6.61 5.91 5.20 4.09 2.32 1.89
700
7.83 6.65 6.10 5.43 4.72 3.62 1.93 1.89
700
8.35 7.13 6.54 5.87 5.20 4.09 2.32 1.90
700
7.09 5.98 5.51 4.84 4.17 3.23 1.73 1.92
700
9.53 8.03 7.32 6.50 5.67 4.41 2.44 1.93
700
5.67 4.76 4.37 3.82 3.35 2.56 1.38 1.95
700
5.55 4.72 4.41 3.90 3.43 2.68 1.46 1.97
700
8.74 7.40 6.85 6.10 5.39 4.25 2.40 1.97
700
6.69 5.71 5.28 4.72 4.09 3.23 1.77 2.00
700
6.93 5.83 5.35 4.72 4.06 3.15 1.69 2.00
700
8.43 7.05 6.38 5.63 4.88 3.70 1.97 2.02
700
7.68 6.46 5.91 5.16 4.49 3.46 1.85 2.03
700
7.80 6.61 6.10 5.39 4.69 3.66 1.97 2.04
700
7.64 6.38 5.87 5.08 4.41 3.43 1.85 2.09
700
9.84 8.23 7.56 6.65 5.83 4.53 2.48 2.12
700
8.43 7.09 6.42 5.63 4.88 3.74 1.97 2.13
700
8.66 7.17 6.54 5.71 4.96 3.74 1.97 2.13
700
10.51 8.78 7.99 7.05 6.10 4.61 2.40 2.13
700
8.62 7.20 6.57 5.79 5.00 3.82 2.01 2.14
700
10.47 8.78 7.99 7.01 6.10 4.65 2.44 2.15
700
7.80 6.46 5.91 5.28 4.65 3.62 2.05 2.17
700
229

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
879
29
16
907
51
18
930
54
19
1,145
32
17
1,303
20
21
1,181
32
17
1,295
28
23
894
28
16
1,576
37
29
1,943
31
28
1,103
29
16
1,444
33
22
1,320
31
24
1,026
25
20
1,085
30
21
1,290
24
21
1,075
33
21
886
25
16
1,049
23
20
987
22
20
862
16
16
1,029
22
20
872
17
16
995
47
19

Table A.1 (Cont'd)

File Title
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001
rigid-N-I75-CS16092-09-18-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
8.27 7.05 6.38 5.67 5.00 3.90 2.13 2.17
700
7.17 5.94 5.39 4.76 4.13 3.15 1.69 2.19
700
8.11 6.85 6.26 5.55 4.88 3.82 2.09 2.20
700
8.54 6.97 6.38 5.55 4.84 3.66 1.97 2.21
700
8.50 6.85 6.18 5.43 4.65 3.50 1.89 2.22
700
8.62 7.09 6.42 5.59 4.84 3.66 1.93 2.24
700
8.46 6.81 6.18 5.43 4.65 3.50 1.89 2.24
700
7.64 6.42 5.87 5.08 4.45 3.46 1.85 2.24
700
8.82 7.24 6.57 5.71 4.96 3.74 1.97 2.27
700
8.11 6.93 6.26 5.55 4.88 3.82 2.05 2.31
700
5.79 4.84 4.41 3.86 3.35 2.60 1.38 2.32
700
8.39 6.93 6.30 5.51 4.80 3.62 1.89 2.33
700
7.13 5.91 5.43 4.72 4.09 3.15 1.65 2.37
700
6.54 5.24 4.65 3.94 3.35 2.40 1.18 2.38
700
10.83 9.09 8.23 7.24 6.30 4.84 2.52 2.39
700
9.49 7.64 7.01 6.14 5.35 4.09 2.24 2.43
700
8.35 6.93 6.30 5.51 4.80 3.62 1.85 2.44
700
5.67 4.76 4.33 3.78 3.27 2.56 1.34 2.50
700
9.21 7.44 6.77 5.94 5.20 3.98 2.17 2.53
700
9.21 7.44 6.77 5.94 5.20 4.02 2.20 2.58
700
8.74 6.97 6.38 5.63 4.84 3.66 1.97 2.61
700
7.40 6.10 5.59 4.88 4.25 3.31 1.73 2.79
700
9.92 7.80 7.09 6.18 5.43 4.13 2.24 2.93
700
9.92 7.80 7.05 6.18 5.39 4.09 2.20 2.98
700
230

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,048
31
18
1,161
34
23
1,130
30
19
883
30
19
785
37
20
885
27
20
803
35
20
1,104
31
21
859
26
19
1,171
25
19
1,435
40
28
1,021
23
21
1,210
30
24
1,001
30
32
820
17
15
745
35
17
1,079
20
22
1,528
37
29
765
38
18
763
40
18
815
33
19
1,103
33
22
623
41
17
620
39
17

Table A.1 (Cont'd)

File Title
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.98 5.16 4.72 4.25 3.74 2.87 1.69 1.05
700
6.81 5.75 5.31 4.69 4.09 3.19 1.89 1.05
700
5.87 5.12 4.65 4.17 3.70 2.91 1.73 1.13
700
6.65 5.59 5.16 4.57 4.06 3.15 1.89 1.22
700
8.23 7.09 6.61 5.94 5.28 4.09 2.40 1.26
700
6.81 5.94 5.51 4.92 4.37 3.54 2.13 1.28
700
5.47 4.72 4.33 3.90 3.43 2.72 1.61 1.30
700
7.36 6.30 5.83 5.20 4.65 3.62 2.13 1.40
700
6.85 5.79 5.31 4.65 4.06 3.07 1.69 1.42
700
6.69 5.63 5.16 4.57 4.06 3.19 1.89 1.46
700
7.24 6.02 5.55 4.84 4.17 3.11 1.69 1.47
700
7.60 6.50 6.02 5.35 4.72 3.70 2.13 1.48
700
6.77 5.71 5.20 4.57 4.02 3.07 1.73 1.51
700
7.36 6.30 5.79 5.08 4.45 3.43 1.89 1.51
700
9.13 7.68 7.01 6.18 5.39 4.17 2.36 1.54
700
6.81 5.91 5.51 4.92 4.41 3.54 2.09 1.55
700
9.53 7.99 7.36 6.38 5.63 4.29 2.40 1.57
700
7.52 6.34 5.83 5.16 4.49 3.39 1.85 1.58
700
7.36 6.34 5.79 5.12 4.49 3.46 1.89 1.59
700
7.40 6.30 5.83 5.12 4.49 3.43 1.85 1.65
700
8.15 6.89 6.30 5.51 4.80 3.62 1.93 1.66
700
7.36 6.34 5.87 5.20 4.65 3.66 2.09 1.66
700
10.00 8.50 7.83 6.93 6.10 4.69 2.60 1.67
700
9.49 7.95 7.28 6.34 5.59 4.25 2.36 1.67
700
231

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,538
48
23
1,098
60
21
1,528
61
23
1,123
69
21
1,272
29
16
1,431
57
19
1,638
66
24
1,300
43
19
1,268
31
23
1,112
69
21
1,167
30
24
1,291
35
19
1,184
43
22
1,279
28
21
862
35
16
1,605
43
19
858
30
16
1,244
26
22
1,340
25
21
1,373
22
22
1,141
22
21
1,376
36
19
919
23
15
850
30
17

Table A.1 (Cont'd)

File Title
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.47 4.72 4.33 3.90 3.43 2.76 1.61 1.68
700
8.23 7.01 6.50 5.75 5.08 3.94 2.20 1.69
700
9.69 8.11 7.52 6.54 5.71 4.37 2.40 1.71
700
9.49 7.99 7.32 6.46 5.63 4.37 2.44 1.72
700
9.69 8.19 7.52 6.61 5.91 4.45 2.48 1.73
700
8.50 7.20 6.61 5.83 5.08 3.82 2.01 1.74
700
6.97 5.79 5.28 4.61 4.02 2.99 1.61 1.75
700
6.77 5.71 5.20 4.57 3.98 3.07 1.69 1.75
700
7.52 6.42 5.94 5.20 4.57 3.54 1.93 1.75
700
8.07 7.01 6.50 5.79 5.16 4.13 2.36 1.76
700
6.97 5.91 5.43 4.76 4.17 3.23 1.77 1.80
700
7.24 6.02 5.51 4.80 4.17 3.11 1.65 1.80
700
8.15 6.89 6.34 5.51 4.84 3.66 1.93 1.85
700
5.71 4.88 4.45 3.98 3.50 2.80 1.61 1.86
700
8.11 7.01 6.46 5.83 5.16 4.13 2.36 1.88
700
6.93 5.87 5.39 4.76 4.13 3.23 1.77 1.89
700
9.69 8.15 7.52 6.65 5.87 4.53 2.52 1.90
700
7.32 6.18 5.67 5.00 4.41 3.35 1.81 1.90
700
9.13 7.68 7.05 6.22 5.43 4.25 2.36 1.93
700
8.03 6.85 6.34 5.59 4.96 3.90 2.17 1.95
700
7.24 6.14 5.71 5.00 4.41 3.39 1.81 1.95
700
7.24 6.14 5.71 5.00 4.41 3.39 1.81 1.95
700
10.20 8.43 7.72 6.69 5.79 4.25 2.17 1.96
700
7.32 6.18 5.63 5.00 4.37 3.35 1.81 1.99
700
232

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,693
63
24
1,229
25
18
887
25
16
891
29
16
947
24
16
1,145
18
20
1,188
32
25
1,230
38
23
1,241
27
20
1,344
29
17
1,327
33
23
1,183
28
24
1,194
20
21
1,509
60
24
1,329
29
17
1,348
33
23
952
25
16
1,325
25
22
939
31
17
1,260
28
18
1,481
20
23
1,475
21
23
861
15
18
1,302
27
22

Table A.1 (Cont'd)

File Title
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-N-I75-CS160992-09-27-2001
rigid-So-I196-CS3033-05-14-2008
rigid-So-I196-CS3033-05-14-2008
rigid-So-I196-CS3033-05-14-2008
rigid-So-I196-CS3033-05-14-2008
rigid-So-I69-CS12034-10-08-1998
rigid-So-I69-CS12034-10-08-1998
rigid-So-I69-CS12034-10-08-1998
rigid-So-I69-CS12034-10-09-1998
rigid-So-I69-CS12034-10-09-1998
rigid-So-I69-CS12034-10-09-1998

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
9.65 7.91 7.28 6.26 5.39 3.98 2.05 1.99
700
7.52 6.38 5.83 5.12 4.49 3.43 1.81 2.00
700
6.97 5.79 5.31 4.61 3.98 2.99 1.54 2.06
700
7.01 5.79 5.31 4.61 4.02 3.03 1.61 2.07
700
7.32 6.18 5.67 5.00 4.37 3.35 1.77 2.08
700
7.09 5.98 5.51 4.88 4.25 3.27 1.73 2.09
700
7.20 5.94 5.43 4.72 4.09 3.07 1.61 2.10
700
7.56 6.30 5.75 5.08 4.41 3.31 1.73 2.10
700
7.13 6.02 5.51 4.84 4.25 3.27 1.73 2.18
700
9.72 7.99 7.32 6.34 5.47 4.06 2.05 2.25
700
8.03 6.81 6.30 5.55 4.92 3.90 2.13 2.35
700
7.13 6.02 5.55 4.88 4.25 3.35 1.77 2.45
700
5.83 4.84 4.33 3.78 3.31 2.52 1.30 2.70
700
7.32 6.18 5.63 5.00 4.37 3.46 1.81 2.78
700
9.25 8.15 7.52 6.77 6.02 4.76 2.72 1.32
700
5.08 4.41 4.09 3.62 3.19 2.56 1.50 1.33
700
9.25 8.23 7.56 6.81 6.02 4.80 2.72 1.36
700
9.29 8.19 7.60 6.77 6.06 4.80 2.72 1.40
700
13.03 10.67 9.84 8.54 7.28 5.43 2.95 1.65
700
9.09 7.48 6.97 5.94 5.12 3.82 2.05 1.69
700
10.71 8.82 8.15 7.09 6.06 4.49 2.32 1.89
700
3.07 2.60 2.44 2.17 1.89 1.46 0.94 0.99
700
9.69 8.15 7.60 6.77 5.94 4.69 2.87 1.32
700
3.58 2.95 2.72 2.36 1.97 1.46 0.79 1.37
700
233

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
864
18
19
1,321
20
22
1,284
23
26
1,205
31
25
1,376
22
23
1,437
21
23
1,141
29
24
1,255
21
24
1,397
22
23
914
16
20
1,283
26
19
1,334
27
22
1,453
33
30
1,433
22
22
1,247
21
13
1,881
56
23
1,273
19
13
1,268
20
13
936
27
21
1,409
37
31
1,320
24
28
1,224
61
20
1,355
58
22
1,000
29
24

Table A.1 (Cont'd)

File Title
rigid-So-I69-CS12034-10-09-1998
rigid-So-I69-CS12034-10-09-1998
rigid-So-I69-CS12034-10-09-1998
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
11.73 9.61 8.90 7.64 6.50 4.80 2.60 1.46
700
7.76 6.38 5.79 5.08 4.33 3.15 1.69 1.57
700
11.77 9.61 8.86 7.68 6.61 4.96 2.68 1.92
700
5.71 5.12 4.88 4.33 3.90 3.07 1.97 0.61
700
6.26 5.71 5.39 4.84 4.29 3.50 2.20 0.69
700
6.34 5.79 5.43 4.92 4.37 3.58 2.24 0.69
700
5.71 5.16 4.84 4.37 3.86 3.15 1.97 0.72
700
5.51 5.00 4.65 4.21 3.74 3.03 1.89 0.75
700
6.26 5.75 5.39 4.84 4.33 3.54 2.20 0.76
700
5.87 5.12 4.80 4.29 3.82 3.07 1.93 0.84
700
5.87 5.12 4.76 4.25 3.78 3.03 1.89 0.85
700
5.94 5.28 4.92 4.53 4.06 3.31 2.13 0.91
700
6.14 5.39 5.08 4.61 4.13 3.39 2.20 0.92
700
6.61 5.83 5.47 4.96 4.45 3.66 2.36 0.93
700
5.39 4.69 4.45 4.02 3.54 2.87 1.85 0.94
700
6.34 5.63 5.31 4.84 4.29 3.58 2.32 1.01
700
6.42 5.63 5.31 4.76 4.25 3.50 2.24 1.01
700
5.94 5.24 4.96 4.53 4.06 3.35 2.17 1.01
700
6.65 5.71 5.35 4.76 4.21 3.39 2.13 1.02
700
6.85 5.87 5.55 4.88 4.29 3.35 2.01 1.05
700
5.87 5.08 4.76 4.29 3.82 3.07 1.93 1.06
700
6.34 5.59 5.24 4.80 4.29 3.54 2.28 1.07
700
5.43 4.76 4.49 4.09 3.66 3.03 1.97 1.07
700
5.91 5.08 4.80 4.29 3.82 3.03 1.89 1.09
700
234

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,016
30
24
981
26
23
1,055
30
23
2,067
46
20
2,075
36
18
2,171
34
18
2,173
42
20
2,238
44
21
2,225
32
19
1,716
57
20
1,623
56
21
2,033
50
18
1,771
61
18
1,676
55
16
1,881
66
21
1,791
55
16
1,620
57
17
2,042
56
18
1,313
55
18
1,407
38
20
1,715
58
20
1,813
54
17
2,041
69
20
1,673
52
21

Table A.1 (Cont'd)

File Title
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.51 4.84 4.61 4.13 3.74 3.07 1.97 1.11
700
5.51 4.76 4.49 4.06 3.58 2.91 1.85 1.12
700
6.61 5.79 5.43 4.96 4.45 3.66 2.36 1.13
700
5.79 4.96 4.65 4.17 3.70 2.99 1.89 1.15
700
5.98 5.28 4.92 4.53 4.02 3.35 2.17 1.16
700
5.47 4.72 4.41 3.98 3.54 2.87 1.81 1.18
700
6.10 5.31 4.88 4.41 3.90 3.11 1.89 1.18
700
6.61 5.83 5.51 4.96 4.45 3.70 2.36 1.19
700
6.34 5.43 5.08 4.49 3.94 3.11 1.85 1.20
700
6.38 5.51 5.12 4.53 3.98 3.15 1.85 1.24
700
5.87 5.04 4.72 4.21 3.78 3.03 1.89 1.26
700
6.18 5.35 5.00 4.45 3.94 3.15 1.89 1.26
700
5.55 4.80 4.53 4.06 3.62 2.95 1.85 1.26
700
6.14 5.31 4.96 4.53 4.06 3.31 2.13 1.26
700
6.85 5.91 5.47 4.84 4.25 3.31 1.89 1.27
700
6.02 5.16 4.80 4.29 3.82 3.03 1.85 1.27
700
6.02 5.28 4.88 4.37 3.90 3.11 1.85 1.27
700
6.22 5.43 5.08 4.61 4.09 3.35 2.09 1.28
700
5.91 5.12 4.76 4.29 3.78 3.07 1.89 1.28
700
6.26 5.43 5.08 4.61 4.09 3.39 2.17 1.28
700
6.50 5.71 5.39 4.92 4.41 3.70 2.40 1.30
700
5.94 5.12 4.76 4.25 3.74 3.03 1.85 1.32
700
5.39 4.72 4.49 4.09 3.66 3.03 1.93 1.32
700
5.31 4.57 4.33 3.86 3.50 2.87 1.85 1.33
700
235

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
2,070
60
19
1,799
63
21
1,686
55
16
1,571
65
20
1,861
63
18
1,767
66
21
1,602
47
21
1,700
52
16
1,453
43
21
1,532
39
21
1,640
59
21
1,645
43
21
1,852
60
21
1,649
63
18
1,463
31
21
1,614
50
21
1,831
40
22
1,711
51
18
1,666
55
21
1,576
63
18
1,759
59
16
1,577
55
21
2,280
58
20
1,822
80
21

Table A.1 (Cont'd)

File Title
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12033-12-18-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
6.06 5.35 4.96 4.53 4.02 3.31 2.05 1.36
700
5.94 5.12 4.76 4.29 3.78 3.07 1.89 1.36
700
6.38 5.47 5.08 4.53 3.94 3.11 1.81 1.37
700
6.18 5.43 5.08 4.61 4.13 3.46 2.20 1.44
700
6.18 5.31 4.96 4.45 3.94 3.15 1.89 1.45
700
5.87 5.04 4.72 4.21 3.78 3.03 1.85 1.48
700
6.69 5.75 5.31 4.72 4.13 3.27 1.89 1.48
700
6.81 5.83 5.47 4.80 4.21 3.31 1.89 1.49
700
6.77 5.79 5.35 4.72 4.17 3.27 1.89 1.49
700
5.67 4.92 4.65 4.17 3.70 3.03 1.85 1.51
700
6.10 5.28 4.92 4.37 3.90 3.15 1.89 1.52
700
6.26 5.35 5.00 4.45 3.90 3.15 1.89 1.53
700
6.14 5.35 5.04 4.57 4.06 3.39 2.13 1.54
700
6.14 5.24 4.88 4.33 3.86 3.03 1.77 1.60
700
5.98 5.12 4.76 4.25 3.74 3.03 1.81 1.66
700
6.26 5.35 5.00 4.45 3.90 3.15 1.85 1.74
700
5.59 4.80 4.49 4.09 3.66 2.99 1.85 1.75
700
6.65 5.63 5.28 4.72 4.21 3.39 2.05 1.81
700
6.85 5.79 5.39 4.80 4.25 3.31 1.89 1.83
700
6.61 5.63 5.24 4.72 4.17 3.43 2.09 1.87
700
3.94 3.46 3.27 2.95 2.64 2.09 1.26 1.05
700
5.98 5.31 4.96 4.49 4.06 3.39 2.17 1.27
700
3.94 3.50 3.27 2.95 2.64 2.13 1.26 1.28
700
4.13 3.62 3.35 3.03 2.72 2.17 1.30 1.38
700
236

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,862
49
19
1,630
56
21
1,517
38
22
1,791
59
18
1,671
44
21
1,708
53
21
1,460
35
21
1,493
32
22
1,415
36
21
1,890
51
21
1,691
46
21
1,524
48
21
1,778
55
18
1,635
39
22
1,607
51
22
1,604
42
21
1,914
58
21
1,444
48
19
1,446
33
21
1,407
54
18
3,143
46
32
1,884
56
17
3,289
41
32
2,760
52
30

Table A.1 (Cont'd)

File Title
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.83 5.12 4.80 4.37 3.94 3.31 2.13 1.45
700
5.43 4.69 4.29 3.82 3.39 2.60 1.46 1.48
700
4.13 3.54 3.31 2.99 2.68 2.13 1.30 1.53
700
7.72 6.57 5.98 5.24 4.65 3.58 2.05 1.53
700
4.69 4.06 3.78 3.35 3.03 2.40 1.42 1.59
700
3.98 3.43 3.11 2.80 2.44 1.89 1.06 1.59
700
4.17 3.66 3.35 3.03 2.64 2.17 1.30 1.64
700
4.09 3.54 3.31 2.95 2.68 2.13 1.26 1.72
700
4.13 3.58 3.31 2.95 2.64 2.13 1.26 1.73
700
3.90 3.31 3.03 2.68 2.36 1.85 1.06 1.73
700
4.29 3.74 3.50 3.11 2.76 2.24 1.30 1.74
700
5.47 4.72 4.33 3.82 3.39 2.64 1.46 1.76
700
7.44 6.34 5.79 5.04 4.45 3.43 1.89 1.76
700
4.06 3.46 3.19 2.80 2.48 1.89 1.02 1.77
700
3.98 3.46 3.19 2.87 2.56 2.05 1.18 1.84
700
7.44 6.34 5.75 5.04 4.41 3.43 1.89 1.86
700
4.09 3.58 3.31 2.99 2.68 2.17 1.26 1.89
700
4.21 3.54 3.27 2.87 2.52 1.97 1.10 1.97
700
4.41 3.74 3.35 2.95 2.60 1.97 1.06 2.05
700
3.94 3.43 3.15 2.83 2.52 2.05 1.18 2.09
700
3.98 3.43 3.11 2.80 2.44 1.93 1.06 2.10
700
4.25 3.62 3.31 2.91 2.56 2.01 1.10 2.10
700
4.69 4.06 3.70 3.35 2.95 2.40 1.38 2.17
700
3.74 3.19 2.91 2.56 2.28 1.81 1.02 2.19
700
237

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,871
64
17
1,852
33
27
2,433
65
29
1,059
32
18
2,289
50
28
2,392
46
36
2,283
64
28
2,783
50
31
2,388
60
30
2,204
61
35
2,581
46
30
1,866
31
27
1,172
27
20
2,524
36
40
2,807
46
33
1,136
29
20
2,974
44
31
2,106
51
35
1,937
42
36
2,778
50
32
2,471
45
37
2,164
44
35
2,181
47
27
2,379
62
37

Table A.1 (Cont'd)

File Title
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I69-CS12034-09-11-2001
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.37 3.66 3.31 2.91 2.56 1.93 1.02 2.21
700
4.29 3.74 3.46 3.11 2.76 2.28 1.30 2.32
700
4.09 3.50 3.23 2.91 2.60 2.09 1.18 2.38
700
4.33 3.66 3.31 2.91 2.56 1.97 1.02 2.50
700
3.78 3.19 2.91 2.60 2.32 1.89 1.10 2.53
700
4.21 3.58 3.27 2.87 2.52 2.05 1.10 2.93
700
7.72 6.85 6.34 5.75 5.08 4.02 2.36 0.86
300
9.13 8.15 7.64 6.89 6.14 5.00 3.07 0.87
300
7.87 6.97 6.46 5.87 5.24 4.13 2.44 0.92
300
7.17 6.34 5.79 5.24 4.61 3.62 2.09 1.00
300
7.91 6.97 6.46 5.87 5.20 4.13 2.44 1.00
300
8.70 7.72 7.17 6.50 5.83 4.65 2.76 1.03
300
8.66 7.68 7.13 6.50 5.79 4.61 2.72 1.03
300
7.76 6.85 6.38 5.75 5.12 4.09 2.40 1.07
300
8.70 7.68 7.17 6.54 5.83 4.65 2.76 1.08
300
7.17 6.30 5.79 5.20 4.65 3.62 2.09 1.08
300
7.80 6.93 6.42 5.83 5.20 4.13 2.40 1.09
300
6.46 5.71 5.28 4.76 4.25 3.35 1.93 1.11
300
10.39 9.17 8.50 7.72 6.85 5.35 3.03 1.11
300
7.76 6.85 6.34 5.75 5.12 4.06 2.36 1.15
300
9.37 8.15 7.52 6.73 5.98 4.61 2.60 1.16
300
6.42 5.71 5.24 4.76 4.25 3.35 1.93 1.17
300
9.13 8.11 7.52 6.89 6.14 5.00 3.03 1.17
300
10.39 9.17 8.54 7.72 6.85 5.39 3.03 1.18
300
238

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,995
39
38
2,737
43
30
2,715
44
33
2,173
34
38
2,320
77
34
2,283
45
35
1,443
32
13
1,290
35
10
1,451
32
13
1,439
36
15
1,388
34
13
1,341
30
11
1,359
28
12
1,452
33
13
1,365
29
11
1,462
36
15
1,547
28
13
1,770
36
17
1,186
18
11
1,473
31
13
1,101
25
12
1,832
34
17
1,275
34
10
1,210
17
11

Table A.1 (Cont'd)

File Title
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
10.35 9.13 8.50 7.68 6.85 5.39 3.03 1.26
300
9.96 8.66 8.03 7.09 6.18 4.76 2.52 1.27
300
7.83 6.81 6.30 5.67 5.00 3.86 2.13 1.28
300
9.17 8.15 7.56 6.89 6.18 5.04 3.03 1.28
300
7.76 6.77 6.30 5.59 4.92 3.86 2.13 1.30
300
9.88 8.50 7.83 6.93 6.10 4.65 2.52 1.30
300
7.99 6.97 6.46 5.79 5.08 3.98 2.20 1.30
300
6.50 5.75 5.31 4.80 4.25 3.39 1.93 1.31
300
10.43 9.13 8.39 7.56 6.61 5.12 2.76 1.33
300
9.80 8.46 7.83 6.93 6.06 4.65 2.48 1.34
300
9.92 8.62 7.99 7.05 6.18 4.76 2.52 1.35
300
7.95 6.93 6.42 5.79 5.16 4.06 2.32 1.37
300
9.37 8.15 7.52 6.69 5.94 4.65 2.60 1.38
300
8.50 7.40 6.81 6.10 5.39 4.17 2.28 1.38
300
7.64 6.69 6.18 5.59 4.92 3.90 2.20 1.39
300
7.99 7.01 6.46 5.75 5.08 4.02 2.24 1.40
300
7.87 6.89 6.42 5.79 5.12 4.06 2.28 1.40
300
9.88 8.50 7.83 6.97 6.14 4.65 2.48 1.41
300
6.77 5.87 5.47 4.88 4.33 3.39 1.89 1.42
300
6.77 5.87 5.47 4.88 4.33 3.39 1.89 1.42
300
7.64 6.69 6.18 5.55 4.92 3.90 2.20 1.42
300
8.43 7.36 6.85 6.06 5.35 4.17 2.24 1.42
300
9.37 8.15 7.48 6.73 5.94 4.65 2.60 1.43
300
7.91 6.93 6.46 5.75 5.16 4.09 2.32 1.43
300
239

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,228
17
11
1,076
17
13
1,422
25
15
1,299
33
10
1,390
27
15
1,005
21
13
1,369
25
15
1,795
34
17
1,095
16
12
1,058
19
13
1,081
17
13
1,395
30
14
1,092
25
12
1,304
22
15
1,481
29
15
1,326
29
14
1,505
25
14
1,057
18
13
1,615
31
17
1,617
31
17
1,436
30
15
1,357
20
15
1,100
25
12
1,455
28
14

Table A.1 (Cont'd)

File Title
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-11-18-2002
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.99 6.97 6.42 5.75 5.08 3.98 2.20 1.43
300
8.43 7.36 6.81 6.10 5.35 4.17 2.24 1.44
300
7.80 6.77 6.26 5.59 4.96 3.86 2.13 1.45
300
7.68 6.73 6.18 5.55 4.92 3.90 2.20 1.46
300
10.43 9.13 8.39 7.56 6.61 5.16 2.76 1.52
300
10.39 9.09 8.31 7.52 6.57 5.12 2.76 1.53
300
10.63 9.13 8.46 7.48 6.50 5.04 2.68 1.55
300
7.17 6.30 5.79 5.16 4.61 3.66 2.05 1.58
300
6.77 5.83 5.43 4.88 4.29 3.39 1.89 1.63
300
10.55 9.09 8.31 7.40 6.42 4.96 2.60 1.67
300
9.96 8.62 7.83 7.05 6.18 4.76 2.52 1.75
300
10.63 9.17 8.35 7.48 6.50 5.04 2.64 1.82
300
10.04 8.35 7.68 6.85 6.06 4.69 2.64 1.95
300
10.08 8.39 7.68 6.85 6.06 4.69 2.60 2.10
300
10.08 8.35 7.68 6.85 6.06 4.69 2.60 2.18
300
12.80 11.26 10.47 9.21 8.19 6.38 3.62 0.92
300
8.86 7.72 7.09 6.22 5.51 4.29 2.44 1.03
300
8.07 7.05 6.50 5.71 5.08 3.98 2.28 1.08
300
9.33 8.35 7.72 6.85 6.22 5.00 2.99 1.15
300
9.41 8.35 7.72 6.89 6.22 5.04 3.03 1.21
300
9.96 8.78 8.07 7.17 6.46 5.20 3.11 1.23
300
6.77 5.94 5.47 4.84 4.41 3.46 2.05 1.25
300
9.33 8.23 7.56 6.69 5.98 4.69 2.64 1.27
300
6.73 5.94 5.47 4.84 4.37 3.46 2.01 1.28
300
240

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,348
27
15
1,384
19
15
1,390
27
15
1,399
31
15
1,099
16
12
1,099
17
12
953
19
12
1,507
33
16
1,587
33
17
966
18
13
1,075
18
13
976
17
13
808
32
12
812
31
12
820
30
12
761
18
8
964
31
12
1,117
34
13
1,109
32
10
1,081
34
10
915
35
9
1,318
48
14
1,071
25
12
1,432
42
15

Table A.1 (Cont'd)

File Title
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.28 6.30 5.75 5.12 4.57 3.62 2.13 1.28
300
8.86 7.68 7.05 6.18 5.51 4.33 2.48 1.29
300
8.35 7.28 6.65 5.91 5.28 4.13 2.36 1.31
300
9.45 8.35 7.76 6.89 6.26 5.04 2.99 1.36
300
7.28 6.30 5.79 5.12 4.57 3.62 2.09 1.40
300
9.25 8.11 7.44 6.50 5.83 4.49 2.44 1.45
300
8.66 7.56 6.97 6.10 5.43 4.21 2.28 1.46
300
9.25 8.15 7.52 6.65 5.98 4.69 2.60 1.48
300
8.70 7.60 6.97 6.10 5.51 4.25 2.36 1.49
300
9.09 8.03 7.40 6.57 5.91 4.76 2.76 1.50
300
8.70 7.60 6.97 6.14 5.51 4.25 2.32 1.51
300
8.62 7.52 6.89 6.02 5.39 4.17 2.28 1.52
300
9.96 8.78 8.07 7.17 6.42 5.20 3.03 1.53
300
8.31 7.28 6.69 5.91 5.28 4.17 2.32 1.58
300
8.11 7.01 6.42 5.67 5.04 3.98 2.24 1.59
300
7.36 6.26 5.79 5.08 4.61 3.62 2.13 1.59
300
8.23 7.05 6.50 5.71 5.12 4.02 2.28 1.64
300
8.19 7.05 6.46 5.71 5.12 4.02 2.28 1.64
300
9.25 8.15 7.48 6.61 5.91 4.69 2.60 1.65
300
8.35 7.28 6.69 5.91 5.31 4.17 2.32 1.65
300
8.50 7.36 6.73 5.87 5.24 4.02 2.13 1.74
300
8.70 7.60 6.97 6.06 5.47 4.25 2.32 1.74
300
7.44 6.18 5.67 5.00 4.49 3.54 2.09 1.74
300
8.54 7.44 6.81 5.91 5.24 4.06 2.13 1.78
300
241

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,133
49
14
942
34
12
1,085
33
13
1,095
32
10
1,186
44
14
1,069
21
13
1,141
23
14
1,168
22
12
1,111
26
13
1,123
31
11
1,151
23
13
1,110
25
14
946
31
10
1,187
28
13
1,082
35
13
1,124
48
14
1,052
36
13
1,076
35
13
1,128
23
12
1,193
28
13
1,128
22
15
1,109
25
13
895
59
14
1,127
22
15

Table A.1 (Cont'd)

File Title
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-28-2004
rigid-So-I94-CS11081-10-30-2001
rigid-So-I94-CS11081-10-30-2001
rigid-So-I94-CS11081-10-30-2001
rigid-So-I94-CS11081-10-30-2001
rigid-So-I94-CS11081-10-30-2001
rigid-So-I94-CS11081-10-30-2001
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.05 5.94 5.47 4.80 4.37 3.50 2.09 1.83
300
9.37 8.19 7.48 6.57 5.91 4.61 2.48 1.90
300
8.90 7.52 6.97 6.22 5.71 4.69 2.91 1.92
300
8.94 7.44 6.93 6.14 5.63 4.65 2.91 1.94
300
8.39 7.24 6.65 5.71 5.08 3.90 2.01 1.95
300
7.52 6.22 5.71 5.00 4.49 3.54 2.05 1.97
300
9.45 7.72 7.09 6.22 5.51 4.29 2.44 2.00
300
11.57 10.04 9.13 7.99 7.05 5.39 2.68 2.02
300
8.82 7.44 6.89 6.14 5.71 4.65 2.87 2.20
300
9.45 7.68 7.01 6.14 5.47 4.25 2.40 2.22
300
7.48 6.22 5.67 5.00 4.49 3.58 2.05 2.26
300
9.53 7.68 7.05 6.14 5.51 4.25 2.40 2.36
300
9.96 8.23 7.64 6.89 6.26 5.04 3.03 2.37
300
8.58 7.48 7.01 6.22 5.59 4.37 2.60 0.89
8.58 7.52 7.05 6.26 5.63 4.41 2.60 0.92
9.88 8.66 8.19 7.36 6.61 5.28 3.19 1.01
9.69 8.58 7.99 7.17 6.50 5.16 3.07 1.07
8.70 7.60 7.09 6.34 5.67 4.49 2.64 1.09
9.65 8.50 7.99 7.17 6.46 5.16 3.03 1.20
5.15 4.80 4.64 4.31 4.01 3.31 2.14 0.62
250
8.30 7.26 6.77 6.03 5.25 3.95 2.05 0.86
250
5.30 4.77 4.46 4.13 3.69 2.94 1.75 0.87
250
5.19 4.77 4.67 4.38 3.96 3.33 2.20 0.93
250
4.93 4.52 4.32 4.07 3.74 3.09 1.95 0.95
250
242

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,004
64
14
1,061
22
13
813
62
10
722
69
10
1,118
22
16
887
55
14
681
41
12
891
11
12
816
62
10
676
42
12
911
55
14
656
42
12
726
46
9
1,166
35
12
1,228
32
12
1,120
30
10
1,183
29
10
1,187
32
12
1,247
26
10
4,737
19
14
1,362
16
15
2,651
37
17
4,175
35
13
4,600
21
16

Table A.1 (Cont'd)

File Title
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-05-14-2008
rigid-So-US31-CS11057-10-09-2001
rigid-So-US31-CS11057-10-09-2001
rigid-So-US31-CS11057-10-09-2001
rigid-So-US31-CS11057-10-09-2001
rigid-So-US31-CS11057-10-09-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.90 4.50 4.29 4.02 3.70 3.06 1.93 0.98
250
4.13 3.74 3.56 3.26 3.00 2.42 1.45 1.01
250
8.26 7.24 6.69 6.02 5.24 3.96 2.06 1.02
250
4.76 4.33 4.21 3.96 3.64 3.04 1.94 1.13
250
8.32 7.25 6.74 6.05 5.31 3.98 2.05 1.15
250
4.88 4.45 4.28 4.03 3.74 3.09 1.95 1.17
250
4.67 4.26 4.13 3.88 3.62 3.04 1.96 1.22
250
5.31 4.75 4.42 4.12 3.71 2.97 1.76 1.30
250
4.17 3.73 3.55 3.32 3.01 2.43 1.46 1.31
250
4.78 4.37 4.16 3.99 3.69 3.04 1.95 1.36
250
4.76 4.33 4.16 3.98 3.64 3.06 1.94 1.41
250
4.17 3.67 3.49 3.19 2.89 2.32 1.35 1.50
250
6.71 5.60 5.21 4.65 4.01 3.02 1.64 1.53
250
5.34 4.73 4.41 4.13 3.72 2.99 1.78 1.56
250
4.67 4.25 4.04 3.88 3.61 3.01 1.93 1.61
250
6.71 5.63 5.16 4.63 4.01 3.04 1.63 1.68
250
4.19 3.71 3.47 3.22 2.92 2.35 1.35 1.75
250
6.69 5.63 5.18 4.63 4.06 3.06 1.61 1.82
250
4.19 3.69 3.44 3.22 2.97 2.31 1.35 1.99
250
7.68 6.57 6.10 5.39 4.76 3.74 2.17 1.46
700
7.48 6.50 5.94 5.31 4.72 3.74 2.13 1.78
700
7.76 6.54 6.02 5.35 4.80 3.78 2.20 2.07
700
7.68 6.42 5.87 5.24 4.65 3.66 2.13 2.10
700
7.68 6.50 5.94 5.31 4.72 3.74 2.13 2.23
700
243

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
4,430
23
16
4,324
31
21
1,382
16
15
5,192
17
16
1,422
14
16
5,039
14
17
5,638
15
16
2,698
38
16
4,325
31
21
5,240
16
16
5,430
13
17
3,517
43
22
1,256
38
17
2,709
39
16
5,569
15
16
1,278
37
18
3,824
33
23
1,381
32
18
3,783
34
23
1,228
31
18
1,407
27
19
1,201
35
18
1,109
38
18
1,222
33
18

Table A.1 (Cont'd)

File Title
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001
rigid-So-US31-CS11057-10-30-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
6.57 5.94 5.55 5.08 4.61 3.66 2.32 0.59
700
7.48 6.61 6.10 5.47 4.88 3.94 2.52 0.60
700
6.73 6.06 5.63 5.08 4.53 3.54 2.05 0.66
700
12.28 10.87 10.16 9.25 8.31 6.73 4.37 0.67
700
6.73 6.06 5.63 5.04 4.49 3.54 2.09 0.67
700
12.56 11.18 10.51 9.53 8.58 6.97 4.49 0.77
700
6.93 6.22 5.87 5.35 4.80 3.86 2.44 0.78
700
12.24 10.87 10.16 9.21 8.27 6.73 4.29 0.79
700
6.57 5.91 5.55 5.08 4.53 3.70 2.28 0.93
700
6.26 5.43 5.08 4.61 4.13 3.43 2.28 0.96
700
6.73 6.10 5.67 5.12 4.49 3.58 2.05 0.98
700
7.76 6.85 6.38 5.75 5.20 4.25 2.72 0.98
700
7.48 6.57 6.06 5.47 4.88 3.98 2.52 1.01
700
8.07 7.09 6.65 5.98 5.39 4.45 2.87 1.04
700
7.80 6.85 6.38 5.75 5.20 4.25 2.72 1.06
700
10.04 8.90 8.31 7.72 6.97 5.83 3.90 1.10
700
7.87 6.89 6.38 5.79 5.16 4.17 2.60 1.11
700
9.49 8.39 7.91 7.20 6.54 5.47 3.58 1.17
700
6.38 5.59 5.16 4.72 4.21 3.54 2.32 1.25
700
6.22 5.39 5.08 4.61 4.09 3.43 2.24 1.28
700
6.38 5.59 5.24 4.72 4.21 3.43 2.09 1.36
700
9.57 8.46 7.91 7.28 6.57 5.55 3.62 1.41
700
6.57 5.79 5.39 4.88 4.33 3.54 2.09 1.62
700
6.34 5.59 5.20 4.72 4.21 3.46 2.05 1.74
700
244

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
2,140
31
18
1,253
49
15
2,031
18
21
890
28
9
1,883
24
20
925
23
9
1,952
30
16
929
25
9
2,208
28
18
1,428
81
17
1,987
17
21
1,366
46
14
1,278
49
15
1,267
47
13
1,319
48
14
1,160
41
9
1,292
39
15
1,228
41
11
1,448
73
16
1,512
74
17
1,854
39
19
1,213
42
10
1,891
30
19
2,052
31
20

Table A.1 (Cont'd)

File Title
rigid-So-US31-CS11057-06-06-2003
rigid-So-US31-CS11057-06-06-2003
rigid-So-US31-CS11057-06-06-2003
rigid-So-US31-CS11057-06-06-2003
rigid-So-US31-CS11057-06-06-2003
rigid-So-US31-CS11057-06-06-2003
rigid-So-US31-CS11057-06-06-2003
rigid-So-US31-CS11057-06-06-2003
rigid-So-US31-CS11057-06-06-2003
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
8.35 7.13 6.50 5.63 4.92 3.70 2.01 1.30
700
8.07 6.81 6.10 5.28 4.53 3.31 1.73 1.31
700
8.31 7.13 6.50 5.63 4.88 3.70 1.97 1.43
700
8.31 7.09 6.46 5.59 4.88 3.70 2.01 1.44
700
8.82 7.68 7.17 6.50 5.98 4.80 2.99 1.66
700
8.82 7.64 7.13 6.42 5.91 4.76 2.95 1.79
700
8.11 6.85 6.10 5.31 4.57 3.35 1.69 1.79
700
6.50 5.67 5.20 4.65 4.13 3.27 1.81 1.89
700
6.50 5.71 5.24 4.69 4.17 3.31 1.81 1.90
700
12.13 10.67 9.92 9.02 8.11 6.61 4.33 0.77
700
11.38 10.35 9.72 9.06 8.27 6.97 4.69 0.87
700
11.61 10.20 9.45 8.54 7.72 6.30 4.09 0.90
700
12.20 11.02 10.39 9.65 8.86 7.48 5.04 1.01
700
12.52 10.87 10.00 8.90 7.83 6.06 3.50 1.05
700
11.38 10.31 9.69 9.02 8.23 6.97 4.65 1.06
700
13.07 11.34 10.39 9.33 8.19 6.34 3.70 1.08
700
12.52 10.87 9.96 8.94 7.83 6.06 3.50 1.11
700
9.45 8.27 7.60 6.89 6.14 4.88 2.99 1.12
700
8.11 7.13 6.57 5.98 5.35 4.29 2.64 1.19
700
8.11 7.13 6.57 5.98 5.35 4.29 2.64 1.20
700
10.20 8.90 8.23 7.44 6.65 5.31 3.23 1.26
700
9.45 8.27 7.60 6.85 6.14 4.88 2.95 1.28
700
11.57 10.20 9.37 8.50 7.68 6.34 4.06 1.28
700
8.15 7.05 6.50 5.94 5.28 4.21 2.60 1.35
700
245

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
969
21
18
915
21
22
1,002
19
19
969
22
18
1,249
30
12
1,192
31
12
968
18
22
1,714
21
21
1,822
17
22
783
30
8
1,248
28
8
795
33
9
1,130
27
7
766
16
11
1,246
28
8
712
16
10
768
16
11
1,027
28
12
1,281
32
14
1,271
32
14
978
24
11
1,044
26
12
804
33
9
1,166
34
14

Table A.1 (Cont'd)

File Title
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-So-US31-CS11057-10-10-2002
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.91 6.69 6.06 5.31 4.61 3.46 1.89 1.41
700
11.89 10.35 9.53 8.50 7.52 5.83 3.23 1.46
700
7.87 6.65 6.02 5.28 4.57 3.46 1.89 1.52
700
8.15 6.89 6.26 5.51 4.76 3.62 1.97 1.59
700
11.77 10.20 9.37 8.39 7.40 5.75 3.15 1.67
700
8.31 7.17 6.54 5.83 5.12 3.98 2.20 1.69
700
11.73 10.20 9.37 8.39 7.40 5.75 3.11 1.70
700
7.72 6.61 6.02 5.35 4.72 3.66 2.05 1.74
700
7.76 6.65 6.02 5.35 4.69 3.66 2.05 1.78
700
7.80 6.42 5.79 5.12 4.41 3.31 1.81 1.95
700
7.76 6.38 5.79 5.08 4.41 3.31 1.81 1.96
700
7.56 6.26 5.63 4.72 3.90 2.28 0.94 2.12
700
7.13 5.91 5.28 4.49 3.66 2.17 0.94 2.17
700
7.76 6.34 5.71 5.04 4.37 3.27 1.77 2.24
700
8.39 7.48 6.93 6.26 5.55 4.49 2.80 0.60
250
5.59 4.92 4.53 4.09 3.62 2.83 1.69 0.65
250
6.81 5.94 5.43 4.88 4.21 3.27 1.89 0.74
250
4.80 4.21 3.94 3.50 3.03 2.40 1.42 0.76
250
6.97 5.94 5.43 4.88 4.21 3.23 1.89 0.80
250
5.35 4.65 4.37 3.98 3.50 2.83 1.81 0.82
250
5.71 5.12 4.88 4.53 4.06 3.31 2.13 0.87
250
4.96 4.33 3.98 3.62 3.11 2.44 1.50 0.88
250
4.96 4.25 3.94 3.50 3.11 2.40 1.42 0.88
250
5.71 5.04 4.69 4.29 3.70 2.95 1.81 0.91
250
246

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,021
25
20
907
12
12
1,014
25
20
1,005
23
19
948
11
13
1,162
20
17
973
10
13
1,210
25
19
1,152
27
19
949
29
21
964
29
21
850
12
43
880
15
42
948
28
21
1,148
42
10
1,668
52
16
1,229
43
15
1,811
62
19
1,065
48
14
1,617
80
14
2,271
56
12
1,653
74
18
1,644
66
19
1,690
59
15

Table A.1 (Cont'd)

File Title
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
8.50 7.36 7.01 6.18 5.47 4.45 2.95 0.92
250
6.93 5.87 5.39 4.88 4.21 3.31 2.09 0.92
250
9.17 7.87 7.17 6.50 5.71 4.49 2.80 0.93
250
4.84 4.37 4.09 3.78 3.31 2.68 1.69 0.93
250
7.24 6.22 5.75 5.20 4.49 3.50 2.09 0.96
250
6.10 5.35 5.00 4.49 3.90 3.11 1.81 0.97
250
5.59 4.76 4.45 3.94 3.39 2.64 1.54 0.99
250
7.20 6.18 5.79 5.12 4.37 3.39 1.97 1.00
250
7.56 6.50 5.83 5.24 4.41 3.27 1.81 1.00
250
5.28 4.57 4.21 3.78 3.23 2.60 1.57 1.05
250
6.81 5.87 5.51 4.92 4.21 3.39 2.13 1.07
250
6.81 5.79 5.28 4.84 4.21 3.31 2.09 1.09
250
5.00 4.29 3.98 3.62 3.11 2.44 1.46 1.10
250
9.65 8.54 7.80 7.24 6.38 5.08 3.11 1.11
250
5.20 4.53 4.17 3.74 3.19 2.60 1.61 1.12
250
7.40 6.10 5.51 4.88 4.09 3.11 1.77 1.13
250
8.27 7.20 6.61 5.98 5.16 4.02 2.24 1.15
250
6.89 5.87 5.35 4.80 4.17 3.23 1.85 1.16
250
5.31 4.61 4.37 3.98 3.46 2.87 1.85 1.17
250
6.42 5.55 5.08 4.65 3.98 3.07 1.77 1.18
250
6.65 5.83 5.31 4.84 4.21 3.31 1.89 1.20
250
7.36 6.30 5.67 5.08 4.37 3.43 1.97 1.20
250
5.39 4.69 4.29 3.98 3.50 2.83 1.77 1.25
250
5.91 5.12 4.65 4.25 3.70 2.87 1.65 1.26
250
247

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
859
61
9
951
68
13
784
46
9
2,265
69
16
1,174
46
13
1,618
43
15
1,363
59
17
1,107
44
14
1,000
35
16
1,448
74
17
1,073
63
12
1,015
68
13
1,685
68
19
1,031
34
9
1,404
84
17
814
49
16
1,134
28
12
1,146
44
15
1,602
87
14
1,377
43
16
1,418
39
15
1,008
48
14
1,621
76
15
1,514
47
17

Table A.1 (Cont'd)

File Title
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.52 6.69 6.14 5.75 5.20 4.21 2.83 1.27
250
6.54 5.71 5.24 4.80 4.25 3.35 1.97 1.27
250
5.79 5.04 4.72 4.25 3.66 2.83 1.50 1.27
250
6.57 5.71 5.28 4.84 4.25 3.39 2.01 1.27
250
9.06 7.64 7.05 6.22 5.35 4.02 2.13 1.27
250
5.75 5.04 4.80 4.25 3.66 2.87 1.54 1.28
250
7.72 6.34 5.83 5.20 4.49 3.46 2.05 1.29
250
6.50 5.63 5.12 4.61 3.98 3.11 1.73 1.29
250
9.06 7.68 7.09 6.30 5.35 4.09 2.20 1.29
250
7.52 6.22 5.55 4.96 4.17 3.15 1.77 1.29
250
7.56 6.42 5.87 5.20 4.33 3.31 1.77 1.31
250
5.16 4.29 3.90 3.46 3.03 2.36 1.38 1.31
250
7.17 6.18 5.67 5.20 4.41 3.50 2.09 1.31
250
7.83 6.42 5.91 5.28 4.57 3.50 2.09 1.32
250
5.91 5.12 4.65 4.25 3.66 2.87 1.61 1.45
250
8.11 6.93 6.26 5.67 4.92 3.78 2.09 1.53
250
5.00 4.33 3.90 3.62 3.15 2.48 1.46 1.60
250
5.16 4.29 3.86 3.50 3.03 2.36 1.38 1.60
250
7.83 6.46 5.83 5.28 4.61 3.54 2.09 1.62
250
8.39 7.28 6.57 6.02 5.24 4.09 2.28 1.63
250
6.22 5.39 4.88 4.49 3.94 3.03 1.69 1.64
250
4.96 4.25 3.90 3.58 3.11 2.44 1.38 1.68
250
5.12 4.09 3.82 3.43 2.95 2.40 1.46 2.06
250
5.71 4.72 4.25 3.78 3.19 2.36 1.14 2.18
250
248

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,250
67
9
1,490
45
14
1,920
26
20
1,485
46
13
945
25
14
2,000
26
20
805
52
13
1,352
40
16
945
27
13
816
47
16
1,019
34
16
1,219
80
19
1,146
49
13
795
52
13
1,540
44
17
1,047
33
13
1,758
66
19
1,262
77
19
817
52
13
1,116
29
12
1,628
37
17
1,872
53
20
1,090
104
18
1,403
31
25

Table A.1 (Cont'd)

File Title
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-13-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.71 4.72 4.25 3.74 3.15 2.36 1.14 2.23
250
5.75 4.69 4.21 3.82 3.23 2.40 1.18 2.71
250
7.72 5.94 5.28 4.72 4.06 2.99 1.61 2.93
250
7.36 6.18 5.63 4.88 4.17 3.07 1.69 0.53
150
8.82 7.60 7.13 6.30 5.51 4.29 2.44 0.68
150
7.52 6.30 5.63 4.92 4.25 3.11 1.65 0.70
150
7.44 6.26 5.59 4.92 4.21 3.11 1.65 0.70
150
9.13 7.87 7.28 6.50 5.55 4.17 2.24 0.78
150
6.50 5.59 5.12 4.65 4.09 3.23 1.97 0.79
150
9.96 8.62 7.99 7.17 6.18 4.72 2.56 0.79
150
5.00 4.37 4.06 3.62 3.11 2.36 1.26 0.81
150
11.22 9.88 9.13 8.23 7.05 5.31 2.68 0.83
150
10.43 9.02 8.23 7.32 6.22 4.72 2.60 0.88
150
8.62 7.36 6.73 5.98 5.16 3.78 1.93 0.89
150
10.63 9.25 8.54 7.72 6.61 5.08 2.76 0.90
150
9.21 7.95 7.28 6.57 5.63 4.21 2.24 0.91
150
10.28 8.86 8.23 7.40 6.34 4.80 2.56 0.94
150
11.42 9.84 8.94 8.07 6.93 5.16 2.76 0.95
150
9.41 7.99 7.32 6.61 5.67 4.37 2.48 0.98
150
9.84 8.27 7.72 6.77 5.83 4.33 2.32 0.98
150
9.25 7.80 7.09 6.26 5.47 4.02 2.13 0.99
150
9.80 8.46 7.87 7.01 5.94 4.57 2.44 0.99
150
5.08 4.37 4.06 3.62 3.07 2.36 1.26 1.02
150
9.21 7.95 7.28 6.61 5.67 4.25 2.28 1.03
150
249

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,340
33
25
1,428
35
25
715
50
17
813
54
11
935
44
8
814
50
12
841
50
12
915
33
9
1,094
78
9
895
30
7
1,878
52
15
951
17
8
692
36
7
960
30
10
848
28
7
932
31
9
878
28
8
702
27
7
768
45
7
752
34
8
777
36
9
869
30
8
1,629
58
15
951
32
9

Table A.1 (Cont'd)

File Title
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS49025-06-02-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
10.00 8.58 7.83 7.09 6.10 4.61 2.48 1.06
150
9.80 8.50 7.76 7.05 6.06 4.61 2.44 1.09
150
10.83 9.45 8.58 7.87 6.81 5.16 2.83 1.11
150
9.49 8.07 7.28 6.61 5.75 4.37 2.48 1.11
150
10.16 8.82 7.95 7.24 6.34 4.80 2.64 1.15
150
10.51 9.09 8.27 7.56 6.46 4.88 2.60 1.19
150
10.00 8.66 7.83 7.17 6.10 4.65 2.52 1.22
150
9.49 8.15 7.44 6.77 5.91 4.49 2.44 1.25
150
10.20 8.46 7.56 6.65 5.67 4.17 2.09 1.27
150
9.33 7.80 7.05 6.34 5.43 4.02 2.09 1.40
150
9.41 8.11 7.36 6.73 5.94 4.45 2.44 1.41
150
10.28 8.50 7.56 6.73 5.79 4.21 2.17 1.44
150
7.36 6.18 5.59 4.84 4.06 2.91 1.26 1.44
150
10.51 9.02 8.19 7.52 6.46 4.88 2.56 1.50
150
10.28 8.50 7.52 6.77 5.79 4.21 2.17 1.65
150
5.63 4.41 4.09 3.58 3.03 2.24 1.14 2.19
150
6.02 4.96 4.41 3.86 3.27 2.28 0.91 2.35
150
7.83 6.77 6.26 5.59 4.92 3.82 2.44 0.49
600
7.76 6.65 6.10 5.47 4.76 3.70 2.32 0.69
600
7.13 6.18 5.71 5.16 4.53 3.58 2.28 0.69
600
8.58 7.52 7.01 6.26 5.43 4.33 2.60 0.97
600
7.72 6.69 6.14 5.43 4.72 3.74 2.24 0.98
600
8.03 6.93 6.38 5.71 4.88 3.74 2.09 1.08
600
9.57 8.11 7.48 6.77 5.75 4.45 2.64 1.32
600
250

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
825
31
8
937
28
8
842
28
7
754
44
7
828
32
7
846
27
7
835
32
8
937
34
8
630
32
9
783
35
9
941
34
8
618
34
9
1,086
24
17
868
26
8
624
33
9
1,016
64
16
1,387
24
24
1,039
40
15
1,008
40
16
1,236
43
16
1,168
25
14
1,079
34
16
1,205
22
19
884
26
14

Table A.1 (Cont'd)

File Title
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
9.41 8.11 7.52 6.77 5.98 4.69 2.76 1.33
600
9.25 7.83 7.17 6.38 5.59 4.21 2.40 1.33
600
9.65 8.23 7.48 6.77 5.87 4.53 2.64 1.41
600
7.80 6.50 6.02 5.31 4.49 3.35 1.81 1.45
600
8.11 6.85 6.34 5.71 4.88 3.74 2.13 1.46
600
8.03 6.77 6.30 5.67 4.88 3.86 2.32 1.47
600
8.11 6.93 6.34 5.67 4.92 3.78 2.09 1.52
600
7.83 6.54 6.02 5.35 4.49 3.39 1.85 1.53
600
7.99 6.89 6.42 5.94 5.16 4.17 2.56 1.60
600
13.19 11.06 10.16 9.02 7.72 5.67 2.91 1.61
600
8.50 7.32 6.65 6.14 5.28 4.06 2.32 1.63
600
6.93 5.91 5.47 5.04 4.41 3.58 2.24 1.66
600
9.69 8.15 7.40 6.69 5.63 4.33 2.44 1.67
600
9.69 8.19 7.48 6.85 5.91 4.57 2.68 1.70
600
6.77 5.75 5.39 4.96 4.29 3.50 2.20 1.70
600
8.03 6.85 6.46 5.94 5.16 4.17 2.56 1.72
600
7.91 6.65 5.94 5.35 4.57 3.46 1.93 1.72
600
6.93 5.98 5.59 5.20 4.61 3.82 2.44 1.75
600
13.31 11.10 10.12 9.02 7.64 5.67 2.91 1.84
600
12.24 10.28 9.37 8.39 7.17 5.55 3.07 1.84
600
8.46 7.28 6.57 6.10 5.31 4.13 2.36 1.99
600
8.11 6.77 6.10 5.55 4.92 3.70 2.20 2.01
600
10.12 8.46 7.56 6.77 5.83 4.41 2.40 2.01
600
6.97 5.91 5.43 5.00 4.41 3.58 2.20 2.01
600
251

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,098
22
14
950
23
16
917
24
14
1,082
23
21
1,128
26
18
1,079
34
16
1,192
22
19
1,067
25
21
1,346
31
14
726
11
14
1,201
21
17
1,378
45
16
840
23
15
930
24
14
1,403
46
16
1,315
31
14
1,022
28
20
1,557
45
14
687
11
14
722
17
13
1,272
21
16
1,011
32
17
819
21
16
1,366
44
17

Table A.1 (Cont'd)

File Title
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17033-05-31-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
9.37 7.91 7.36 6.69 5.71 4.49 2.44 2.18
600
11.50 9.72 8.82 8.03 6.93 5.47 3.03 2.30
600
8.66 7.24 6.61 6.14 5.31 4.17 2.44 2.33
600
7.99 6.57 6.10 5.59 4.96 4.02 2.52 2.35
600
9.41 7.91 7.20 6.57 5.67 4.37 2.32 2.39
600
8.94 7.40 6.77 6.26 5.35 4.21 2.44 2.41
600
8.94 7.40 6.69 6.22 5.35 4.21 2.48 2.48
600
9.41 7.72 7.09 6.50 5.59 4.41 2.56 2.49
600
9.72 7.83 7.17 6.30 5.31 4.17 2.28 2.59
600
9.80 7.91 7.13 6.34 5.35 4.17 2.28 2.62
600
9.92 7.99 7.17 6.38 5.39 4.25 2.32 2.86
600
7.17 6.14 5.63 5.08 4.29 3.19 1.77 1.18
400
10.55 8.82 8.11 7.17 6.22 4.72 2.80 1.28
400
10.43 8.86 8.03 7.24 6.22 4.76 2.76 1.43
400
5.28 4.61 4.29 3.94 3.35 2.64 1.50 1.47
400
10.39 8.86 8.11 7.32 6.26 4.84 2.76 1.48
400
7.40 6.22 5.71 5.12 4.33 3.23 1.73 1.54
400
5.28 4.61 4.21 3.90 3.35 2.64 1.50 1.69
400
9.06 7.60 7.09 6.38 5.43 4.21 2.36 1.83
400
7.36 6.22 5.63 5.08 4.33 3.27 1.73 1.84
400
9.02 7.64 6.97 6.38 5.47 4.17 2.32 1.84
400
9.06 7.60 6.97 6.30 5.47 4.17 2.36 1.85
400
7.40 6.22 5.75 5.24 4.45 3.39 1.85 1.90
400
8.39 6.97 6.50 5.79 4.96 3.74 1.93 2.04
400
252

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,112
17
16
835
17
12
1,112
27
15
1,067
44
14
1,110
16
17
989
28
15
966
30
15
907
27
14
732
26
16
716
27
16
706
28
16
1,273
24
20
776
21
11
844
20
12
2,135
28
23
908
18
12
1,228
23
21
2,122
28
23
1,070
20
14
1,278
22
21
1,095
19
15
1,050
20
14
1,347
22
19
1,191
18
20

Table A.1 (Cont'd)

File Title
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-25-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-I75-CS17034-05-22-2000
rigid-Su-M28-CS02041-08-23-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
8.46 7.05 6.46 5.79 4.96 3.74 1.93 2.11
400
7.40 6.10 5.75 5.24 4.45 3.39 1.89 2.26
400
7.52 6.22 5.71 5.24 4.49 3.43 1.85 2.51
400
9.72 8.50 7.72 7.01 6.06 4.57 2.48 1.19
400
8.82 7.64 7.01 6.38 5.43 4.25 2.48 1.33
400
8.70 7.52 6.93 6.30 5.35 4.21 2.44 1.44
400
9.80 8.39 7.72 7.01 6.02 4.57 2.52 1.45
400
8.74 7.52 6.97 6.34 5.35 4.21 2.48 1.46
400
5.75 5.00 4.69 4.41 3.82 3.15 2.17 1.53
400
6.97 5.91 5.35 4.84 4.06 3.19 1.89 1.63
400
6.02 5.08 4.61 4.25 3.78 3.07 2.09 1.77
400
5.67 4.84 4.53 4.25 3.74 3.11 2.13 1.84
400
6.02 5.20 4.80 4.57 4.09 3.39 2.40 1.87
400
6.10 5.12 4.65 4.33 3.82 3.07 2.09 1.92
400
10.35 8.58 7.76 7.01 6.02 4.49 2.52 1.93
400
6.97 5.87 5.20 4.76 4.09 3.15 1.89 1.94
400
6.97 5.87 5.28 4.80 4.06 3.19 1.85 1.99
400
10.00 8.46 7.80 7.17 6.14 4.84 2.80 2.01
400
10.00 8.39 7.76 7.13 6.14 4.80 2.80 2.07
400
10.20 8.46 7.60 6.89 5.91 4.41 2.44 2.09
400
9.96 8.35 7.72 7.13 6.10 4.80 2.80 2.19
400
10.35 8.19 7.40 6.69 5.67 4.33 2.44 2.96
400
10.28 8.11 7.32 6.57 5.51 4.21 2.32 2.96
400
6.89 6.02 5.63 5.08 4.57 3.74 2.40 0.72
300
253

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,153
18
20
1,351
23
19
1,345
22
19
1,085
15
15
1,109
21
13
1,135
21
13
1,039
16
14
1,107
22
13
1,826
47
12
1,150
32
16
1,327
53
12
1,800
50
11
1,756
51
10
1,326
51
12
813
19
13
1,123
33
16
1,172
31
16
1,022
19
12
1,008
19
12
829
19
14
1,014
19
11
701
23
12
682
22
13
1,138
47
12

Table A.1 (Cont'd)

File Title
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.16 4.69 4.41 3.98 3.50 2.83 1.65 0.85
300
9.25 8.19 7.40 6.34 5.39 3.90 2.01 0.89
300
5.20 4.69 4.37 3.90 3.46 2.80 1.65 0.96
300
5.20 4.69 4.29 3.94 3.50 2.80 1.65 0.98
300
6.02 5.12 4.72 4.09 3.62 2.76 1.54 0.98
300
9.37 8.31 7.48 6.42 5.47 3.90 2.01 0.99
300
6.77 5.94 5.47 4.92 4.41 3.58 2.20 1.00
300
4.65 4.13 3.86 3.43 3.07 2.48 1.46 1.04
300
6.06 5.20 4.76 4.13 3.62 2.80 1.54 1.14
300
4.65 4.17 3.86 3.46 3.07 2.52 1.50 1.20
300
6.77 5.91 5.47 4.96 4.41 3.62 2.20 1.29
300
6.02 5.16 4.76 4.13 3.58 2.80 1.50 1.46
300
8.03 6.38 5.91 5.24 4.65 3.70 2.24 2.05
300
4.65 4.17 3.82 3.43 3.07 2.56 1.46 2.05
300
8.11 6.42 5.98 5.28 4.69 3.78 2.28 2.26
300
8.07 6.38 5.94 5.24 4.69 3.74 2.24 2.37
300
7.72 6.65 6.10 5.39 4.72 3.70 2.20 0.56
300
6.69 6.06 5.63 5.08 4.45 3.54 2.09 0.60
300
5.28 4.72 4.45 4.02 3.62 2.87 1.69 0.62
300
6.65 6.02 5.59 5.04 4.41 3.46 2.05 0.63
300
11.93 10.47 9.53 8.19 7.01 5.12 2.72 0.64
300
7.48 6.61 6.18 5.55 4.92 3.94 2.36 0.66
300
6.65 6.06 5.59 5.04 4.41 3.43 2.05 0.70
300
11.93 10.51 9.53 8.23 7.01 5.16 2.72 0.70
300
254

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
2,155
26
21
714
16
17
1,886
36
19
1,951
33
20
1,146
37
21
695
16
17
1,146
41
13
2,041
42
22
1,166
35
21
2,021
46
21
1,201
39
13
1,221
32
22
644
50
13
2,189
37
22
641
51
12
650
49
13
848
35
14
1,414
25
15
2,062
27
19
1,372
25
16
550
14
12
1,193
28
13
1,329
27
15
558
13
12

Table A.1 (Cont'd)

File Title
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)
rigid-Su-M28-CS02041-08-23-2001-(2)

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
9.06 7.56 6.73 5.71 4.92 3.54 1.85 0.72
300
13.15 11.73 10.71 9.33 7.95 5.87 3.07 0.76
300
13.03 11.65 10.67 9.29 7.95 5.87 3.07 0.78
300
9.06 7.60 6.77 5.75 4.92 3.58 1.85 0.81
300
7.48 6.61 6.14 5.51 4.88 3.94 2.36 0.85
300
11.38 9.80 8.90 7.80 6.85 5.28 2.99 0.85
300
12.05 10.51 9.49 8.23 6.97 5.12 2.72 0.87
300
11.50 9.88 8.94 7.91 6.93 5.31 2.99 0.88
300
7.44 6.61 6.06 5.51 4.88 3.90 2.32 0.89
300
11.46 9.80 8.94 7.87 6.89 5.31 2.99 0.90
300
9.17 7.76 6.97 5.94 5.08 3.70 1.85 0.92
300
8.98 7.52 6.73 5.67 4.88 3.54 1.81 0.96
300
5.24 4.69 4.41 3.94 3.50 2.80 1.57 0.98
300
11.02 9.61 8.78 7.80 6.85 5.28 2.87 1.01
300
11.06 9.65 8.78 7.80 6.85 5.28 2.87 1.06
300
5.28 4.76 4.49 4.06 3.62 2.95 1.69 1.07
300
5.28 4.76 4.45 4.06 3.62 2.95 1.69 1.15
300
11.06 9.65 8.78 7.83 6.89 5.31 2.87 1.15
300
5.16 4.53 4.13 3.70 3.27 2.64 1.57 1.15
300
8.86 7.28 6.57 5.79 5.04 3.86 2.20 1.30
300
7.76 6.73 6.18 5.43 4.76 3.82 2.20 1.31
300
8.86 7.24 6.57 5.79 5.04 3.86 2.20 1.38
300
6.69 5.87 5.31 4.80 4.17 3.27 1.77 1.41
300
8.90 7.28 6.57 5.75 5.08 3.86 2.20 1.49
300
255

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
588
24
17
559
10
11
580
10
11
605
23
17
1,155
31
13
593
20
10
517
15
11
592
19
10
1,165
29
13
595
20
10
658
19
17
616
22
17
2,045
21
22
748
15
12
741
15
12
2,280
19
21
2,255
20
21
764
14
12
1,449
49
19
627
33
14
921
32
14
632
33
14
1,259
23
18
638
32
14

Table A.1 (Cont'd)
Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
File Title
Layer
(%)
0
8
12
18
24
36
60
(in)
rigid-Su-M28-CS02041-08-23-2001-(2) 7.72 6.69 6.06 5.35 4.76 3.82 2.20 1.60
300
rigid-Su-M28-CS02041-08-23-2001-(2) 6.65 5.83 5.35 4.72 4.13 3.31 1.77 1.79
300
rigid-Su-M28-CS02041-08-23-2001-(2) 5.20 4.53 4.17 3.70 3.27 2.72 1.54 2.19
300
rigid-Su-M28-CS17062-05-08-2001
7.17 6.06 5.55 4.88 4.25 3.27 2.01 0.43
400
rigid-Su-M28-CS17062-05-08-2001
7.17 6.06 5.59 4.88 4.25 3.31 2.01 0.48
400
rigid-Su-M28-CS17062-05-08-2001
8.03 6.89 6.26 5.47 4.80 3.74 2.24 0.49
400
rigid-Su-M28-CS17062-05-08-2001
7.13 6.02 5.55 4.80 4.25 3.27 2.01 0.52
400
rigid-Su-M28-CS17062-05-08-2001
9.13 7.56 6.89 5.98 5.28 4.13 2.52 0.53
400
rigid-Su-M28-CS17062-05-08-2001
8.39 7.09 6.50 5.63 4.88 3.62 2.13 0.56
400
rigid-Su-M28-CS17062-05-08-2001
8.19 7.09 6.54 5.87 5.24 4.13 2.60 0.61
400
rigid-Su-M28-CS17062-05-08-2001
8.39 7.20 6.61 5.87 5.20 4.09 2.52 0.62
400
rigid-Su-M28-CS17062-05-08-2001
7.83 6.54 6.02 5.20 4.53 3.46 2.05 0.62
400
rigid-Su-M28-CS17062-05-08-2001
9.21 7.80 7.13 6.30 5.51 4.25 2.56 0.63
400
rigid-Su-M28-CS17062-05-08-2001
8.35 7.05 6.54 5.63 4.88 3.66 2.13 0.66
400
rigid-Su-M28-CS17062-05-08-2001
7.80 6.54 6.02 5.24 4.57 3.46 2.05 0.71
400
rigid-Su-M28-CS17062-05-08-2001
8.19 7.05 6.54 5.79 5.20 4.13 2.56 0.75
400
rigid-Su-M28-CS17062-05-08-2001
8.03 6.89 6.30 5.51 4.88 3.78 2.28 0.75
400
rigid-Su-M28-CS17062-05-08-2001
7.87 6.61 6.06 5.28 4.61 3.50 2.05 0.76
400
rigid-Su-M28-CS17062-05-08-2001
8.19 7.09 6.54 5.79 5.24 4.13 2.56 0.80
400
rigid-Su-M28-CS17062-05-08-2001
8.23 7.40 6.93 6.26 5.71 4.72 3.03 0.83
400
rigid-Su-M28-CS17062-05-08-2001
8.03 6.85 6.26 5.51 4.84 3.74 2.20 0.84
400
rigid-Su-M28-CS17062-05-08-2001
7.01 5.98 5.55 4.92 4.37 3.43 2.09 0.89
400
rigid-Su-M28-CS17062-05-08-2001
10.12 8.82 8.23 7.28 6.57 5.28 3.27 0.89
400
rigid-Su-M28-CS17062-05-08-2001
8.86 7.36 6.69 5.79 5.08 3.94 2.32 0.89
400
256

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
920
34
14
1,288
22
18
1,560
43
19
960
101
18
987
100
18
925
84
16
964
104
18
613
93
14
912
63
17
1,019
94
13
920
89
13
888
83
17
789
73
14
969
61
17
941
79
17
1,014
94
14
937
87
15
963
76
17
1,038
92
14
1,434
94
11
1,021
75
16
1,257
94
17
906
73
11
716
79
15

Table A.1 (Cont'd)

File Title
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
8.35 7.01 6.50 5.63 4.84 3.66 2.13 0.91
400
7.05 6.02 5.51 4.88 4.41 3.58 2.24 0.95
400
7.99 6.54 5.94 5.12 4.49 3.43 2.01 0.98
400
7.68 6.54 6.02 5.35 4.61 3.46 2.01 0.98
400
6.81 6.06 5.59 5.08 4.53 3.66 2.24 0.99
400
7.13 6.42 5.98 5.47 4.84 3.86 2.32 1.00
400
8.07 6.89 6.38 5.63 4.96 3.90 2.32 1.00
400
7.64 6.69 6.22 5.51 5.00 4.02 2.48 1.01
400
8.23 6.77 6.18 5.28 4.61 3.39 1.93 1.03
400
7.91 6.77 6.14 5.43 4.92 3.94 2.44 1.03
400
8.70 7.32 6.69 5.83 5.12 3.94 2.28 1.07
400
7.60 6.54 6.02 5.31 4.69 3.70 2.17 1.13
400
7.95 6.77 6.30 5.55 4.88 3.78 2.20 1.16
400
10.28 8.74 7.99 7.01 6.22 4.92 2.91 1.17
400
9.29 7.99 7.28 6.50 5.79 4.53 2.68 1.26
400
9.13 7.68 6.97 6.06 5.24 3.90 2.13 1.26
400
11.06 9.37 8.58 7.52 6.54 4.92 2.72 1.28
400
8.94 7.40 6.69 5.71 5.00 3.70 2.05 1.29
400
7.52 6.50 5.94 5.24 4.61 3.46 1.89 1.32
400
7.64 6.54 5.98 5.31 4.72 3.62 2.09 1.35
400
6.65 5.71 5.28 4.76 4.37 3.58 2.28 1.35
400
6.50 5.47 5.04 4.41 3.94 3.03 1.77 1.38
400
8.66 7.56 6.97 6.14 5.39 4.09 2.17 1.42
400
10.94 9.25 8.50 7.40 6.50 4.88 2.68 1.46
400
257

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
880
65
17
907
138
15
766
87
18
1,238
55
17
1,777
81
15
1,983
54
15
1,081
75
15
1,269
91
14
862
65
18
817
114
14
861
66
15
1,212
76
16
1,150
68
16
759
66
12
969
62
13
933
44
16
859
34
13
840
54
17
1,551
39
19
1,260
62
16
1,242
146
15
1,353
89
20
1,527
23
16
885
33
13

Table A.1 (Cont'd)

File Title
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
9.49 8.03 7.32 6.34 5.59 4.25 2.36 1.47
400
8.27 7.13 6.57 5.71 5.00 3.78 2.01 1.48
400
9.96 8.39 7.68 6.69 5.75 4.33 2.32 1.51
400
7.28 6.14 5.59 4.88 4.21 3.23 1.77 1.54
400
7.36 6.50 6.02 5.43 4.88 3.94 2.32 1.56
400
7.68 6.65 6.14 5.47 4.88 3.74 2.09 1.58
400
9.41 8.11 7.44 6.69 5.91 4.69 2.72 1.59
400
10.71 9.13 8.31 7.28 6.42 4.92 2.72 1.63
400
9.45 7.80 7.05 6.06 5.28 3.98 2.17 1.68
400
7.64 6.61 6.14 5.47 4.84 3.74 2.05 1.69
400
7.68 6.61 6.18 5.47 4.88 3.74 2.05 1.76
400
7.83 6.34 5.79 4.92 4.21 3.11 1.65 1.76
400
13.94 11.89 10.87 9.57 8.39 6.38 3.43 1.78
400
8.46 7.13 6.50 5.63 4.92 3.66 1.93 1.78
400
7.56 6.46 5.94 5.28 4.57 3.46 1.81 1.83
400
8.62 7.36 6.69 5.83 5.12 3.94 2.13 1.84
400
11.22 9.37 8.46 7.36 6.38 4.80 2.56 1.84
400
6.50 5.55 5.12 4.49 4.02 3.11 1.73 1.89
400
7.48 6.42 5.87 5.20 4.53 3.46 1.81 1.95
400
8.90 7.56 6.89 6.02 5.20 3.86 1.93 1.96
400
8.70 7.52 6.93 6.10 5.39 4.06 2.05 1.97
400
9.37 7.99 7.40 6.54 5.75 4.33 2.24 2.00
400
9.41 8.11 7.44 6.57 5.83 4.49 2.40 2.05
400
9.33 8.07 7.36 6.50 5.75 4.41 2.28 2.21
400
258

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
935
47
15
1,422
32
18
939
34
15
1,169
61
20
1,761
61
15
1,647
40
17
1,117
53
13
924
37
13
786
51
16
1,825
32
17
1,792
32
17
955
54
21
785
22
10
1,138
39
18
1,689
29
20
1,147
42
16
752
34
13
1,683
62
20
1,735
29
20
1,350
20
18
1,691
14
18
1,499
17
16
1,266
30
14
1,462
20
16

Table A.1 (Cont'd)

File Title
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-Su-M28-CS17062-05-08-2001
rigid-U-I69-CS19043-06-25-2001
rigid-U-I69-CS19043-06-25-2001
rigid-U-I69-CS19043-06-25-2001
rigid-U-I69-CS19043-06-25-2001
rigid-U-I69-CS19043-06-25-2001
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
9.29 7.99 7.32 6.46 5.71 4.37 2.24 2.28
400
10.79 8.98 8.07 6.93 5.94 4.29 2.01 2.45
400
11.30 9.06 8.27 7.01 6.06 4.41 2.24 2.46
400
4.84 4.29 3.94 3.54 3.15 2.56 1.54 1.38
700
8.43 7.24 6.57 5.79 5.08 3.82 2.05 1.49
700
8.27 7.13 6.50 5.67 4.96 3.78 2.01 1.57
700
4.80 4.29 3.94 3.54 3.15 2.60 1.54 1.74
700
8.27 7.13 6.46 5.67 4.96 3.86 2.01 2.19
700
4.09 3.66 3.39 3.07 2.76 2.20 1.34 0.88
700
4.49 3.98 3.66 3.31 2.99 2.36 1.46 0.96
700
3.94 3.54 3.27 2.99 2.68 2.17 1.34 1.00
700
4.49 3.98 3.74 3.43 3.07 2.52 1.61 1.01
700
4.57 4.02 3.74 3.39 2.99 2.40 1.46 1.03
700
4.45 3.94 3.66 3.31 2.95 2.36 1.42 1.06
700
4.21 3.70 3.46 3.11 2.76 2.17 1.26 1.09
700
3.98 3.54 3.27 2.95 2.68 2.13 1.30 1.13
700
4.76 4.21 3.94 3.58 3.23 2.56 1.54 1.13
700
4.96 4.29 3.98 3.58 3.19 2.52 1.54 1.14
700
4.65 4.09 3.82 3.46 3.11 2.52 1.57 1.15
700
4.41 3.90 3.66 3.31 2.95 2.40 1.46 1.20
700
4.65 4.09 3.78 3.39 3.03 2.40 1.42 1.20
700
5.55 4.80 4.45 4.06 3.62 2.95 1.89 1.21
700
4.96 4.25 3.86 3.39 2.95 2.20 1.18 1.26
700
4.65 4.13 3.86 3.54 3.19 2.56 1.54 1.28
700
259

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,536
18
16
976
15
17
712
31
15
2,199
50
25
1,115
18
19
1,144
18
20
2,421
44
25
1,204
17
20
2,894
47
29
2,370
55
26
3,136
53
29
2,704
61
23
2,349
50
26
2,578
46
27
2,833
35
32
2,914
53
29
2,704
34
26
1,949
54
24
2,436
54
24
2,791
47
27
2,350
41
27
1,657
70
20
1,802
32
33
2,915
32
25

Table A.1 (Cont'd)

File Title
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.72 4.21 3.94 3.54 3.19 2.60 1.57 1.28
700
10.04 8.62 7.87 7.09 6.22 4.76 2.76 1.29
700
5.51 4.72 4.41 3.98 3.54 2.87 1.81 1.31
700
4.61 4.06 3.74 3.35 2.99 2.32 1.30 1.32
700
5.35 4.69 4.33 3.90 3.50 2.80 1.69 1.33
700
4.25 3.78 3.50 3.19 2.83 2.28 1.34 1.33
700
5.31 4.69 4.33 3.94 3.54 2.80 1.65 1.35
700
4.37 3.86 3.62 3.27 2.95 2.40 1.46 1.36
700
6.46 5.51 5.04 4.45 3.86 2.91 1.57 1.39
700
6.26 5.28 4.80 4.21 3.62 2.68 1.42 1.39
700
8.66 7.44 6.81 6.06 5.31 4.13 2.36 1.40
700
4.57 4.02 3.70 3.31 2.91 2.28 1.26 1.40
700
7.32 6.34 5.79 5.24 4.65 3.62 2.13 1.41
700
6.61 5.67 5.20 4.65 4.06 3.19 1.85 1.43
700
5.00 4.29 3.98 3.50 3.15 2.40 1.38 1.43
700
8.11 6.93 6.30 5.63 4.88 3.66 1.97 1.49
700
6.50 5.51 5.04 4.45 3.86 2.91 1.57 1.52
700
6.02 5.16 4.84 4.37 3.86 3.11 1.89 1.52
700
4.25 3.74 3.46 3.15 2.83 2.24 1.30 1.53
700
6.69 5.75 5.20 4.69 4.13 3.23 1.89 1.57
700
7.56 6.34 5.75 5.12 4.45 3.39 1.93 1.59
700
5.04 4.29 3.98 3.50 3.15 2.40 1.38 1.59
700
7.48 6.50 5.98 5.39 4.76 3.70 2.05 1.59
700
7.72 6.57 5.98 5.31 4.65 3.50 1.89 1.64
700
260

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
2,731
41
25
911
21
14
1,652
65
21
2,545
28
31
1,985
44
22
2,995
35
30
2,313
30
24
2,861
47
26
1,415
24
25
1,361
26
28
1,041
24
16
2,562
28
33
1,330
30
18
1,359
36
20
1,940
39
28
1,117
19
20
1,400
25
25
1,652
45
20
3,037
32
31
1,328
37
20
1,060
31
19
1,886
40
28
1,515
18
20
1,207
20
21

Table A.1 (Cont'd)

File Title
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19043-05-14-2002
rigid-U-I69-CS19042-09-18-1999
rigid-U-I69-CS19042-09-18-1999
rigid-U-I69-CS19042-09-18-1999
rigid-U-I69-CS19042-09-18-1999

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
5.16 4.41 4.09 3.58 3.23 2.48 1.42 1.64
700
9.21 7.87 7.13 6.38 5.67 4.33 2.48 1.64
700
9.06 7.76 7.01 6.26 5.55 4.21 2.36 1.67
700
7.68 6.54 5.94 5.24 4.57 3.46 1.85 1.69
700
7.64 6.50 5.94 5.28 4.57 3.58 2.01 1.71
700
7.56 6.42 5.91 5.24 4.53 3.54 1.97 1.71
700
5.28 4.57 4.21 3.78 3.39 2.72 1.61 1.76
700
6.65 5.67 5.12 4.57 3.98 3.07 1.69 1.83
700
6.26 5.24 4.76 4.17 3.62 2.68 1.38 1.90
700
6.93 5.79 5.28 4.65 4.02 3.15 1.77 1.93
700
6.34 5.35 4.84 4.33 3.78 2.87 1.54 2.06
700
4.53 3.78 3.43 3.07 2.68 2.05 1.14 2.06
700
6.93 5.94 5.43 4.88 4.33 3.35 1.81 2.10
700
4.84 4.06 3.70 3.27 2.87 2.17 1.14 2.19
700
6.81 5.75 5.24 4.69 4.09 3.19 1.73 2.25
700
6.61 5.59 5.08 4.57 3.98 3.11 1.69 2.28
700
6.93 5.79 5.24 4.61 4.02 3.15 1.73 2.31
700
6.22 5.24 4.69 4.21 3.70 2.83 1.54 2.33
700
4.49 3.74 3.43 2.99 2.64 2.01 1.06 2.36
700
6.18 5.20 4.65 4.17 3.70 2.83 1.54 2.51
700
2.51 2.08 1.89 1.62 1.38 1.03 0.63 0.54
700
3.29 2.77 2.51 2.18 1.85 1.32 0.71 0.74
700
8.22 7.10 6.63 5.88 5.11 3.96 2.35 0.79
700
8.38 7.18 6.71 5.91 5.14 3.99 2.39 0.87
700
261

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,819
39
27
988
23
15
1,014
21
16
1,185
21
21
1,151
29
19
1,191
27
19
1,935
45
23
1,363
29
23
1,412
24
29
1,131
37
21
1,451
26
25
1,885
46
33
1,620
19
23
1,983
30
35
1,373
26
22
1,445
27
23
1,160
34
22
1,431
30
25
1,994
37
36
1,457
31
25
1,064
69
29
1,109
27
27
1,804
46
26
1,674
49
26

Table A.1 (Cont'd)

File Title
rigid-U-I69-CS19042-09-18-1999
rigid-U-I69-CS19042-09-18-1999
rigid-U-I69-CS19042-09-18-1999
rigid-U-I69-CS19042-09-18-1999
rigid-U-I69-CS19042-09-18-1999
rigid-U-I69-CS19042-09-18-1999
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
8.33 7.12 6.63 5.84 5.12 3.96 2.37 0.87
700
10.26 8.78 8.09 7.17 6.12 4.67 2.63 1.03
700
10.17 8.70 7.99 7.04 6.03 4.55 2.47 1.12
700
10.10 8.64 7.84 6.93 6.03 4.55 2.53 1.22
700
3.40 2.80 2.57 2.18 1.83 1.36 0.71 1.57
700
10.24 8.64 7.99 6.80 6.02 4.57 2.53 1.62
700
5.14 4.92 4.54 4.28 3.94 3.24 2.08 0.96
225
4.68 4.32 4.13 3.93 3.71 3.15 2.13 1.06
225
4.36 4.01 3.85 3.65 3.45 2.95 2.01 1.08
225
5.14 4.94 4.55 4.32 3.97 3.24 2.09 1.10
225
4.67 4.35 4.13 3.98 3.74 3.23 2.21 1.14
225
4.41 4.04 3.87 3.70 3.46 2.97 2.00 1.22
225
4.40 4.06 3.88 3.69 3.51 2.98 2.01 1.24
225
4.41 3.97 3.77 3.62 3.39 2.92 2.09 1.24
225
5.39 4.73 4.43 4.09 3.80 3.06 1.97 1.24
225
4.45 4.11 3.93 3.79 3.59 3.13 2.20 1.29
225
4.47 4.12 3.93 3.78 3.53 3.04 2.02 1.32
225
4.37 4.05 3.87 3.80 3.56 3.09 2.19 1.36
225
4.78 4.45 4.20 4.08 3.85 3.30 2.26 1.37
225
4.26 3.94 3.76 3.60 3.43 2.96 2.02 1.39
225
4.38 4.00 3.83 3.66 3.45 2.97 2.01 1.41
225
4.45 4.10 3.95 3.81 3.61 3.17 2.21 1.42
225
4.60 4.19 4.03 3.83 3.61 3.07 2.02 1.42
225
4.31 3.95 3.74 3.55 3.38 2.90 1.98 1.43
225
262

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,651
52
26
1,387
32
24
1,431
27
26
1,406
31
25
1,010
28
26
1,300
34
25
3,209
23
13
4,434
33
12
4,585
47
12
3,309
19
14
4,887
29
11
4,579
41
13
4,983
28
13
2,818
146
10
1,731
76
13
4,988
59
10
5,080
18
13
5,719
39
11
4,944
23
11
5,529
31
12
4,538
51
12
5,796
33
11
4,746
18
14
3,963
78
12

Table A.1 (Cont'd)

File Title
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58151-03-31-2008
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.86 4.75 4.51 4.18 3.82 3.10 2.04 1.44
225
4.73 4.36 4.15 3.98 3.77 3.22 2.14 1.45
225
4.43 4.05 3.87 3.71 3.53 3.01 2.05 1.51
225
4.48 4.09 3.91 3.80 3.53 3.05 2.07 1.51
225
4.36 3.94 3.80 3.63 3.42 2.87 1.88 1.59
225
4.39 4.01 3.78 3.64 3.44 2.92 1.97 1.60
225
4.47 4.09 3.85 3.73 3.53 3.00 2.07 1.60
225
4.55 4.14 3.93 3.74 3.59 3.02 2.07 1.61
225
4.17 3.77 3.62 3.47 3.29 2.80 1.90 1.65
225
4.67 4.27 4.08 3.93 3.72 3.21 2.15 1.68
225
4.40 4.03 3.83 3.73 3.55 3.00 2.07 1.71
225
4.37 4.06 3.85 3.74 3.61 3.12 2.18 1.72
225
4.28 3.94 3.74 3.57 3.45 2.97 2.03 1.76
225
4.15 3.76 3.59 3.43 3.27 2.81 1.90 1.78
225
4.45 4.06 3.88 3.77 3.59 3.10 2.14 1.79
225
4.34 3.99 3.76 3.68 3.48 3.00 2.06 1.80
225
5.34 4.67 4.32 4.03 3.74 3.07 1.93 1.81
225
4.18 3.79 3.59 3.44 3.30 2.78 1.90 1.81
225
4.30 3.98 3.74 3.64 3.48 2.98 2.01 1.86
225
4.23 3.89 3.66 3.53 3.42 2.85 1.95 1.93
225
4.32 3.93 3.73 3.64 3.45 3.00 2.07 1.95
225
4.35 3.98 3.75 3.68 3.49 3.02 2.09 1.96
225
3.86 3.31 3.17 2.97 2.75 2.33 1.62 1.66
500
8.57 7.12 6.67 5.94 5.27 4.18 2.46 1.72
500
263

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
3,640
15
15
5,022
12
13
4,775
42
12
4,779
39
12
4,971
14
15
4,197
53
12
4,071
71
11
3,868
68
11
4,749
52
13
5,206
16
13
5,082
38
12
6,468
17
12
5,253
43
12
4,741
57
13
5,440
34
11
5,233
40
12
1,695
81
13
4,325
68
12
5,993
12
14
5,141
36
13
5,170
53
11
5,261
48
11
2,347
143
20
825
31
14

Table A.1 (Cont'd)

File Title
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-I75-CS58152-10-06-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
8.55 7.10 6.64 5.93 5.25 4.16 2.43 1.78
500
8.53 7.04 6.60 5.87 5.21 4.10 2.39 1.83
500
7.68 6.41 6.03 5.47 4.89 3.96 2.40 1.94
500
8.50 7.03 6.63 5.90 5.24 4.17 2.43 1.96
500
10.08 8.35 7.79 7.08 6.24 5.00 2.96 2.00
500
9.97 8.22 7.68 6.93 6.17 4.92 2.92 2.04
500
10.10 8.34 7.77 7.06 6.25 5.00 2.96 2.09
500
7.79 6.45 6.03 5.49 4.86 3.98 2.41 2.12
500
9.04 7.31 6.89 6.15 5.47 4.29 2.54 2.14
500
9.04 7.30 6.87 6.16 5.44 4.27 2.52 2.16
500
9.00 7.26 6.86 6.16 5.44 4.27 2.51 2.27
500
10.56 8.91 8.27 7.52 6.72 5.33 2.95 2.30
500
7.09 5.73 5.33 4.84 4.24 3.39 2.00 2.35
500
7.14 5.76 5.37 4.84 4.27 3.42 2.02 2.36
500
10.65 9.00 8.36 7.65 6.78 5.43 2.99 2.39
500
7.19 5.77 5.38 4.84 4.25 3.40 2.00 2.39
500
10.61 8.91 8.31 7.52 6.69 5.33 2.92 2.40
500
5.08 4.10 3.80 3.43 3.02 2.36 1.35 2.43
500
5.11 4.12 3.87 3.45 3.04 2.42 1.34 2.82
500
3.76 3.32 3.08 2.73 2.40 1.86 1.06 0.39
225
4.48 3.90 3.57 3.22 2.80 2.18 1.29 0.50
225
4.58 3.91 3.61 3.24 2.82 2.20 1.29 0.63
225
4.32 3.71 3.37 3.01 2.59 2.00 1.14 0.64
225
4.29 3.69 3.37 3.00 2.58 1.98 1.18 0.65
225
264

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
848
30
15
830
30
15
1,006
40
15
865
30
15
740
27
12
726
29
12
725
28
12
932
43
15
733
33
14
738
33
14
752
32
14
910
13
13
905
46
18
886
47
17
932
12
13
845
48
17
892
13
13
1,295
54
26
1,406
46
27
2,090
59
26
1,514
71
20
1,416
72
20
1,428
69
23
1,356
82
22

Table A.1 (Cont'd)

File Title
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
4.47 3.85 3.54 3.21 2.78 2.18 1.30 0.80
225
4.30 3.66 3.40 3.02 2.60 1.99 1.20 0.86
225
7.40 6.24 5.71 5.04 4.38 3.26 1.72 0.90
225
7.39 6.21 5.71 5.01 4.37 3.25 1.68 1.10
225
3.52 3.00 2.79 2.55 2.28 1.82 1.11 1.16
225
3.50 3.00 2.79 2.57 2.30 1.85 1.13 1.29
225
7.37 6.15 5.69 5.00 4.36 3.21 1.61 1.37
225
3.79 3.17 2.97 2.72 2.43 1.93 1.20 1.38
225
5.58 4.36 3.93 3.44 2.89 2.12 1.13 1.47
225
5.87 4.70 4.25 3.79 3.23 2.45 1.34 1.59
225
6.54 5.29 4.90 4.35 3.81 2.97 1.69 1.62
225
5.93 4.74 4.31 3.80 3.28 2.51 1.36 1.75
225
6.53 5.28 4.86 4.32 3.76 2.92 1.62 1.76
225
7.19 5.59 5.15 4.43 3.79 2.74 1.42 1.79
225
8.14 6.51 5.81 5.08 4.33 3.09 1.50 1.80
225
7.18 5.59 5.18 4.47 3.82 2.74 1.41 1.89
225
7.63 6.12 5.62 4.91 4.20 3.10 1.54 1.91
225
7.54 5.99 5.35 4.70 3.99 2.87 1.41 1.91
225
7.19 5.65 5.18 4.49 3.81 2.76 1.37 1.91
225
9.13 7.31 6.79 5.92 5.11 3.73 1.87 1.92
225
5.92 4.75 4.30 3.82 3.30 2.46 1.29 1.92
225
7.58 6.11 5.59 4.90 4.19 3.12 1.55 1.95
225
5.56 4.34 3.93 3.44 2.92 2.12 1.08 1.95
225
5.72 4.56 4.15 3.66 3.18 2.35 1.23 1.96
225
265

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
1,487
73
20
1,367
84
22
912
29
16
938
26
16
2,056
110
23
2,198
108
22
987
22
18
1,758
118
21
790
59
23
838
59
19
832
59
15
851
59
19
841
55
16
657
41
18
660
27
18
703
38
19
762
29
17
691
31
19
721
34
19
654
24
14
909
49
20
786
29
17
876
50
24
936
50
21

Table A.1 (Cont'd)

File Title
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.05 5.57 5.16 4.45 3.79 2.74 1.33 2.00
225
7.45 5.94 5.35 4.68 4.05 2.95 1.48 2.00
225
7.62 6.15 5.60 4.92 4.23 3.08 1.49 2.00
225
7.58 5.99 5.47 4.79 4.09 3.01 1.52 2.02
225
7.07 5.59 4.98 4.33 3.67 2.60 1.21 2.02
225
7.50 5.97 5.43 4.77 4.03 2.96 1.45 2.03
225
7.43 5.66 5.02 4.42 3.75 2.66 1.26 2.03
225
8.13 6.51 5.80 5.08 4.33 3.10 1.47 2.03
225
9.28 7.44 6.91 6.06 5.21 3.84 1.91 2.05
225
7.51 5.94 5.33 4.70 4.04 2.95 1.50 2.07
225
5.76 4.55 4.09 3.57 3.07 2.26 1.14 2.08
225
7.52 5.99 5.40 4.73 4.09 2.97 1.45 2.08
225
7.42 5.67 5.03 4.44 3.74 2.66 1.24 2.12
225
7.62 6.02 5.50 4.83 4.08 3.01 1.49 2.13
225
5.61 4.35 3.93 3.42 2.89 2.11 1.03 2.13
225
7.11 5.63 5.24 4.57 3.86 2.82 1.38 2.15
225
5.79 4.62 4.20 3.73 3.23 2.44 1.28 2.16
225
8.28 6.52 5.81 5.14 4.39 3.11 1.51 2.22
225
7.57 5.96 5.32 4.58 3.80 2.62 1.05 2.22
225
7.03 5.45 4.88 4.25 3.61 2.51 0.97 2.23
225
6.22 4.83 4.31 3.76 3.23 2.31 1.14 2.24
225
9.87 7.75 7.15 6.23 5.26 3.73 1.74 2.24
225
7.03 5.48 4.94 4.24 3.57 2.49 0.96 2.25
225
6.15 4.85 4.33 3.78 3.23 2.31 1.06 2.26
225
266

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
810
29
20
733
33
18
806
25
18
710
33
17
622
17
17
754
29
19
706
22
19
680
24
18
679
22
14
704
35
18
880
48
23
821
29
20
756
28
22
730
31
18
671
31
19
696
22
19
948
51
20
710
21
19
709
20
15
703
38
21
750
30
19
594
18
16
940
51
21
690
23
18

Table A.1 (Cont'd)

File Title
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006
rigid-U-US23-CS58034-09-14-2006

Deflection (in mills) at the Specified Distance RMS Depth
(in inch) from the Center of the Loaded Area Error to Stiff
Layer
(%)
0
8
12
18
24
36
60
(in)
7.46 5.67 5.05 4.40 3.74 2.63 1.23 2.29
225
5.60 4.32 3.89 3.44 2.90 2.10 1.05 2.30
225
5.77 4.51 4.07 3.61 3.10 2.32 1.18 2.33
225
8.21 6.45 5.95 5.14 4.37 3.09 1.43 2.33
225
7.02 5.34 4.88 4.26 3.63 2.63 1.35 2.34
225
5.59 4.35 3.90 3.38 2.94 2.12 1.04 2.35
225
7.15 5.58 4.99 4.35 3.68 2.58 1.20 2.35
225
7.02 5.50 4.93 4.29 3.60 2.55 1.16 2.36
225
9.87 7.71 7.13 6.17 5.23 3.73 1.73 2.39
225
7.03 5.41 4.84 4.25 3.55 2.45 0.95 2.40
225
6.31 4.87 4.35 3.81 3.27 2.33 1.15 2.41
225
9.29 7.44 6.94 6.06 5.25 3.85 1.88 2.47
225
6.93 5.33 4.88 4.22 3.61 2.55 1.27 2.53
225
7.58 5.93 5.29 4.64 3.84 2.66 1.07 2.58
225
5.79 4.58 4.18 3.73 3.22 2.41 1.27 2.59
225
9.51 7.54 6.96 5.97 5.11 3.59 1.65 2.67
225
7.67 6.01 5.40 4.74 4.02 2.88 1.41 2.86
225
8.30 6.61 5.97 5.25 4.41 3.22 1.51 2.93
225
8.30 6.55 5.95 5.21 4.44 3.24 1.56 2.97
225

267

Backcalculated Resilient
Modulus (ksi)
RoadPCC Granular
bed
738
28
23
644
26
18
794
41
23
791
25
24
883
46
26
651
27
17
646
23
19
628
24
19
581
18
16
662
43
19
854
49
25
772
42
23
884
46
25
893
50
22
885
32
25
692
20
19
644
31
21
653
33
21
666
31
21

APPENDIX B

268

Table B.1 Backcalculated Pavement Layer Moduli for Flexible Pavement (Two – Layer System)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002

8

12

18

24

36

60

RMS
Error
(%)

9.30
6.03
5.84
7.44
6.07
7.87
6.15
6.78
5.91
6.19
5.88
7.55
7.51
6.06
6.73
7.15
7.14
6.96
6.30
6.33
6.51
8.45
8.94
11.34

7.18
5.43
5.24
6.56
5.40
6.66
5.50
5.94
5.30
5.56
5.40
6.55
6.66
5.39
5.98
6.31
6.31
6.21
5.64
5.71
5.87
7.48
7.89
9.36

6.25
5.00
4.76
5.91
4.87
5.90
5.03
5.35
4.83
5.09
5.01
5.97
6.06
4.89
5.40
5.64
5.70
5.67
5.16
5.25
5.35
6.82
7.14
8.03

5.21
4.45
4.20
5.09
4.22
4.89
4.38
4.60
4.26
4.42
4.48
5.23
5.29
4.25
4.68
4.83
4.91
4.93
4.50
4.68
4.73
6.03
6.18
6.42

4.38
3.85
3.58
4.33
3.57
4.07
3.81
3.89
3.71
3.82
3.91
4.52
4.60
3.65
3.95
4.05
4.21
4.24
3.88
4.12
4.08
5.31
5.33
5.20

3.15
2.92
2.65
3.15
2.59
2.84
2.86
2.71
2.81
2.81
3.03
3.45
3.36
2.69
2.80
2.85
3.03
3.11
2.88
3.15
3.06
3.91
3.90
3.44

1.89
1.73
1.46
1.82
1.45
1.66
1.64
1.37
1.57
1.55
1.77
2.02
1.85
1.51
1.30
1.47
1.75
1.78
1.64
1.86
1.73
2.36
2.21
1.81

1.29
0.33
0.52
0.28
0.37
0.63
0.41
0.52
0.82
0.24
0.36
0.94
0.62
0.34
0.90
0.40
0.40
0.18
0.16
0.50
0.41
0.81
0.40
0.43

269

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

539
2,500
2,488
1,446
1,953
935
2,221
1,853
2,644
2,328
3,181
1,567
1,897
2,129
2,272
1,641
1,561
1,861
2,198
2,584
2,299
1,547
1,353
568

Granular Roadbed

50
38
31
36
36
41
36
22
31
28
29
40
25
36
14
24
35
32
33
34
29
32
26
24

20
22
27
21
27
23
23
28
25
25
23
19
21
25
32
26
22
22
24
21
23
16
17
20

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001

8

12

18

24

36

60

RMS
Error
(%)

10.73
10.81
10.33
8.71
10.01
10.51
7.05
7.64
8.37
7.90
8.13
8.40
10.37
6.30
6.32
8.08
7.91
9.03
9.67
6.92
6.43
10.59
12.52
14.16

8.75
8.86
8.69
7.86
8.34
8.02
6.13
6.72
7.00
6.86
7.10
7.26
8.75
5.55
5.69
7.12
6.58
7.99
8.34
6.10
5.54
9.21
9.56
10.68

7.52
7.51
7.50
7.15
7.40
6.81
5.51
6.05
6.07
6.07
6.35
6.47
7.76
5.01
5.16
6.48
5.97
7.17
7.44
5.43
4.93
8.18
7.69
8.46

6.03
6.01
6.10
6.19
6.30
5.47
4.73
5.21
4.95
5.05
5.38
5.50
6.57
4.36
4.52
5.62
5.04
6.10
6.31
4.60
4.21
6.85
5.56
6.10

4.91
4.84
4.97
5.30
5.28
4.39
4.00
4.41
3.98
4.18
4.53
4.63
5.47
3.78
3.93
4.83
4.20
5.19
5.30
3.85
3.57
5.68
4.25
4.65

3.30
3.22
3.32
3.79
3.69
2.82
2.84
3.20
2.60
2.82
3.14
3.29
3.65
2.83
2.91
3.56
2.99
3.70
3.69
2.76
2.53
3.83
2.77
2.96

1.77
1.66
1.72
1.96
1.81
1.45
1.56
1.84
1.29
1.44
1.68
1.80
1.90
1.73
1.75
2.00
1.64
2.09
1.97
1.55
1.45
1.86
1.62
1.62

0.46
0.78
0.51
0.27
1.83
1.72
0.36
0.23
0.35
0.32
0.30
0.45
0.92
0.28
0.47
0.43
0.94
0.41
0.41
0.53
0.44
0.40
1.56
1.29

270

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

574
572
713
1,692
1,059
534
1,533
1,390
918
1,204
1,282
1,189
908
1,679
1,964
1,533
1,139
1,160
1,037
1,381
1,440
993
290
267

Granular Roadbed

27
25
23
15
19
27
32
34
25
24
25
28
20
52
42
27
33
27
22
36
43
15
30
24

20
21
21
20
20
24
24
21
28
26
22
21
20
22
22
19
22
18
19
24
26
20
26
25

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001

8

12

18

24

36

60

RMS
Error
(%)

14.32
11.80
12.57
13.28
12.30
11.88
11.93
11.98
13.00
13.15
13.18
13.27
13.57
13.45
12.98
12.44
12.42
13.00
14.85
16.42
13.39
17.09
13.23
14.37

10.88
9.06
9.67
10.15
9.26
8.79
8.95
8.65
9.57
9.78
10.48
10.29
10.16
9.86
9.74
9.45
9.34
9.78
11.27
12.72
10.13
12.65
9.97
10.43

8.49
7.20
7.71
7.92
7.27
6.78
7.04
6.61
7.30
7.61
8.40
8.22
8.03
7.77
7.68
7.45
7.43
7.80
8.93
10.03
7.98
10.15
7.83
8.00

5.92
5.24
5.62
5.56
5.27
4.81
4.96
4.65
5.15
5.39
6.23
6.07
5.93
5.69
5.70
5.60
5.50
5.76
6.52
7.29
5.84
7.64
5.73
5.76

4.45
4.07
4.37
4.18
4.09
3.73
3.81
3.62
3.95
4.12
4.88
4.78
4.69
4.53
4.57
4.45
4.40
4.57
5.09
5.66
4.65
5.94
4.57
4.54

2.77
2.69
2.87
2.65
2.73
2.47
2.48
2.44
2.59
2.69
3.31
3.28
3.20
3.20
3.27
3.19
3.15
3.22
3.37
3.62
3.16
3.82
3.13
3.14

1.53
1.60
1.61
1.47
1.53
1.42
1.43
1.42
1.45
1.46
1.97
1.97
1.94
1.95
2.01
2.00
1.96
1.92
1.92
1.97
1.92
2.01
1.94
1.83

1.90
1.71
1.51
1.99
1.75
1.86
1.85
1.97
1.97
1.99
1.98
1.78
1.41
1.61
1.83
1.94
1.90
1.55
1.44
1.70
1.76
1.88
1.97
1.88

271

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

245
299
306
262
281
255
267
223
231
253
292
263
234
208
229
244
240
248
239
239
236
246
228
190

Granular Roadbed

24
33
28
26
31
34
32
36
30
27
29
31
32
35
37
38
38
33
25
20
32
19
34
31

26
26
25
27
26
29
28
29
28
27
21
21
21
21
21
21
21
21
21
20
22
19
21
22

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)

8

12

18

24

36

60

RMS
Error
(%)

13.30
16.85
12.43
15.14
15.10
12.95
12.52
14.16
14.32
11.80
12.57
13.28
12.30
11.88
11.93
11.98
13.00
13.15
13.18
13.27
13.11
13.57
13.45
12.98

9.81
12.57
9.38
11.71
11.73
9.97
9.56
10.68
10.88
9.06
9.67
10.15
9.26
8.79
8.95
8.65
9.57
9.78
10.48
10.29
10.05
10.16
9.86
9.74

7.82
10.11
7.40
9.38
9.44
8.03
7.69
8.46
8.49
7.20
7.71
7.92
7.27
6.78
7.04
6.61
7.30
7.61
8.40
8.22
8.02
8.03
7.77
7.68

5.76
7.49
5.47
7.02
7.09
5.95
5.56
6.10
5.92
5.24
5.62
5.56
5.27
4.81
4.96
4.65
5.15
5.39
6.23
6.07
5.95
5.93
5.69
5.70

4.58
5.88
4.32
5.52
5.60
4.79
4.25
4.65
4.45
4.07
4.37
4.18
4.09
3.73
3.81
3.62
3.95
4.12
4.88
4.78
4.72
4.69
4.53
4.57

3.21
3.82
2.98
3.61
3.69
3.35
2.77
2.96
2.77
2.69
2.87
2.65
2.73
2.47
2.48
2.44
2.59
2.69
3.31
3.28
3.30
3.20
3.20
3.27

1.86
2.04
1.81
1.92
1.97
1.98
1.62
1.62
1.53
1.60
1.61
1.47
1.53
1.42
1.43
1.42
1.45
1.46
1.97
1.97
2.01
1.93
1.94
2.01

1.50
1.76
1.62
1.80
1.80
1.64
1.56
1.29
1.90
1.71
1.51
1.99
1.75
1.86
1.85
1.97
1.97
1.99
1.98
1.78
1.74
1.39
1.60
1.83

272

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

239
244
255
293
298
276
292
267
245
299
306
262
281
255
267
223
231
253
292
263
251
235
209
229

Granular Roadbed

33
20
35
21
21
32
30
24
24
33
28
26
31
34
32
36
30
27
29
31
33
32
35
37

22
19
23
20
20
21
26
25
26
26
25
27
26
29
28
29
28
27
21
21
21
21
21
21

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997

8

12

18

24

36

60

RMS
Error
(%)

12.44
12.42
13.00
14.85
16.42
13.39
17.09
13.30
14.13
14.18
14.37
13.30
16.85
12.43
15.14
15.10
12.95
16.77
10.12
7.40
11.26
9.17
8.03
10.67

9.45
9.34
9.78
11.27
12.72
10.13
12.65
10.00
10.38
10.46
10.43
9.81
12.57
9.38
11.71
11.73
9.97
12.56
7.80
6.22
8.03
5.79
6.85
8.35

7.45
7.43
7.80
8.93
10.03
7.98
10.15
7.90
8.03
8.16
8.00
7.82
10.11
7.40
9.38
9.44
8.03
10.31
6.57
5.31
6.30
4.65
5.98
6.46

5.60
5.50
5.76
6.52
7.29
5.84
7.64
5.80
5.82
5.93
5.76
5.76
7.49
5.47
7.02
7.09
5.95
8.15
5.31
4.37
4.69
3.58
4.88
4.72

4.45
4.40
4.57
5.09
5.66
4.65
5.94
4.60
4.54
4.64
4.54
4.58
5.88
4.32
5.52
5.60
4.79
6.26
4.17
3.46
3.58
2.76
3.90
3.31

3.19
3.15
3.22
3.37
3.62
3.16
3.82
3.19
3.14
3.16
3.14
3.21
3.82
2.98
3.61
3.69
3.35
3.90
2.80
2.32
2.44
1.77
2.44
1.89

2.00
1.96
1.92
1.93
1.97
1.92
2.01
1.94
1.89
1.90
1.87
1.86
2.04
1.81
1.92
1.98
2.01
2.05
1.61
1.38
1.50
1.14
1.06
0.98

1.94
1.90
1.55
1.42
1.70
1.76
1.88
1.72
1.84
1.62
1.86
1.50
1.76
1.62
1.80
1.71
1.64
1.81
1.21
1.48
1.51
3.36
0.56
1.90

273

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

244
240
248
237
239
236
246
231
195
206
186
239
244
255
293
296
271
388
647
1,174
295
305
1,717
467

Granular Roadbed

38
38
33
25
20
32
19
33
32
30
32
33
20
35
21
21
33
20
41
48
47
67
21
29

21
21
21
21
20
22
19
21
22
21
22
22
19
23
20
20
20
18
24
29
26
35
36
37

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997

8

12

18

24

36

60

RMS
Error
(%)

7.91
11.69
9.21
12.64
7.44
11.50
9.84
7.76
9.80
10.67
8.66
7.05
6.89
7.01
6.85
8.58
8.07
7.83
8.50
6.85
10.16
7.52
9.65
7.32

6.50
8.58
8.15
7.99
6.26
9.49
8.39
6.77
8.39
8.07
7.72
6.06
5.94
5.98
5.87
7.01
6.73
6.34
6.85
5.87
7.80
6.34
7.95
6.22

5.47
7.09
7.24
6.22
5.31
7.99
7.13
5.98
7.32
6.57
6.69
5.35
5.28
5.24
5.16
5.94
5.83
5.31
5.67
5.16
6.14
5.39
6.89
5.51

4.29
5.51
6.02
4.29
4.29
6.18
5.59
5.04
5.98
5.12
5.63
4.53
4.37
4.41
4.33
4.53
4.76
4.13
4.33
4.17
4.53
4.37
5.67
4.65

3.31
4.25
4.88
3.03
3.27
4.72
4.41
4.09
4.76
3.94
4.57
3.62
3.54
3.54
3.46
3.54
3.74
3.11
3.31
3.35
3.31
3.35
4.53
3.78

2.09
2.68
3.11
1.73
2.05
2.72
2.76
2.80
3.15
2.56
3.15
2.44
2.44
2.40
2.40
2.28
2.32
1.89
1.97
2.17
1.85
1.89
3.15
2.64

1.02
1.57
1.50
0.91
1.06
1.22
1.50
1.38
1.61
1.38
1.77
1.34
1.30
1.38
1.38
1.14
0.91
0.91
1.10
1.02
0.94
0.79
1.81
1.46

0.60
1.81
0.90
1.92
1.26
0.49
1.52
0.65
0.36
1.15
1.18
1.02
0.35
1.13
0.96
0.99
1.57
0.50
1.99
0.35
1.15
1.19
0.59
0.60

274

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

1,116
436
1,624
267
1,222
798
875
1,989
1,175
548
1,416
1,757
1,862
1,539
1,595
950
1,745
1,063
761
1,899
549
1,524
921
1,704

Granular Roadbed

33
36
19
33
35
18
29
25
25
36
33
37
37
44
46
33
18
32
37
29
30
23
38
40

36
24
26
39
35
29
25
28
24
27
22
29
30
28
28
32
41
40
34
38
39
47
21
27

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999

8

12

18

24

36

60

RMS
Error
(%)

11.18
8.74
8.43
8.35
7.64
7.32
7.64
7.68
8.35
7.91
9.25
10.63
9.41
8.86
9.33
9.65
9.72
8.43
8.46
7.28
7.17
7.28
7.20
7.32

8.11
6.93
6.77
6.38
5.71
5.59
5.94
5.75
6.02
5.87
6.97
8.07
7.32
6.61
6.93
6.97
6.73
6.30
6.02
5.31
5.28
5.55
5.59
5.51

6.61
5.83
5.79
5.00
4.41
4.53
4.80
4.72
4.65
4.65
5.55
6.46
6.02
5.28
5.43
5.28
4.96
5.04
4.69
4.17
4.25
4.57
4.57
4.53

5.04
4.80
4.65
3.78
3.43
3.58
3.82
3.66
3.66
3.70
4.33
5.08
4.88
4.21
4.17
4.02
3.62
3.94
3.50
3.35
3.31
3.62
3.78
3.66

3.86
3.78
3.74
2.83
2.52
2.72
2.91
2.87
2.83
2.80
3.27
3.90
3.82
3.31
3.15
2.95
2.60
3.03
2.60
2.52
2.44
2.83
2.95
2.95

2.48
2.52
2.52
1.81
1.73
1.89
2.01
1.97
2.05
1.97
2.20
2.60
2.72
2.20
2.05
1.97
1.69
2.01
1.69
1.69
1.61
1.93
2.09
2.05

1.38
1.42
1.38
0.98
1.02
1.10
1.18
1.26
1.26
1.14
1.30
1.46
1.65
1.26
1.14
1.06
0.91
1.14
0.91
0.98
0.91
1.14
1.18
1.18

1.05
1.31
0.80
1.01
1.97
1.20
1.26
1.91
1.57
1.50
1.28
1.11
1.10
1.57
1.07
1.82
1.71
1.01
1.36
1.79
1.29
0.83
1.79
1.59

275

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

438
885
988
540
454
616
615
487
347
489
444
439
503
508
443
367
301
523
434
530
603
652
765
679

Granular Roadbed

38
42
41
42
57
57
53
62
65
57
45
36
47
46
41
42
42
47
46
59
53
56
55
58

27
27
28
35
34
32
30
29
28
30
27
23
21
27
30
32
37
30
37
35
38
31
29
29

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999

8

12

18

24

36

60

RMS
Error
(%)

8.74
8.43
10.39
10.08
11.57
10.51
8.70
9.84
9.37
10.04
10.31
7.68
9.06
9.88
9.21
7.68
9.21
9.49
10.31
10.39
9.21
8.74
9.09
8.58

6.26
6.50
7.99
7.52
8.43
7.76
6.42
6.93
7.09
7.40
7.17
5.31
6.38
6.77
6.54
5.31
6.54
7.09
7.17
7.44
6.34
5.91
6.73
5.87

4.96
5.31
6.46
5.71
6.54
6.18
5.20
5.28
5.79
5.94
5.55
3.98
5.04
5.16
5.04
4.13
5.00
5.75
5.51
5.71
4.80
4.49
5.35
4.45

3.86
4.17
5.04
4.29
4.92
4.88
4.17
4.02
4.72
4.72
4.21
3.03
3.94
3.90
3.86
3.19
3.82
4.53
4.06
4.33
3.50
3.39
4.02
3.23

2.95
3.35
3.78
3.07
3.66
3.78
3.31
3.07
3.74
3.70
3.19
2.24
3.07
2.99
2.99
2.44
2.87
3.50
2.95
3.39
2.68
2.56
3.03
2.40

2.01
2.17
2.36
1.89
2.32
2.72
2.32
2.13
2.64
2.56
2.13
1.54
2.13
2.13
1.93
1.57
1.89
2.40
1.85
2.24
1.81
1.73
1.89
1.50

1.10
1.18
1.14
0.98
1.22
1.61
1.42
1.22
1.50
1.42
1.26
0.87
1.26
1.26
1.06
0.94
1.02
1.34
0.98
1.26
1.02
1.06
1.06
0.79

1.74
1.47
1.91
1.61
1.50
1.08
1.08
1.20
1.80
1.86
1.13
1.64
1.04
1.07
1.90
1.83
1.79
1.30
1.27
1.44
0.87
1.63
0.87
1.67

276

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

446
685
603
411
358
341
441
296
528
437
289
366
352
252
377
411
377
481
337
324
296
284
455
366

Granular Roadbed

48
41
26
33
31
46
56
49
45
41
45
61
54
54
45
60
45
42
37
42
51
59
39
46

31
29
28
33
27
22
25
28
23
24
27
39
27
28
31
37
33
25
34
27
33
33
32
41

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)

8

12

18

24

36

60

RMS
Error
(%)

7.99
7.83
7.28
7.52
7.99
7.28
7.28
7.95
9.02
10.20
10.08
7.83
8.90
8.15
8.46
7.52
7.05
6.57
6.77
5.98
7.36
7.05
8.03
7.48

5.59
5.59
5.20
5.51
5.71
5.31
5.59
6.02
6.61
7.48
7.28
5.75
6.73
6.18
6.54
5.51
5.39
5.00
4.96
4.37
5.59
5.31
5.94
5.59

4.17
4.33
4.13
4.41
4.41
4.17
4.57
4.92
5.24
5.98
5.75
4.57
5.39
5.04
5.24
4.41
4.53
3.86
3.86
3.50
4.45
4.25
4.61
4.45

2.91
3.15
2.99
3.35
3.35
3.15
3.43
3.86
4.02
4.57
4.41
3.46
4.25
4.02
4.09
3.43
3.58
2.91
2.87
2.76
3.54
3.43
3.58
3.43

2.05
2.28
2.20
2.56
2.52
2.32
2.60
2.95
3.03
3.50
3.35
2.64
3.31
3.23
3.11
2.64
2.91
2.20
2.13
2.13
2.72
2.64
2.72
2.56

1.22
1.50
1.38
1.69
1.69
1.54
1.77
1.97
2.09
2.36
2.28
1.77
2.32
2.40
2.09
1.81
1.89
1.46
1.50
1.50
1.93
1.89
1.89
1.73

0.63
0.79
0.79
0.98
0.98
0.87
0.98
1.14
1.14
1.38
1.34
1.02
1.46
1.50
1.26
1.10
1.10
0.91
0.91
0.98
1.22
1.22
1.14
1.10

1.04
1.43
1.00
0.66
1.04
1.01
1.04
0.92
1.45
0.60
0.91
0.64
1.60
0.84
1.67
1.17
1.50
1.79
1.64
1.75
1.48
1.64
1.36
1.89

277

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

413
457
490
514
405
508
627
588
427
369
343
476
415
457
505
470
803
599
498
593
559
566
466
525

Granular Roadbed

45
49
53
55
56
55
52
49
45
42
45
54
54
66
48
61
53
63
66
84
62
69
55
57

52
43
44
35
35
39
35
30
29
25
26
34
24
24
28
32
31
45
45
42
33
34
35
37

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)

8

12

18

24

36

60

RMS
Error
(%)

7.64
9.06
7.17
8.50
7.20
6.81
7.60
7.13
6.10
6.73
7.60
6.26
7.28
7.44
7.91
6.89
7.17
9.21
8.86
7.64
8.19
7.87
8.86
7.09

5.83
6.61
5.43
6.46
5.31
5.00
5.63
5.24
4.61
4.84
5.55
4.45
5.43
5.51
5.94
4.84
5.16
6.69
6.54
5.83
6.02
5.87
6.54
5.16

4.69
5.31
4.33
5.20
4.13
3.90
4.29
4.13
3.66
3.82
4.37
3.54
4.33
4.53
4.80
3.74
4.06
5.16
5.12
4.72
4.84
4.69
5.20
4.09

3.70
4.13
3.35
4.02
3.15
2.95
3.15
3.15
2.91
2.83
3.39
2.72
3.43
3.58
3.78
2.76
3.11
3.74
4.02
3.78
3.78
3.70
4.09
3.19

2.87
3.27
2.64
3.03
2.36
2.17
2.24
2.40
2.20
2.13
2.56
2.09
2.56
2.72
2.95
2.05
2.40
2.68
3.23
2.91
2.91
2.87
3.23
2.40

2.01
2.28
1.73
1.97
1.46
1.30
1.42
1.61
1.57
1.34
1.65
1.38
1.69
1.85
2.01
1.30
1.57
1.65
2.36
1.97
1.97
1.97
2.20
1.57

1.30
1.46
1.02
1.14
0.87
0.75
0.79
0.98
0.91
0.79
0.94
0.83
0.94
1.06
1.26
0.75
0.94
0.91
1.46
1.14
1.18
1.22
1.30
0.94

1.54
0.87
1.13
0.87
1.61
1.56
1.38
0.86
1.93
0.85
1.58
1.20
1.85
1.60
1.12
0.97
1.23
0.98
1.21
1.41
1.04
1.14
1.57
1.40

278

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

546
405
657
589
593
657
525
536
744
591
586
615
702
689
550
529
540
437
385
706
525
530
483
590

Granular Roadbed

60
54
53
41
50
49
45
59
67
56
49
67
48
50
54
56
58
37
58
48
50
55
47
56

32
28
38
34
45
52
48
40
43
50
41
47
41
37
32
52
41
42
27
34
33
33
30
41

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)

8

12

18

24

36

60

RMS
Error
(%)

9.33
7.83
7.48
7.01
7.60
9.88
8.50
9.76
9.09
8.62
8.62
8.58
7.95
7.01
7.48
5.79
7.20
6.81
6.61
7.76
7.36
8.66
8.15
8.62

6.81
5.31
5.00
5.00
5.59
7.17
6.18
7.01
6.73
6.18
5.98
6.10
5.16
4.88
5.04
4.17
5.00
4.76
4.61
5.55
5.24
6.10
6.02
6.46

5.43
4.09
3.66
3.90
4.37
5.55
4.76
5.47
5.39
4.76
4.57
4.69
3.74
3.74
3.74
3.35
3.78
3.66
3.46
4.45
4.13
4.80
4.80
5.12

4.17
2.99
2.44
3.03
3.43
4.17
3.54
4.13
4.25
3.62
3.43
3.66
2.60
2.64
2.72
2.52
2.76
2.72
2.52
3.35
3.11
3.62
3.70
4.02

3.11
2.09
1.69
2.28
2.68
3.19
2.60
3.19
3.31
2.72
2.64
2.83
1.81
1.89
1.93
1.89
2.01
2.01
1.81
2.52
2.36
2.72
2.76
2.99

2.01
1.26
0.98
1.61
1.89
2.09
1.57
2.09
2.24
1.77
1.77
1.97
1.10
1.14
1.26
1.30
1.30
1.30
1.22
1.65
1.57
1.89
1.85
2.01

1.14
0.71
0.51
1.02
1.14
1.22
0.87
1.18
1.30
1.02
1.14
1.26
0.63
0.67
0.75
0.79
0.79
0.79
0.75
0.98
0.91
1.22
1.14
1.22

1.30
1.60
1.71
1.58
1.24
1.03
1.35
1.66
1.61
1.38
1.69
1.56
1.06
0.93
1.40
0.87
1.26
1.15
1.84
0.79
1.15
1.84
1.41
1.47

279

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

485
454
412
450
481
382
507
412
507
440
318
351
329
491
374
651
427
490
432
511
526
354
504
503

Granular Roadbed

38
46
47
70
60
40
39
40
43
45
58
58
52
55
60
76
60
63
69
52
56
57
51
46

33
53
70
39
34
31
43
32
30
37
35
32
60
59
53
52
51
51
55
40
43
34
36
33

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997

8

12

18

24

36

60

RMS
Error
(%)

9.06
7.01
7.60
7.17
6.61
7.20
14.88
7.87
7.68
12.36
11.46
8.39
8.11
9.53
8.50
10.31
8.11
7.91
10.98
6.77
6.85
6.77
7.91
9.41

6.61
5.16
5.67
5.31
4.76
5.39
12.56
6.61
6.30
9.29
9.29
7.05
6.85
7.52
7.40
8.39
6.65
6.38
8.46
5.43
5.75
5.59
6.30
7.87

5.20
4.09
4.65
4.29
3.86
4.37
10.67
5.71
5.35
7.64
7.87
5.98
5.83
6.18
6.69
7.13
5.59
5.43
6.85
4.57
4.92
4.76
5.39
6.77

3.90
3.11
3.66
3.39
3.03
3.39
8.54
4.69
4.37
5.79
6.18
4.57
4.45
4.84
5.79
5.67
4.33
4.25
5.12
3.70
4.06
3.90
4.29
5.67

3.03
2.32
2.83
2.60
2.36
2.60
6.69
3.82
3.50
4.45
4.88
3.58
3.54
3.82
4.80
4.53
3.31
3.27
3.86
2.87
3.19
3.03
3.43
4.53

2.09
1.50
2.01
1.89
1.61
1.77
4.21
2.60
2.40
2.91
3.19
2.36
2.36
2.36
3.50
2.99
2.09
2.09
2.40
1.85
2.13
2.05
2.32
3.19

1.26
0.91
1.22
1.22
1.06
1.14
2.13
1.50
1.42
1.73
1.77
1.34
1.38
1.22
2.13
1.65
1.14
1.10
1.34
0.94
1.14
1.14
1.30
1.77

0.62
1.22
0.90
1.53
1.86
1.63
0.60
0.58
0.75
1.17
0.41
1.66
1.87
1.28
0.83
0.34
1.21
0.42
0.92
1.20
0.74
0.90
0.50
0.96

280

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

395
591
583
507
555
565
667
1,224
1,030
387
659
867
881
790
1,624
780
896
1,001
481
1,305
1,451
1,256
953
1,054

Granular Roadbed

49
54
57
70
74
61
17
45
52
36
30
41
45
33
41
33
39
39
34
43
43
50
47
36

32
44
33
34
39
36
18
26
28
22
22
29
28
31
19
23
33
34
28
40
34
34
29
22

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997

8

12

18

24

36

60

RMS
Error
(%)

9.13
10.31
10.16
10.87
8.58
8.11
10.98
8.39
6.73
9.92
7.09
10.16
11.30
9.88
10.94
7.76
9.92
12.01
8.74
7.24
9.21
7.60
10.71
9.53

7.68
8.58
7.91
8.39
6.57
6.73
7.48
7.01
5.67
7.52
6.06
7.87
8.70
6.81
7.76
6.02
7.52
9.09
7.13
6.18
7.36
6.22
8.74
7.68

6.65
7.24
6.54
6.73
5.39
5.79
5.83
5.98
4.88
5.83
5.24
6.10
7.13
5.12
5.94
5.08
6.14
7.13
5.98
5.31
6.06
5.24
7.24
6.38

5.55
5.83
5.20
4.96
4.13
4.76
4.37
4.80
3.98
4.29
4.41
4.49
5.59
3.70
4.13
4.02
4.88
5.28
4.76
4.29
4.65
4.17
5.63
5.12

4.45
4.53
4.06
3.58
3.15
3.66
3.31
3.78
3.15
3.07
3.46
3.31
4.21
2.72
3.19
3.07
3.70
3.90
3.78
3.35
3.58
3.15
4.25
3.98

3.15
2.99
2.80
2.05
2.01
2.36
2.13
2.60
2.05
1.73
2.24
1.93
2.60
1.65
1.97
1.93
2.32
2.36
2.56
2.20
2.20
2.05
2.56
2.64

1.77
1.65
1.61
0.91
1.10
1.30
1.26
1.50
1.02
0.79
0.98
0.94
1.46
0.91
1.02
0.94
1.30
1.34
1.50
1.22
1.14
1.10
1.30
1.38

0.77
0.90
0.69
1.34
0.49
1.47
1.42
0.96
0.51
1.68
1.27
1.33
1.51
1.11
1.86
1.51
1.58
1.58
0.77
1.28
0.54
1.08
0.86
1.16

281

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

1,098
789
568
614
675
1,125
303
944
1,635
583
2,027
543
531
349
345
1,057
594
380
786
1,261
759
1,007
705
825

Granular Roadbed

37
31
42
24
43
36
46
43
36
28
23
30
31
44
38
37
37
32
44
41
33
41
25
33

22
23
24
38
34
30
30
26
37
43
39
37
26
40
35
39
29
28
26
31
32
34
28
27

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-08-04-1999

8

12

18

24

36

60

RMS
Error
(%)

8.27
8.43
8.54
8.15
9.53
7.68
7.60
7.24
7.60
8.07
8.11
8.27
6.77
7.44
7.36
7.17
9.45
6.93
7.60
7.64
7.99
7.40
11.22
8.54

6.85
6.93
6.93
6.77
7.72
6.38
6.54
6.06
6.46
6.42
6.81
6.61
5.55
5.87
6.06
5.91
7.17
5.67
6.34
6.34
6.42
6.10
8.90
6.38

5.83
5.94
5.83
5.79
6.30
5.39
5.71
5.24
5.71
5.31
5.94
5.55
4.65
4.80
5.08
4.96
5.98
4.88
5.47
5.39
5.47
5.16
7.28
4.92

4.72
4.84
4.65
4.57
4.92
4.33
4.69
4.25
4.69
4.17
4.80
4.37
3.62
3.70
4.06
3.90
4.57
3.98
4.53
4.37
4.33
4.13
5.47
3.78

3.66
3.90
3.46
3.58
3.70
3.31
3.74
3.31
3.86
3.19
3.82
3.39
2.68
2.72
3.11
3.07
3.46
3.07
3.54
3.43
3.39
3.19
4.09
2.99

2.44
2.72
2.09
2.28
2.24
2.09
2.60
2.20
2.68
1.93
2.48
2.13
1.65
1.61
2.01
1.97
2.09
1.97
2.32
2.28
2.28
2.09
2.60
2.01

1.34
1.61
0.91
1.18
1.18
1.06
1.42
1.26
1.61
0.91
1.34
1.22
0.83
0.83
1.10
1.06
1.14
1.06
1.26
1.22
1.34
1.22
1.50
1.22

0.84
0.57
1.24
0.29
1.20
0.81
0.73
1.33
0.97
1.24
0.71
1.53
1.05
1.01
1.06
0.60
1.31
1.13
1.02
0.61
0.94
1.69
1.84
1.59

282

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

1,024
920
1,138
1,097
725
1,155
1,417
1,178
1,280
1,043
1,221
817
1,142
880
1,035
1,097
639
1,290
1,293
1,174
840
988
487
401

Granular Roadbed

38
47
24
33
31
34
38
45
48
31
34
42
39
39
43
43
36
42
37
39
48
47
32
54

28
24
39
32
31
35
27
30
24
40
28
31
44
44
34
35
33
36
30
31
28
32
25
29

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999

8

12

18

24

36

60

RMS
Error
(%)

8.46
8.23
9.09
9.06
8.07
9.37
9.02
10.51
9.65
9.37
8.46
9.92
9.21
9.45
10.35
9.09
8.58
8.62
7.83
10.04
9.88
9.09
10.43
10.28

6.02
5.98
6.65
6.14
5.31
6.97
6.77
7.56
6.73
6.65
5.79
7.24
6.34
6.57
6.93
6.26
6.10
6.02
5.43
6.81
6.54
5.87
6.97
7.13

4.92
4.69
5.28
4.61
4.06
5.63
5.51
6.02
5.20
5.28
4.41
5.79
5.04
5.16
5.04
4.92
4.84
4.72
4.09
5.08
4.92
4.37
5.28
5.47

3.86
3.66
4.17
3.39
3.07
4.45
4.37
4.69
3.78
4.09
3.35
4.76
4.02
3.98
3.66
3.78
3.78
3.50
3.07
3.74
3.78
3.35
4.06
4.13

2.99
2.87
3.35
2.56
2.36
3.50
3.35
3.58
2.83
3.11
2.48
3.74
3.07
2.95
2.76
2.95
2.87
2.52
2.40
2.87
2.95
2.48
3.15
3.15

2.05
2.09
2.40
1.73
1.65
2.52
2.32
2.44
1.81
2.13
1.61
2.68
2.17
1.93
1.81
1.89
1.97
1.61
1.65
1.93
2.13
1.69
2.24
2.09

1.26
1.34
1.46
1.06
0.98
1.54
1.38
1.42
1.02
1.18
0.91
1.65
1.30
1.10
1.06
1.10
1.22
0.94
1.02
1.10
1.26
0.98
1.30
1.22

1.43
1.89
0.86
1.82
0.84
0.79
1.08
1.02
0.53
1.56
1.51
1.61
1.59
1.54
1.47
1.87
1.70
1.69
1.66
1.05
1.10
1.66
1.28
1.04

283

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

414
341
366
266
291
393
473
347
327
391
366
356
324
359
221
366
370
372
313
254
222
252
226
283

Granular Roadbed

57
69
58
57
69
53
48
42
43
46
52
52
56
45
47
49
57
48
68
49
59
58
52
45

28
27
24
34
36
23
25
24
33
29
38
21
26
31
32
31
29
36
35
31
27
35
26
28

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999

8

12

18

24

36

60

RMS
Error
(%)

9.76
9.37
9.09
8.31
9.09
9.45
9.49
8.50
9.69
9.57
8.31
8.43
9.37
10.63
10.08
9.96
10.71
11.34
9.76
10.39
10.20
10.35
9.45
9.92

6.77
6.61
6.34
5.94
6.61
6.65
6.50
6.38
7.32
7.13
6.02
5.91
6.81
8.03
7.56
7.24
7.76
7.99
7.17
7.68
7.36
7.24
6.73
6.73

5.16
5.08
4.84
4.57
5.28
5.16
5.04
5.12
5.87
5.79
4.80
4.57
5.47
6.54
6.06
5.87
5.98
6.10
5.63
6.14
5.71
5.51
5.16
5.04

3.82
3.82
3.62
3.46
4.09
3.94
3.94
4.02
4.72
4.45
3.70
3.43
4.29
5.08
4.72
4.57
4.49
4.53
4.33
4.61
4.29
3.94
3.82
3.54

2.95
2.83
2.72
2.56
3.07
2.95
2.91
3.07
3.70
3.46
2.76
2.52
3.27
4.02
3.70
3.54
3.39
3.39
3.27
3.50
3.31
2.91
2.83
2.56

2.01
1.81
1.73
1.65
1.97
2.05
2.01
2.09
2.56
2.28
1.81
1.69
2.20
2.68
2.64
2.36
2.20
2.13
2.17
2.17
2.24
1.89
1.77
1.61

1.22
0.94
0.94
0.87
1.06
1.18
1.18
1.14
1.46
1.30
1.06
0.94
1.26
1.46
1.57
1.34
1.18
1.26
1.22
1.14
1.34
1.10
0.94
0.94

1.33
1.97
1.45
1.93
1.57
1.14
1.69
1.45
1.53
0.66
1.37
1.15
1.22
1.43
0.81
1.19
1.45
1.67
1.04
1.09
1.06
1.32
1.30
1.62

284

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

263
392
368
450
485
320
304
555
486
470
464
387
434
486
377
428
357
275
405
456
311
277
386
265

Granular Roadbed

52
40
44
45
40
49
51
46
44
42
51
52
45
35
47
42
37
38
42
32
46
43
40
44

29
34
35
37
31
29
29
30
24
27
33
37
27
23
22
26
29
28
28
29
26
32
35
37

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)

8

12

18

24

36

60

RMS
Error
(%)

10.04
10.35
9.29
9.76
9.29
9.09
8.50
8.11
9.33
8.74
9.49
7.83
8.15
8.74
7.83
9.17
9.33
9.09
8.66
8.82
9.09
8.82
8.78
8.86

7.24
7.24
6.30
6.61
6.26
6.57
5.91
5.71
6.81
6.18
6.65
5.94
6.30
6.50
5.79
6.22
5.98
5.87
5.47
5.55
5.67
5.51
5.31
5.51

5.63
5.51
4.76
4.80
4.65
5.16
4.65
4.53
5.47
4.88
5.20
4.69
4.92
5.20
4.53
4.92
4.45
4.29
4.09
4.02
4.17
4.02
3.86
3.82

4.29
4.02
3.43
3.43
3.31
3.94
3.46
3.54
4.29
3.78
4.02
3.66
3.82
4.06
3.50
3.94
3.15
3.03
3.03
2.95
3.11
2.91
2.76
2.80

3.27
2.95
2.64
2.48
2.44
2.95
2.64
2.76
3.39
2.91
3.07
2.83
2.80
3.11
2.60
3.07
2.36
2.28
2.32
2.24
2.32
2.20
2.09
2.09

2.20
1.85
1.69
1.54
1.54
1.97
1.73
1.97
2.28
1.97
2.13
1.97
1.81
2.05
1.81
2.20
1.54
1.50
1.54
1.54
1.57
1.50
1.46
1.42

1.34
0.98
0.98
0.87
0.83
1.14
1.06
1.22
1.30
1.22
1.34
1.22
0.98
1.14
1.14
1.34
0.94
0.94
0.94
0.98
0.94
0.94
0.91
0.87

1.46
1.19
0.97
1.38
1.17
1.03
1.63
1.15
1.41
1.59
1.84
1.71
1.55
1.17
1.92
1.90
0.97
1.65
1.35
1.78
1.41
1.40
1.11
1.88

285

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

323
330
291
271
302
388
347
360
430
357
299
479
571
516
440
311
242
234
256
219
238
220
198
206

Granular Roadbed

46
38
51
44
45
47
56
67
46
57
56
60
42
44
57
58
52
56
61
67
60
64
67
63

26
34
35
39
40
30
33
29
26
29
27
29
34
30
35
29
42
42
42
42
42
43
44
46

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)

8

12

18

24

36

60

RMS
Error
(%)

9.61
8.90
9.09
9.88
8.39
9.49
7.44
8.58
8.23
8.74
9.49
8.82
8.90
9.02
8.03
8.23
7.60
7.36
6.61
6.34
6.89
9.33
8.82
8.19

6.02
5.59
6.02
6.77
6.30
6.81
5.04
5.31
5.59
6.02
5.87
5.98
5.75
5.63
6.06
6.54
5.75
5.59
5.04
4.53
5.04
7.28
6.65
6.22

4.29
4.02
4.33
5.31
5.00
5.31
3.86
3.94
4.17
4.69
4.49
4.80
4.29
4.25
4.88
5.35
4.69
4.53
4.13
3.62
4.06
6.02
5.35
5.04

3.19
2.95
3.23
4.17
3.86
4.06
2.91
2.87
3.03
3.62
3.35
3.66
3.11
3.27
3.86
4.33
3.70
3.46
3.23
2.80
3.07
4.72
4.33
3.94

2.44
2.24
2.44
3.23
2.95
3.11
2.13
2.13
2.28
2.72
2.52
2.80
2.24
2.48
3.03
3.31
2.76
2.60
2.44
2.09
2.32
3.66
3.46
2.95

1.65
1.57
1.65
2.28
2.05
2.09
1.46
1.38
1.46
1.85
1.73
1.81
1.42
1.69
1.97
2.24
1.77
1.73
1.65
1.38
1.57
2.32
2.44
1.81

1.02
0.94
1.02
1.50
1.26
1.26
0.91
0.83
0.87
1.14
1.02
1.10
0.79
1.02
1.18
1.26
0.94
0.94
0.94
0.83
0.98
1.18
1.50
0.94

1.61
1.32
1.75
1.65
1.06
0.93
1.67
1.47
1.11
1.45
1.63
1.83
1.95
1.93
1.47
1.42
1.79
1.42
1.06
1.33
1.23
1.76
1.35
1.65

286

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

204
219
249
275
469
365
365
259
339
347
233
380
312
245
631
789
802
725
809
634
547
793
513
762

Granular Roadbed

60
65
58
56
51
45
64
58
53
54
56
50
47
61
49
40
41
46
55
66
64
28
52
34

40
42
39
27
32
31
44
47
45
35
37
35
47
38
35
32
42
42
43
49
42
33
27
41

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998

8

12

18

24

36

60

RMS
Error
(%)

8.58
9.37
8.98
8.31
8.43
9.21
8.90
7.60
7.28
7.44
7.68
9.09
7.91
6.89
7.36
7.36
7.36
6.73
6.77
7.32
8.31
15.39
17.99
14.13

6.61
6.81
6.81
6.38
6.46
6.97
6.34
5.51
5.00
5.31
5.75
6.61
5.87
4.96
5.51
5.16
5.63
4.84
4.96
5.51
5.83
11.18
13.11
10.24

5.28
5.31
5.59
5.20
5.35
5.47
4.80
4.29
3.74
4.13
4.57
5.20
4.61
3.82
4.33
4.02
4.45
3.78
3.90
4.45
4.45
8.86
10.24
8.39

4.09
3.94
4.37
4.09
4.21
4.17
3.46
3.19
2.80
3.07
3.54
3.90
3.58
2.83
3.31
2.91
3.39
2.87
2.99
3.50
3.35
6.69
7.68
6.61

2.99
2.91
3.35
3.23
3.23
3.11
2.56
2.48
2.01
2.20
2.68
2.87
2.68
2.09
2.40
2.09
2.44
2.13
2.28
2.68
2.48
5.04
5.83
5.20

1.77
1.85
2.13
2.09
2.13
1.97
1.65
1.65
1.30
1.42
1.73
1.81
1.77
1.22
1.46
1.26
1.46
1.42
1.54
1.81
1.61
3.07
3.58
3.50

0.87
1.02
1.10
1.18
1.14
1.14
0.94
1.06
0.79
0.79
1.06
1.02
1.10
0.67
0.75
0.75
0.79
0.83
0.98
1.06
0.98
1.69
1.85
2.05

1.75
1.09
1.97
1.43
1.61
1.11
0.97
1.73
1.73
1.31
1.52
0.96
1.72
1.60
1.79
1.45
1.19
1.15
1.72
1.11
1.38
1.10
1.35
0.99

287

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

751
442
720
710
750
494
376
424
413
518
568
468
491
623
717
483
707
554
519
656
386
236
209
259

Granular Roadbed

29
38
32
40
37
38
45
62
61
50
51
40
53
48
40
51
40
60
67
53
52
23
19
31

43
38
35
33
34
35
41
39
52
49
39
38
37
57
50
53
49
48
42
38
41
21
19
18

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998

8

12

18

24

36

60

RMS
Error
(%)

17.40
12.76
13.66
12.76
13.11
16.02
16.85
12.99
18.90
17.20
22.95
17.05
24.53
16.77
18.86
19.72
16.93
16.65
14.49
19.02
11.65
13.70
19.25
16.18

13.46
9.65
9.21
9.21
8.90
11.34
12.17
9.09
13.90
11.50
15.24
11.10
17.44
11.77
14.02
13.70
12.01
11.14
9.21
11.69
8.19
9.57
13.50
12.28

10.98
7.99
7.17
7.36
6.89
9.02
9.72
7.09
10.91
8.82
11.38
8.35
13.19
9.29
11.06
10.39
9.69
8.66
6.81
8.35
6.77
7.20
10.39
10.28

8.70
6.57
5.51
5.79
5.20
7.01
7.20
5.47
8.03
6.61
8.23
6.34
9.53
7.44
8.70
7.68
7.64
6.61
5.24
6.18
5.51
5.51
7.44
7.83

6.81
5.28
4.41
4.57
4.06
5.47
5.31
4.29
5.91
4.80
6.02
4.72
6.81
5.91
6.73
5.75
6.14
5.12
4.06
4.88
4.45
4.33
5.16
5.79

4.41
3.62
3.07
3.27
2.80
3.74
3.31
2.99
3.58
3.03
3.58
3.19
4.41
4.06
4.49
3.70
4.41
3.54
2.87
3.35
3.23
2.87
2.87
3.54

2.40
2.13
1.97
2.05
1.73
2.28
1.93
1.89
1.93
1.69
1.97
1.89
2.24
2.32
2.40
1.97
2.56
2.20
1.77
2.05
2.01
1.65
1.54
1.65

0.96
1.41
1.67
1.24
1.40
1.11
1.80
1.69
0.86
1.36
1.31
1.44
1.97
1.86
1.75
1.38
1.20
1.44
1.60
1.83
1.15
1.55
1.64
1.27

288

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

278
351
165
228
177
179
190
193
183
156
112
128
120
188
202
144
178
137
126
86
258
195
161
333

Granular Roadbed

19
33
45
43
42
31
23
42
18
25
18
31
15
29
20
21
30
34
44
34
50
35
17
16

15
17
19
18
21
16
19
20
18
21
18
19
15
15
14
17
14
17
21
18
18
22
22
21

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998

8

12

18

24

36

60

RMS
Error
(%)

17.48
15.39
17.99
14.13
17.40
12.76
13.66
12.76
13.11
16.02
16.85
12.99
18.90
17.20
22.95
17.05
24.53
16.77
18.86
19.72
16.93
16.65
14.49
19.02

11.97
11.18
13.11
10.24
13.46
9.65
9.21
9.21
8.90
11.34
12.17
9.09
13.90
11.50
15.24
11.10
17.44
11.77
14.02
13.70
12.01
11.14
9.21
11.69

9.13
8.86
10.24
8.39
10.98
7.99
7.17
7.36
6.89
9.02
9.72
7.09
10.91
8.82
11.38
8.35
13.19
9.29
11.06
10.39
9.69
8.66
6.81
8.35

6.42
6.69
7.68
6.61
8.70
6.57
5.51
5.79
5.20
7.01
7.20
5.47
8.03
6.61
8.23
6.34
9.53
7.44
8.70
7.68
7.64
6.61
5.24
6.18

4.57
5.04
5.83
5.20
6.81
5.28
4.41
4.57
4.06
5.47
5.31
4.29
5.91
4.80
6.02
4.72
6.81
5.91
6.73
5.75
6.14
5.12
4.06
4.88

2.52
3.07
3.58
3.50
4.41
3.62
3.07
3.27
2.80
3.74
3.31
2.99
3.58
3.03
3.58
3.19
4.41
4.06
4.49
3.70
4.41
3.54
2.87
3.35

1.18
1.69
1.85
2.05
2.40
2.13
1.97
2.05
1.73
2.28
1.93
1.89
1.93
1.69
1.97
1.89
2.24
2.32
2.40
1.97
2.56
2.20
1.77
2.05

1.65
1.10
1.35
0.99
0.96
1.41
1.67
1.24
1.40
1.11
1.80
1.69
0.86
1.36
1.31
1.44
1.97
1.86
1.75
1.38
1.20
1.44
1.60
1.83

289

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

193
236
209
259
278
351
165
228
177
179
190
193
183
156
112
128
120
188
202
144
178
137
126
86

Granular Roadbed

18
23
19
31
19
33
45
43
42
31
23
42
18
25
18
31
15
29
20
21
30
34
44
34

28
21
19
18
15
17
19
18
21
16
19
20
18
21
18
19
15
15
14
17
14
17
21
18

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998

8

12

18

24

36

60

RMS
Error
(%)

11.65
13.70
19.25
16.18
17.48
5.94
5.83
5.63
10.24
9.72
10.51
5.83
6.54
10.20
11.18
10.28
5.98
9.06
6.14
6.50
12.99
10.47
10.51
11.77

8.19
9.57
13.50
12.28
11.97
5.04
4.88
4.88
8.94
8.54
9.13
5.04
5.75
8.78
9.45
8.70
5.04
7.24
5.16
5.43
10.67
8.58
8.27
8.94

6.77
7.20
10.39
10.28
9.13
4.45
4.25
4.29
7.99
7.68
8.19
4.53
5.24
7.83
8.27
7.68
4.29
6.18
4.53
4.76
8.94
7.32
6.73
7.32

5.51
5.51
7.44
7.83
6.42
3.74
3.58
3.58
6.73
6.42
6.81
3.94
4.69
6.61
6.93
6.34
3.43
5.20
3.82
3.94
6.93
5.47
5.08
5.51

4.45
4.33
5.16
5.79
4.57
2.99
2.80
2.87
5.39
5.16
5.35
3.15
3.94
5.28
5.35
4.96
2.68
4.06
2.99
3.11
5.08
4.06
3.82
4.09

3.23
2.87
2.87
3.54
2.52
2.20
1.93
1.97
3.50
3.43
3.50
2.36
2.87
3.58
3.46
3.15
1.77
2.83
2.09
2.17
2.80
2.32
2.40
2.60

2.01
1.65
1.54
1.65
1.18
1.38
1.06
0.98
1.54
1.50
1.54
1.42
1.65
1.77
1.54
1.42
1.02
1.69
1.18
1.34
1.06
0.94
1.30
1.38

1.15
1.55
1.64
1.27
1.65
1.43
1.17
0.84
0.49
0.66
0.88
1.49
0.98
0.77
1.15
0.60
1.59
1.34
1.20
1.73
0.68
1.12
0.98
0.79

290

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

258
195
161
333
193
1,090
1,261
1,658
1,082
1,175
987
1,488
1,979
964
818
865
935
585
1,157
915
485
573
387
337

Granular Roadbed

50
35
17
16
18
60
41
29
10
10
11
49
27
15
12
13
45
37
40
49
10
14
26
24

18
22
22
21
28
31
39
42
28
29
27
29
26
23
26
28
39
24
34
31
33
38
29
27

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998

8

12

18

24

36

60

RMS
Error
(%)

8.35
8.19
7.40
8.07
7.32
9.65
8.46
9.37
8.70
10.20
11.10
8.03
9.17
6.81
7.40
7.01
8.62
11.65
9.80
8.46
7.60
6.73
7.36
6.30

6.57
6.61
6.18
6.57
6.22
8.03
7.24
7.76
7.48
8.54
8.78
6.18
7.32
5.75
6.18
5.87
7.09
9.13
7.52
6.77
6.30
5.59
5.67
4.96

5.55
5.63
5.39
5.67
5.51
7.01
6.46
6.69
6.65
7.40
7.32
5.12
6.14
5.04
5.39
5.12
6.06
7.68
6.14
5.75
5.55
4.76
4.72
4.09

4.49
4.41
4.45
4.72
4.72
5.67
5.47
5.43
5.71
6.02
5.87
3.94
4.84
4.21
4.37
4.21
4.88
6.10
4.69
4.65
4.53
3.86
3.74
3.27

3.43
3.39
3.54
3.74
3.78
4.29
4.29
4.09
4.45
4.57
4.49
2.83
3.66
3.31
3.46
3.31
3.82
4.65
3.50
3.58
3.58
2.95
2.83
2.44

2.24
2.28
2.40
2.48
2.76
2.52
2.80
2.48
3.15
2.64
2.87
1.81
2.36
2.24
2.24
2.24
2.48
2.80
2.17
2.36
2.48
1.89
1.85
1.61

1.26
1.34
1.34
1.30
1.65
0.98
1.18
0.98
1.65
0.94
1.46
0.94
1.30
1.18
1.14
1.22
1.30
1.18
1.14
1.38
1.42
0.91
0.98
0.94

1.04
1.46
0.58
1.08
1.20
0.71
1.05
1.10
1.55
0.71
1.17
1.48
0.95
0.91
0.21
0.80
0.44
1.92
0.52
1.24
0.84
0.96
1.09
1.64

291

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

587
552
976
918
1,064
874
1,316
889
1,094
869
525
561
553
1,192
1,026
1,017
755
592
449
605
854
1,045
660
685

Granular Roadbed

33
37
35
29
42
13
12
14
22
11
22
34
30
31
27
34
27
15
28
36
36
27
38
51

31
29
32
32
26
40
37
40
26
42
28
42
31
35
36
34
31
32
34
30
29
44
40
43

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002

8

12

18

24

36

60

RMS
Error
(%)

6.34
7.44
7.05
7.76
10.31
8.90
12.56
6.42
6.97
8.70
7.13
8.62
7.05
7.13
6.61
7.48
8.66
19.67
17.94
15.84
16.77
20.60
16.75
13.26

5.00
6.30
5.71
6.38
8.07
7.20
9.57
5.08
5.75
6.85
6.14
6.81
5.47
5.43
5.20
5.87
6.77
15.30
14.23
11.97
12.48
15.21
12.56
9.74

4.13
5.47
4.76
5.55
6.65
6.14
7.68
4.33
4.88
5.79
5.59
5.87
4.49
4.45
4.33
5.04
5.63
12.31
11.75
9.37
9.45
11.40
9.71
7.29

3.23
4.53
3.82
4.45
5.04
4.84
5.67
3.39
3.78
4.53
4.80
4.76
3.62
3.39
3.46
4.06
4.53
9.03
8.83
6.53
6.23
7.57
6.86
5.02

2.44
3.62
2.95
3.50
3.82
3.78
4.06
2.48
2.83
3.43
3.90
3.70
2.80
2.56
2.72
3.15
3.50
6.85
6.76
4.87
4.47
5.31
5.13
3.62

1.57
2.64
1.93
2.44
2.32
2.44
2.36
1.50
1.77
2.13
2.80
2.48
1.85
1.69
1.85
2.17
2.36
4.18
4.20
2.99
2.55
3.06
3.33
2.02

0.94
1.61
1.14
1.42
1.14
1.22
1.10
0.71
0.87
0.94
1.61
1.42
1.06
0.98
1.06
1.22
1.26
2.04
2.12
1.55
1.27
1.48
1.91
0.97

1.90
1.30
1.55
0.99
0.81
0.81
1.29
1.02
1.14
1.72
1.04
0.92
1.07
1.03
0.64
0.90
1.44
1.49
0.69
1.34
1.81
1.96
1.75
1.85

292

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

653
817
689
741
479
697
351
898
841
725
1,337
616
637
512
700
685
587
342
412
306
256
206
236
361

Granular Roadbed

51
47
44
39
22
25
18
31
29
21
32
34
47
48
50
41
33
15
17
22
20
16
25
24

44
26
36
29
33
32
34
54
45
40
26
28
38
41
38
33
31
17
17
23
27
23
19
35

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002

8

12

18

24

36

60

RMS
Error
(%)

14.61
12.97
12.93
11.89
10.73
9.24
11.91
14.01
16.86
13.40
12.70
11.98
11.53
11.66
11.85
11.28
10.16
9.24
9.92
11.94
12.47
13.71
11.61
12.56

10.51
10.36
10.69
9.84
8.86
7.73
10.37
11.25
12.35
10.20
10.11
9.38
8.54
8.90
8.55
8.27
7.56
6.97
7.35
9.38
10.11
10.80
9.33
9.74

7.93
8.69
9.08
8.37
7.50
6.69
9.08
9.50
9.95
8.28
8.31
7.63
6.66
7.13
6.61
6.44
6.03
5.58
5.68
7.70
8.51
8.91
7.81
7.89

5.55
6.65
6.90
6.48
5.81
5.33
7.35
7.39
7.32
6.13
6.36
5.71
4.82
5.20
4.62
4.54
4.37
3.99
3.97
5.77
6.68
6.78
5.98
5.85

4.15
5.24
5.32
5.01
4.53
4.22
5.72
5.73
5.58
4.71
5.04
4.48
3.71
3.96
3.49
3.42
3.32
3.03
3.02
4.50
5.33
5.36
4.66
4.54

2.58
3.32
3.12
2.99
2.78
2.68
3.60
3.53
3.34
2.92
3.35
2.94
2.41
2.52
2.10
2.10
2.10
1.92
1.88
2.94
3.58
3.59
2.94
2.93

1.35
1.89
1.38
1.25
1.34
1.34
1.52
1.58
1.73
1.64
1.92
1.64
1.37
1.41
1.10
1.10
1.19
1.10
1.07
1.73
2.10
2.14
1.58
1.69

1.54
1.03
0.60
1.10
0.48
0.18
0.68
1.65
1.39
0.84
0.63
0.70
0.87
0.71
1.26
1.11
0.72
1.24
1.54
1.22
0.69
1.01
0.31
1.04

293

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

274
538
792
972
924
1,225
1,255
748
340
412
493
482
363
437
372
405
451
499
400
466
572
405
655
419

Granular Roadbed

27
27
16
16
22
26
13
16
21
28
31
32
38
33
32
33
40
44
42
34
31
31
27
32

26
19
25
28
26
27
24
22
20
22
19
22
27
26
32
32
31
34
34
21
18
17
23
22

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000

8

12

18

24

36

60

RMS
Error
(%)

15.63
16.00
13.52
13.56
12.85
11.51
12.19
10.34
10.16
11.68
11.10
13.86
10.09
14.11
11.54
11.22
11.46
10.04
8.23
12.52
14.88
14.17
12.95
17.20

12.33
12.58
10.84
10.54
9.99
9.36
10.01
8.27
7.99
9.04
8.95
10.14
8.15
12.11
9.79
9.08
9.34
8.03
6.89
10.51
12.24
11.42
9.76
13.70

10.08
10.56
9.11
8.58
8.12
7.78
8.36
6.85
6.48
7.26
7.43
7.90
6.79
10.49
8.48
7.70
7.98
6.57
6.02
9.17
10.55
9.69
7.80
11.30

7.59
8.23
7.10
6.26
5.84
5.88
6.21
5.04
4.67
5.22
5.51
5.54
5.08
8.32
6.77
6.04
6.24
5.31
5.24
7.68
8.66
7.76
6.06
8.98

6.01
6.55
5.58
4.62
4.25
4.45
4.52
3.65
3.38
3.81
4.19
4.20
3.93
6.60
5.36
4.75
4.92
4.09
4.25
6.14
6.93
6.02
4.53
6.81

3.99
4.28
3.53
2.82
2.40
2.55
2.59
2.02
1.82
2.05
2.39
2.64
2.41
3.99
3.27
2.95
3.19
2.76
3.03
4.25
4.61
3.94
2.83
4.41

2.31
2.30
1.76
1.41
1.10
1.01
1.03
0.81
0.76
0.86
1.00
1.35
1.22
1.68
1.31
1.34
1.57
1.50
1.69
2.28
2.48
2.05
1.57
2.28

0.87
0.98
1.12
0.84
0.76
1.54
1.39
1.04
0.97
1.47
1.43
1.75
0.64
0.54
0.98
1.62
1.12
1.33
1.19
0.73
0.44
0.62
1.20
1.09

294

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

361
469
666
471
539
887
771
842
762
644
843
329
772
971
1,253
967
874
439
884
525
383
355
260
257

Granular Roadbed

26
21
20
22
20
16
16
20
22
20
19
27
28
11
13
20
23
28
29
18
16
17
24
15

16
16
20
25
30
33
32
40
43
38
33
26
29
21
27
26
22
28
25
19
17
20
26
18

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994

8

12

18

24

36

60

RMS
Error
(%)

15.39
11.30
16.81
12.32
8.15
13.31
13.35
12.60
11.18
12.01
14.49
13.46
9.69
16.02
17.28
14.06
13.54
9.36
8.99
9.31
9.38
8.62
9.92
10.57

13.27
9.57
13.66
9.49
6.81
10.59
9.84
9.69
8.11
10.04
11.57
10.67
8.03
12.24
14.33
11.65
11.26
6.83
6.62
6.84
6.81
6.35
7.30
7.71

11.50
8.35
11.46
7.95
5.94
8.70
8.03
7.76
6.30
8.78
9.96
9.13
7.01
10.47
12.13
9.84
9.69
5.60
5.28
5.59
5.44
5.09
5.81
6.18

10.00
7.20
9.65
6.30
5.12
6.69
6.26
6.22
4.96
7.32
8.31
7.48
6.06
7.95
9.69
7.72
7.76
4.36
3.96
4.12
4.07
3.94
4.41
4.64

8.31
5.94
7.68
4.88
4.25
5.04
4.80
4.92
3.86
5.87
6.50
5.79
4.92
5.98
7.36
5.87
6.02
3.50
3.10
3.22
3.01
3.13
3.47
3.59

5.98
4.33
5.12
3.19
3.19
3.31
3.35
3.66
2.87
3.86
4.17
3.74
3.58
3.66
4.69
3.78
4.02
2.24
1.91
2.05
1.94
2.12
2.26
2.23

3.27
2.48
2.52
1.57
1.81
1.61
1.93
2.28
1.77
1.89
2.01
1.93
2.01
1.77
2.36
2.05
2.28
1.18
1.05
1.08
1.04
1.23
1.20
1.18

1.29
1.01
1.82
1.57
1.61
1.90
1.02
1.74
1.92
0.55
1.35
0.93
1.40
0.72
1.26
1.84
1.63
1.92
1.05
0.79
0.74
0.67
1.26
0.88

295

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

530
628
370
382
864
323
235
236
216
589
425
386
702
269
296
325
361
448
381
390
346
368
351
338

Granular Roadbed

13
22
12
20
34
18
28
36
45
14
13
17
26
14
12
17
19
37
39
38
39
52
38
33

13
17
16
25
23
24
21
18
24
22
20
21
21
22
17
20
18
30
33
32
34
29
29
29

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994

8

12

18

24

36

60

RMS
Error
(%)

8.62
10.37
8.63
10.36
11.75
9.31
9.67
9.39
10.60
11.07
10.60
9.83
9.59
10.31
10.02
8.79
9.13
10.06
9.39
10.85
12.85
8.91
10.26
11.12

6.31
7.47
6.12
7.81
9.16
6.86
7.35
7.10
7.98
8.27
7.99
7.31
7.03
7.36
7.32
6.41
6.71
7.14
6.76
8.20
9.74
6.69
7.80
8.47

5.00
5.98
4.86
6.42
7.62
5.56
5.96
5.86
6.46
6.71
6.64
5.87
5.68
5.75
5.85
5.12
5.35
5.82
5.47
6.71
8.06
5.48
6.39
6.73

3.78
4.54
3.69
5.01
6.18
4.28
4.57
4.70
4.96
5.09
5.22
4.51
4.52
4.39
4.47
4.01
4.16
4.46
4.18
5.32
6.52
4.37
5.01
5.16

2.97
3.51
2.90
4.01
5.06
3.33
3.70
3.78
3.89
4.02
4.19
3.60
3.58
3.39
3.45
3.14
3.26
3.55
3.30
4.31
5.37
3.44
3.98
4.07

1.88
2.23
1.88
2.62
3.54
2.11
2.35
2.62
2.44
2.57
2.78
2.40
2.48
2.14
2.18
2.03
2.12
2.31
2.16
2.99
3.76
2.33
2.59
2.74

1.00
1.17
1.05
1.42
2.01
1.09
1.20
1.52
1.25
1.35
1.51
1.35
1.45
1.16
1.14
1.12
1.15
1.23
1.24
1.72
2.06
1.34
1.31
1.46

1.28
1.25
0.84
1.05
1.06
1.39
1.91
0.65
1.33
1.15
1.15
0.85
0.80
1.24
1.21
1.23
1.19
1.77
0.68
0.72
1.92
0.74
1.82
1.62

296

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

406
341
351
393
383
428
464
405
400
355
404
346
337
304
360
398
386
348
337
336
327
416
451
336

Granular Roadbed

42
34
49
35
34
36
32
46
29
31
34
41
48
37
34
44
41
39
45
40
32
46
30
33

35
30
34
25
18
32
29
24
28
26
23
26
25
30
30
31
30
28
29
21
17
27
26
24

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)

8

12

18

24

36

60

RMS
Error
(%)

10.72
10.01
11.43
10.18
9.82
10.20
9.95
8.65
8.22
9.60
10.73
10.50
10.72
9.80
9.15
9.05
9.13
8.58
10.69
9.52
9.69
9.81
9.25
9.20

8.06
7.29
8.70
7.93
7.61
7.62
7.20
6.24
6.07
7.16
7.64
7.80
7.94
7.30
6.52
6.72
6.89
6.01
7.51
6.79
6.83
7.32
6.88
7.05

6.53
5.91
7.12
6.54
6.24
5.97
5.84
4.92
4.90
5.72
6.03
6.42
6.69
6.07
5.24
5.43
5.55
4.59
5.88
5.39
5.34
5.96
5.56
5.78

5.19
4.54
5.51
5.15
4.84
4.48
4.47
3.70
3.69
4.36
4.48
5.04
5.29
4.74
4.05
3.98
4.14
3.32
4.35
4.07
3.93
4.43
4.23
4.48

4.18
3.60
4.40
4.06
3.95
3.45
3.51
2.86
2.88
3.42
3.53
4.02
4.09
3.79
3.10
3.04
3.23
2.48
3.33
3.15
3.11
3.51
3.34
3.62

2.88
2.36
2.99
2.68
2.73
2.18
2.28
1.87
1.90
2.27
2.22
2.68
2.43
2.50
2.07
1.89
2.17
1.51
2.17
2.07
1.99
2.25
2.23
2.51

1.60
1.23
1.66
1.47
1.64
1.18
1.25
1.01
1.04
1.30
1.15
1.48
1.26
1.46
1.07
1.00
1.29
0.85
1.14
1.07
1.04
1.13
1.20
1.51

1.29
1.87
0.75
0.55
1.25
1.06
0.91
0.84
0.56
0.83
1.76
0.93
1.91
0.89
1.94
0.51
1.80
1.22
1.40
1.79
1.89
1.84
1.17
1.03

297

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

350
374
332
429
353
328
348
359
410
334
306
364
449
384
378
393
341
310
280
343
311
399
391
373

Granular Roadbed

38
36
34
33
46
35
39
46
46
43
34
37
26
42
41
37
47
46
37
40
40
33
41
49

22
28
21
24
22
29
28
34
34
27
30
24
28
25
32
35
28
42
30
32
33
30
29
24

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)

8

12

18

24

36

60

RMS
Error
(%)

9.65
9.73
9.08
9.55
9.42
10.23
8.50
10.26
11.64
9.19
9.55
9.29
10.47
10.99
10.53
9.75
9.49
10.25
9.98
8.70
9.08
9.96
9.30
10.77

7.19
7.36
6.71
7.33
6.69
7.37
6.02
7.74
9.07
6.77
7.26
7.02
7.88
8.21
7.93
7.25
6.96
7.31
7.30
6.34
6.68
7.07
6.70
8.14

5.70
5.86
5.33
5.85
5.29
5.91
4.78
6.36
7.54
5.48
5.89
5.80
6.37
6.66
6.59
5.82
5.62
5.72
5.83
5.08
5.32
5.76
5.42
6.66

4.20
4.36
3.91
4.42
3.97
4.49
3.63
4.96
6.12
4.22
4.52
4.65
4.90
5.06
5.19
4.47
4.47
4.36
4.45
3.97
4.14
4.41
4.14
5.27

3.23
3.34
3.04
3.44
3.08
3.47
2.85
3.97
5.02
3.29
3.66
3.74
3.84
3.99
4.16
3.57
3.55
3.37
3.44
3.11
3.24
3.51
3.27
4.27

2.04
2.06
1.93
2.21
1.92
2.20
1.85
2.59
3.51
2.08
2.32
2.59
2.41
2.55
2.76
2.38
2.45
2.13
2.17
2.00
2.11
2.28
2.14
2.96

1.02
0.99
1.01
1.10
0.97
1.15
1.03
1.41
1.99
1.08
1.18
1.51
1.23
1.34
1.50
1.34
1.43
1.15
1.13
1.11
1.14
1.22
1.23
1.71

1.70
1.76
1.15
1.83
1.93
1.09
0.78
0.91
1.06
1.23
1.81
0.57
1.27
1.05
1.05
0.85
0.78
1.18
1.12
1.12
1.15
1.63
0.64
0.68

298

Depth to
Stiff
Layer (in)

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

2-Layer Backcalculated
Resilient Modulus (ksi)
AC

384
421
378
429
351.29
325.61
338.84
374.23
367.1
407.16
439.48
387.7
381.57
337.19
385.32
331.05
323.63
292.66
344.4
380.33
370.21
333.3
322.28
322.13

Granular Roadbed

33
29
38
32
35.839
34.083
48.255
34.294
33.552
35.415
31.989
45.638
28.993
30.182
33.297
41.072
47.809
36.705
33.894
43.561
40.768
38.07
44.659
39.667

33
34
34
31
34.653
29.616
33.862
24.664
17.767
31.611
28.853
23.624
27.72
25.617
23.254
26.314
24.884
29.959
30.09
31.413
30.293
28.22
28.78
20.785

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)

8

12

18

24

36

60

RMS
Error
(%)

12.77
8.84
10.20
11.01
10.66
9.95
11.40
10.12
9.74
10.14
9.85
8.58
8.20
9.57
10.65
10.47
9.59
10.53
9.60
10.48
9.11
8.91
8.99
8.42

9.68
6.64
7.75
8.39
8.01
7.25
8.68
7.88
7.55
7.58
7.12
6.18
6.06
7.14
7.59
7.78
7.33
7.80
7.15
7.45
6.49
6.62
6.79
5.90

8.00
5.45
6.36
6.67
6.50
5.87
7.11
6.50
6.19
5.94
5.78
4.88
4.88
5.70
5.99
6.40
5.64
6.57
5.94
6.03
5.21
5.36
5.47
4.50

6.48
4.33
4.98
5.11
5.16
4.51
5.50
5.12
4.80
4.45
4.43
3.68
3.68
4.35
4.45
5.02
4.42
5.20
4.65
4.69
4.03
3.93
4.08
3.26

5.33
3.42
3.96
4.03
4.16
3.58
4.39
4.03
3.92
3.43
3.47
2.84
2.88
3.41
3.50
4.00
3.52
4.02
3.72
3.75
3.09
2.99
3.18
2.43

3.73
2.32
2.57
2.71
2.86
2.35
2.98
2.66
2.71
2.17
2.26
1.85
1.89
2.26
2.20
2.67
2.43
2.39
2.45
2.32
2.06
1.86
2.14
1.49

2.05
1.33
1.30
1.44
1.59
1.22
1.65
1.46
1.63
1.17
1.24
1.00
1.04
1.30
1.14
1.48
1.39
1.24
1.42
1.27
1.06
0.99
1.27
0.83

1.83
0.67
1.70
1.56
1.22
1.80
0.73
0.55
1.36
1.11
0.78
0.79
0.59
0.94
1.64
0.84
1.91
1.83
0.80
1.97
1.86
0.62
1.93
1.27

299

Depth to
Stiff
Layer (in)

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

2-Layer Backcalculated
Resilient Modulus (ksi)
AC

313.56
398.07
427.96
319.85
335.6
358.09
317.63
409.45
338.71
314.39
332.44
345.35
391
320.2
291.72
347.96
312
424
369
323
362
375
327
299

Granular Roadbed

31.399
45.49
29.826
32.76
37.808
35.655
33.296
32.924
45.526
34.442
38.5
44.943
46.02
42.157
33.806
36.229
45
26
41
35
40
37
46
46

16.968
26.652
26.161
23.958
22.029
28.015
21.225
24.031
22.115
29.564
28.093
34.528
33.58
27.367
29.642
23.673
26
28
25
27
32
35
28
42

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)

8

12

18

24

36

60

RMS
Error
(%)

10.57
9.44
9.61
9.72
9.18
9.12
9.55
9.65
8.99
9.47
9.79
10.72
9.80
10.60
9.15
9.05
9.13
8.58
10.69
9.52
9.69
9.81
9.25
9.20

7.43
6.73
6.79
7.25
6.83
6.98
7.11
7.30
6.64
7.27
7.48
7.94
7.30
7.54
6.52
6.72
6.89
6.01
7.51
6.79
6.83
7.32
6.88
7.05

5.82
5.34
5.30
5.90
5.51
5.72
5.64
5.82
5.28
5.80
5.76
6.69
6.07
6.10
5.24
5.43
5.55
4.59
5.88
5.39
5.34
5.96
5.56
5.78

4.30
4.04
3.90
4.39
4.20
4.45
4.16
4.33
3.87
4.38
4.51
5.29
4.74
4.75
4.05
3.98
4.14
3.32
4.35
4.07
3.93
4.43
4.23
4.48

3.29
3.13
3.09
3.48
3.32
3.58
3.20
3.32
3.00
3.42
3.59
4.09
3.79
3.79
3.10
3.04
3.23
2.48
3.33
3.15
3.11
3.51
3.34
3.62

2.15
2.05
1.98
2.23
2.22
2.49
2.02
2.05
1.91
2.20
2.48
2.43
2.50
2.35
2.07
1.89
2.17
1.51
2.17
2.07
1.99
2.25
2.23
2.51

1.13
1.06
1.03
1.12
1.19
1.50
1.01
0.98
1.00
1.09
1.42
1.26
1.46
1.29
1.07
1.00
1.29
0.85
1.14
1.07
1.04
1.13
1.20
1.51

1.29
1.68
1.83
1.74
1.14
1.15
1.64
1.65
1.14
1.81
1.88
1.83
0.87
1.97
1.83
0.62
1.92
1.32
1.33
1.69
1.81
1.75
1.11
1.13

300

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

268
329
300
381
374
358
366
400
360
409
313
425
367
323
362
374
328
298
268
329
298
381
373
359

Granular Roadbed

36
39
40
33
40
49
33
29
38
32
45
26
41
35
41
37
46
46
36
40
40
33
40
49

30
32
33
30
29
24
33
34
34
31
26
28
25
27
32
35
28
42
30
32
33
30
29
24

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994

8

12

18

24

36

60

RMS
Error
(%)

9.65
9.73
9.08
9.55
7.64
8.39
8.62
8.82
7.44
8.78
8.46
8.39
6.46
7.56
8.94
8.98
8.31
7.91
7.95
8.78
7.80
8.98
17.24
13.09

7.19
7.36
6.71
7.33
6.14
6.42
6.65
6.77
5.71
6.69
6.61
6.38
5.31
5.75
6.69
6.69
6.50
6.02
5.94
6.42
5.94
6.69
12.70
9.84

5.70
5.86
5.33
5.85
5.31
5.55
5.79
5.75
5.04
5.71
5.63
5.55
4.61
5.04
5.35
5.55
5.35
5.20
5.04
5.28
5.00
5.51
9.70
7.47

4.20
4.36
3.91
4.42
4.37
4.57
4.72
4.69
4.29
4.61
4.69
4.61
3.94
4.17
4.25
4.41
4.17
4.17
4.06
4.17
4.06
4.21
6.65
5.04

3.23
3.34
3.04
3.44
3.46
3.66
3.78
3.74
3.43
3.62
3.62
3.62
3.15
3.23
3.19
3.43
3.11
3.19
3.15
3.19
3.11
3.23
4.93
3.84

2.04
2.06
1.93
2.21
2.36
2.40
2.56
2.48
2.32
2.36
2.40
2.36
2.17
2.17
2.05
2.17
2.05
1.97
2.01
2.05
2.01
2.05
3.09
2.53

1.02
0.99
1.01
1.10
1.38
1.42
1.50
1.50
1.30
1.26
1.30
1.30
1.22
1.18
1.14
1.14
1.10
1.06
1.14
1.14
1.14
1.14
1.69
1.46

1.65
1.67
1.14
1.78
1.19
1.74
1.10
1.60
1.97
0.94
1.30
1.72
1.16
1.66
1.49
1.02
1.57
1.81
1.60
1.10
1.58
0.99
1.01
1.17

301

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

365
400
361
409
614
510
499
433
706
497
551
560
902
618
356
428
433
537
474
372
491
360
1,305
1,438

Granular Roadbed

33
29
38
32
42
41
40
42
41
34
34
35
43
39
38
34
37
35
41
39
41
37
25
37

33
34
34
31
27
26
24
25
28
28
28
28
30
30
31
31
32
34
32
31
32
31
21
25

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994

8

12

18

24

36

60

RMS
Error
(%)

12.98
11.49
10.56
10.37
11.04
11.48
9.87
11.10
10.38
9.27
9.59
11.81
9.63
9.13
9.29
11.09
9.64
10.59
9.86
11.88
8.65
13.77
9.38
10.55

9.82
9.00
8.51
8.36
8.72
8.90
7.51
8.71
7.86
7.33
7.56
9.33
6.88
7.38
7.26
8.91
7.54
8.28
8.10
9.86
6.61
11.03
7.38
8.15

7.48
7.13
6.88
6.74
6.83
6.90
5.73
6.75
5.86
5.85
6.10
7.55
5.19
5.81
5.62
6.94
5.81
6.43
6.42
7.95
5.37
9.26
5.83
6.24

5.25
5.03
4.98
4.82
4.83
4.72
3.90
4.70
4.08
4.25
4.37
5.45
3.59
4.02
3.98
4.97
4.12
4.55
4.66
5.80
3.81
7.13
4.09
4.40

4.05
3.83
3.89
3.74
3.70
3.37
2.84
3.57
3.07
3.23
3.32
4.16
2.63
2.96
3.04
3.73
3.08
3.42
3.55
4.47
2.84
5.59
3.12
3.34

2.61
2.41
2.54
2.42
2.43
1.88
1.73
2.37
1.98
2.08
2.17
2.54
1.63
1.83
2.05
2.40
1.98
2.20
2.40
2.98
1.70
3.61
2.00
2.20

1.43
1.26
1.43
1.31
1.42
0.95
0.95
1.41
1.15
1.21
1.27
1.35
0.89
1.01
1.18
1.35
1.10
1.25
1.48
1.80
0.94
1.88
1.16
1.29

1.76
1.87
0.98
1.43
1.03
1.05
0.79
1.44
1.08
0.65
0.64
1.11
1.42
1.27
1.04
1.01
0.97
0.77
2.00
1.66
0.85
1.79
0.96
0.97

302

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

1,801
2,830
3,254
3,423
2,318
2,864
2,506
2,028
1,919
3,221
2,978
3,223
2,163
3,317
2,521
2,618
2,750
2,454
2,711
2,664
3,736
3,852
2,843
2,056

Granular Roadbed

35
33
39
37
41
29
41
42
45
45
44
30
46
41
49
36
43
40
46
36
43
24
45
44

24
27
25
27
25
35
37
26
31
29
28
25
39
35
30
26
32
28
25
20
37
18
31
27

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994

8

12

18

24

36

60

RMS
Error
(%)

9.87
9.69
9.25
9.33
8.34
10.29
12.36
9.91
9.81
10.23
9.26
8.86
9.85
10.30
9.69
9.79
10.88
10.88
10.10
10.54
11.10
10.28
9.99
11.54

6.75
6.83
6.86
7.27
6.30
7.13
8.86
7.60
7.79
7.78
6.83
6.75
7.92
8.09
7.46
7.41
8.01
8.29
7.75
8.01
8.05
8.23
7.58
8.96

5.11
5.13
5.27
5.81
5.03
5.18
6.40
5.95
6.26
6.09
5.22
5.44
6.53
6.50
5.82
5.79
5.95
6.35
6.06
6.09
6.25
6.64
5.84
6.94

3.53
3.53
3.69
4.19
3.66
3.46
4.21
4.26
4.68
4.42
3.57
3.96
4.89
4.65
4.02
4.07
4.25
4.56
4.30
4.47
4.40
4.85
4.22
5.02

2.66
2.60
2.76
3.23
2.83
2.56
3.11
3.28
3.69
3.41
2.65
2.96
3.82
3.52
2.93
3.06
3.32
3.57
3.26
3.54
3.39
3.83
3.17
3.78

1.66
1.61
1.74
2.13
1.88
1.61
1.97
2.11
2.56
2.16
1.66
1.84
2.50
2.16
1.78
1.91
2.29
2.47
2.09
2.34
2.15
2.39
2.18
2.34

0.94
0.89
1.02
1.27
1.09
0.91
1.16
1.16
1.57
1.17
0.93
1.04
1.42
1.08
0.94
1.06
1.33
1.49
1.20
1.44
1.25
1.28
1.28
1.28

1.93
1.45
0.92
0.70
0.80
0.99
1.29
1.49
0.56
1.91
0.78
0.87
0.55
2.00
1.14
0.86
1.25
0.88
0.54
1.58
1.29
1.74
0.65
1.29

303

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

1,767
1,952
2,299
2,824
3,068
1,440
1,181
2,911
2,803
2,936
2,359
3,572
3,995
3,854
3,034
2,727
1,487
1,755
2,512
1,930
1,923
3,961
2,117
2,683

Granular Roadbed

49
46
48
48
55
47
40
43
51
41
47
46
41
33
38
42
49
48
43
49
43
36
50
34

37
38
35
28
32
38
31
31
23
30
38
34
25
31
36
33
27
24
29
25
29
27
28
27

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995

8

12

18

24

36

60

RMS
Error
(%)

11.25
10.36
10.36
10.79
11.02
10.71
11.48
11.15
9.58
9.87
10.12
10.37
12.38
11.82
10.85
10.46
11.40
10.47
11.46
11.50
11.51
11.29
11.04
10.02

8.05
7.84
7.57
7.74
8.10
8.01
8.92
8.34
7.07
7.31
7.49
7.45
9.66
9.10
8.21
7.79
9.31
8.30
9.11
8.99
9.10
8.69
8.50
7.86

6.03
6.07
5.83
5.83
6.20
6.18
7.01
6.45
5.55
5.64
5.74
5.43
7.70
6.99
6.31
5.94
7.58
6.76
7.43
7.23
7.29
6.99
6.78
6.43

4.24
4.21
4.09
3.89
4.31
4.48
5.15
4.71
3.96
4.02
4.15
3.47
5.49
4.96
4.36
4.15
5.64
4.97
5.49
5.23
5.32
5.09
4.89
4.71

3.21
3.13
3.04
2.80
3.19
3.41
3.98
3.64
3.02
3.09
3.18
2.44
4.07
3.75
3.27
3.12
4.37
3.77
4.18
3.96
3.93
3.83
3.67
3.59

2.09
1.91
1.96
1.64
2.02
2.20
2.64
2.38
1.96
2.05
2.15
1.39
2.48
2.49
2.13
2.04
2.72
2.26
2.56
2.34
2.28
2.35
2.18
2.16

1.19
1.02
1.11
0.92
1.20
1.21
1.46
1.34
1.12
1.18
1.28
0.73
1.30
1.40
1.22
1.16
1.43
1.11
1.27
1.20
1.12
1.31
1.16
1.09

1.14
1.39
0.68
1.00
0.97
1.75
1.54
1.58
0.96
0.80
0.56
1.46
1.11
0.98
0.65
0.59
1.18
1.91
1.89
1.57
1.52
0.94
1.37
1.72

304

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

1,594
2,673
2,056
1,907
1,826
2,403
2,528
2,214
2,457
2,143
1,889
2,041
3,001
2,085
2,078
2,099
4,183
4,797
4,359
3,702
4,033
3,138
3,405
4,689

Granular Roadbed

44
38
44
39
42
41
37
41
48
49
51
40
30
40
44
47
31
30
29
30
28
36
34
34

30
34
32
38
30
29
24
26
31
30
28
49
28
26
31
32
25
32
28
30
32
28
31
33

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994

8

12

18

24

36

60

RMS
Error
(%)

10.47
11.02
10.14
12.83
13.09
12.98
11.49
10.56
10.37
11.04
11.48
9.87
11.10
10.75
10.38
9.83
9.65
9.27
9.59
11.81
9.09
9.63
9.63
9.13

7.71
8.59
7.88
10.32
9.84
9.82
9.00
8.51
8.36
8.72
8.90
7.51
8.71
8.44
7.86
7.96
7.70
7.33
7.56
9.33
7.06
7.51
6.88
7.38

5.80
6.81
6.18
8.40
7.47
7.48
7.13
6.88
6.74
6.83
6.90
5.73
6.75
6.58
5.86
6.50
6.27
5.85
6.10
7.55
5.74
6.02
5.19
5.81

3.92
4.77
4.33
6.11
5.04
5.25
5.03
4.98
4.82
4.83
4.72
3.90
4.70
4.72
4.08
4.81
4.48
4.25
4.37
5.45
4.17
4.37
3.59
4.02

2.88
3.46
3.15
4.51
3.84
4.05
3.83
3.89
3.74
3.70
3.37
2.84
3.57
3.56
3.07
3.66
3.42
3.23
3.32
4.16
3.08
3.37
2.63
2.96

1.75
1.88
1.85
2.63
2.53
2.61
2.41
2.54
2.42
2.43
1.88
1.73
2.37
2.33
1.98
2.31
2.11
2.08
2.17
2.54
1.87
2.26
1.63
1.83

0.92
0.91
0.93
1.21
1.46
1.43
1.26
1.43
1.31
1.42
0.95
0.95
1.41
1.42
1.15
1.28
1.10
1.21
1.27
1.35
0.93
1.43
0.89
1.01

1.87
1.40
1.45
1.86
1.17
1.76
1.87
0.98
1.43
1.03
1.05
0.79
1.44
1.52
1.08
0.30
1.24
0.65
0.64
1.11
1.75
1.62
1.42
1.27

305

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

2,378
3,825
3,652
4,204
1,448
1,802
2,830
3,254
3,423
2,318
2,865
2,506
2,028
2,255
1,919
4,018
4,066
3,221
2,978
3,223
4,593
2,548
2,163
3,317

Granular Roadbed

40
28
35
22
37
35
33
39
37
41
29
41
42
43
45
37
36
45
44
30
36
51
46
41

39
38
38
29
25
24
27
25
27
25
35
37
26
26
31
28
31
29
28
25
36
26
39
35

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)

8

12

18

24

36

60

RMS
Error
(%)

9.29
11.09
9.64
10.59
9.86
11.88
8.65
13.77
9.38
10.55
9.87
9.59
8.60
8.89
10.18
8.45
8.15
10.72
8.23
12.61
12.53
11.06
10.21
10.04

7.26
8.91
7.54
8.28
8.10
9.86
6.61
11.03
7.38
8.15
6.76
6.85
6.86
7.04
7.78
6.62
5.67
7.73
5.62
9.48
9.48
8.67
8.23
8.09

5.62
6.94
5.81
6.43
6.42
7.95
5.37
9.26
5.83
6.24
5.12
5.13
5.53
5.64
6.15
5.43
4.25
5.74
4.15
7.20
7.22
6.86
6.65
6.52

3.98
4.97
4.12
4.55
4.66
5.80
3.81
7.13
4.09
4.40
3.51
3.50
4.06
4.04
4.51
4.06
2.86
4.08
2.85
4.86
5.06
4.84
4.81
4.67

3.04
3.73
3.08
3.42
3.55
4.47
2.84
5.59
3.12
3.34
2.64
2.56
3.16
3.13
3.45
3.18
2.12
3.19
2.10
3.71
3.91
3.69
3.77
3.62

2.05
2.40
1.98
2.20
2.40
2.98
1.70
3.61
2.00
2.20
1.64
1.58
2.11
2.04
2.35
2.17
1.28
2.21
1.30
2.44
2.52
2.32
2.46
2.34

1.18
1.35
1.10
1.25
1.48
1.80
0.94
1.88
1.16
1.29
0.95
0.88
1.31
1.19
1.45
1.26
0.75
1.35
0.75
1.41
1.38
1.21
1.39
1.27

1.04
1.01
0.97
0.77
2.00
1.66
0.85
1.79
0.96
0.97
1.62
1.01
1.30
0.81
1.03
0.61
1.72
0.90
1.61
1.17
1.82
1.86
0.98
1.39

306

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

2,521
2,618
2,750
2,454
2,711
2,664
3,736
3,852
2,843
2,056
1,705
1,972
3,222
3,139
2,156
3,787
2,086
1,226
1,899
1,450
1,808
2,828
3,254
3,407

Granular Roadbed

49
36
43
40
46
36
43
24
45
44
49
46
54
47
49
53
57
52
59
37
35
33
39
37

30
26
32
28
25
20
37
18
31
27
37
39
28
29
25
28
47
26
47
25
24
27
25
27

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)

8

12

18

24

36

60

RMS
Error
(%)

10.69
11.11
9.56
10.76
10.44
10.09
9.56
9.41
9.05
9.42
11.59
8.82
9.30
9.34
8.89
9.07
10.88
9.42
10.41
11.70
9.41
8.51
13.54
9.21

8.44
8.61
7.27
8.45
8.20
7.64
7.75
7.51
7.16
7.43
9.16
6.85
7.25
6.68
7.18
7.09
8.73
7.37
8.14
9.71
7.50
6.50
10.85
7.25

6.61
6.68
5.55
6.54
6.39
5.70
6.33
6.12
5.71
5.99
7.41
5.57
5.81
5.04
5.66
5.49
6.80
5.67
6.32
7.83
5.77
5.28
9.10
5.72

4.67
4.56
3.78
4.56
4.58
3.97
4.68
4.36
4.15
4.29
5.34
4.05
4.22
3.48
3.92
3.88
4.88
4.02
4.47
5.72
3.95
3.74
7.01
4.02

3.58
3.26
2.76
3.46
3.46
2.99
3.56
3.33
3.15
3.26
4.08
2.99
3.25
2.55
2.88
2.97
3.66
3.01
3.36
4.40
2.93
2.79
5.50
3.06

2.36
1.82
1.68
2.30
2.26
1.93
2.25
2.06
2.03
2.13
2.49
1.82
2.19
1.58
1.78
2.00
2.35
1.94
2.16
2.93
1.83
1.68
3.55
1.96

1.38
0.92
0.92
1.37
1.38
1.12
1.25
1.07
1.18
1.25
1.32
0.90
1.38
0.87
0.98
1.15
1.33
1.08
1.23
1.77
1.09
0.93
1.85
1.14

1.04
1.02
0.78
1.46
1.52
1.08
0.30
1.32
0.64
0.68
1.12
1.81
1.59
1.41
1.26
1.05
1.00
0.97
0.78
1.66
1.99
0.86
1.79
0.95

307

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

2,309
2,854
2,517
2,025
2,255
1,913
4,017
4,084
3,216
2,965
3,228
4,615
2,548
2,170
3,323
2,535
2,624
2,740
2,448
2,675
2,506
3,736
3,852
2,844

Granular Roadbed

41
29
40
42
43
45
37
36
45
44
30
36
51
46
41
49
36
43
40
36
43
43
24
45

25
35
37
26
26
31
28
31
29
28
25
36
26
39
35
30
26
32
28
20
32
37
18
31

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)

8

12

18

24

36

60

RMS
Error
(%)

10.38
9.72
9.47
8.45
10.79
9.00
9.97
8.31
8.02
10.70
9.86
8.11
10.58
10.26
8.14
9.60
9.89
9.59
10.23
11.72
9.24
10.34
9.53
9.69

8.02
6.67
6.76
6.74
7.91
7.13
7.62
6.51
5.57
7.71
6.78
5.54
8.53
8.17
6.33
7.76
7.65
7.71
7.73
8.82
7.28
7.98
7.24
7.42

6.14
5.04
5.07
5.44
5.92
5.72
6.03
5.34
4.18
5.73
5.01
4.09
6.95
6.62
4.97
6.41
6.03
6.13
6.02
6.68
5.72
6.22
5.83
5.75

4.33
3.46
3.45
3.99
4.22
4.09
4.42
4.00
2.81
4.07
3.50
2.81
5.24
4.85
3.55
4.79
4.24
4.24
4.23
4.78
4.17
4.39
4.18
4.16

3.29
2.60
2.53
3.11
3.26
3.17
3.38
3.13
2.09
3.18
2.64
2.07
4.17
3.75
2.56
3.75
3.22
3.10
3.24
3.71
3.27
3.35
3.02
3.19

2.17
1.62
1.56
2.08
2.31
2.07
2.30
2.13
1.26
2.21
1.74
1.28
2.87
2.38
1.53
2.45
2.12
1.85
2.16
2.57
2.28
2.17
1.88
2.09

1.27
0.93
0.87
1.28
1.47
1.21
1.42
1.24
0.74
1.35
1.10
0.74
1.71
1.29
0.87
1.40
1.18
0.97
1.36
1.50
1.44
1.25
1.15
1.22

0.96
1.59
1.03
1.25
1.98
0.82
1.05
0.58
1.72
0.92
1.98
1.63
0.97
1.80
0.56
1.00
1.77
1.54
0.86
1.74
0.88
1.21
1.26
1.35

308

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

2,061
1,701
1,965
3,222
1,216
3,133
2,157
3,782
2,073
1,223
1,214
1,898
3,462
4,080
4,017
4,477
2,974
3,910
2,065
1,735
2,566
2,612
3,031
2,797

Granular Roadbed

44
49
46
54
53
47
49
53
57
52
56
59
41
34
44
38
41
32
47
41
53
40
41
44

27
37
39
28
25
29
25
28
47
26
33
47
24
31
46
29
33
40
31
27
29
32
36
33

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)

8

12

18

24

36

60

RMS
Error
(%)

10.71
9.69
25.11
7.92
11.22
9.50
10.49
8.75
10.24
10.17
11.48
11.67
10.22
11.18
10.73
9.65
9.62
10.21
10.08
10.17
9.91
7.84
9.29
9.99

8.47
7.29
14.76
5.76
7.89
7.87
8.41
7.02
7.87
7.47
9.39
8.09
7.54
8.03
8.28
7.03
7.26
7.40
7.68
8.21
7.90
6.10
7.50
8.06

6.81
5.72
9.35
4.55
5.94
6.44
6.81
5.89
6.02
5.64
7.47
5.94
5.85
5.92
6.80
5.51
5.65
5.57
6.15
6.68
6.39
4.79
6.20
6.58

4.86
4.14
5.66
3.08
4.03
4.62
5.03
4.33
4.32
4.03
5.40
4.26
4.19
3.95
5.06
3.98
4.02
3.98
4.48
5.04
4.68
3.42
4.64
4.95

3.81
3.15
3.98
2.17
3.09
3.84
3.88
3.30
3.32
3.03
4.05
3.26
3.17
2.82
3.98
3.03
3.07
3.11
3.37
4.01
3.62
2.46
3.62
3.91

2.65
2.22
2.49
1.45
2.02
2.58
2.47
2.14
2.25
2.17
2.42
2.21
2.13
1.74
2.61
1.95
2.00
2.12
2.20
2.76
2.30
1.47
2.37
2.59

1.71
1.42
1.48
0.88
1.30
1.60
1.46
1.28
1.44
1.36
1.25
1.33
1.24
1.05
1.48
1.14
1.13
1.31
1.23
1.65
1.25
0.84
1.36
1.40

1.41
0.90
0.91
1.51
1.53
1.99
0.63
0.61
1.24
1.04
1.63
1.52
1.26
0.82
1.85
1.77
1.86
0.93
1.73
0.50
1.10
1.09
0.40
1.71

309

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

2,261
1,997
231
2,570
1,315
3,609
3,564
4,410
2,017
1,537
3,863
1,227
2,227
1,608
3,531
2,656
2,799
1,648
3,228
3,132
3,710
3,676
4,111
4,111

Granular Roadbed

46
53
22
57
47
47
36
44
48
54
26
46
45
40
37
45
44
52
39
45
37
47
42
37

24
29
26
47
32
26
28
32
29
31
31
30
32
39
27
35
35
32
32
21
27
41
26
24

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)

8

12

18

24

36

60

RMS
Error
(%)

9.58
9.37
9.35
9.95
11.63
11.46
9.04
10.12
9.49
9.50
10.16
8.49
9.77
9.49
11.17
11.33
10.16
9.97
10.32
10.84
10.40
11.05
11.76
9.47

7.41
7.53
7.07
7.52
8.06
8.63
7.12
7.81
7.27
7.14
8.15
6.81
7.17
7.58
9.14
7.85
7.79
7.36
7.39
7.79
8.03
8.74
8.85
6.90

5.84
5.99
5.56
5.85
5.67
6.53
5.60
6.09
5.63
5.61
6.60
5.71
5.42
6.06
7.27
5.76
6.02
5.71
5.63
5.74
6.59
6.92
6.84
5.41

4.11
4.14
3.90
4.11
3.99
4.67
4.08
4.30
4.08
4.06
4.88
4.20
3.87
4.42
5.26
4.13
4.11
4.09
3.76
3.83
4.91
5.11
4.98
3.90

3.11
3.03
2.90
3.15
3.11
3.63
3.21
3.27
3.13
3.09
3.75
3.20
2.91
3.33
3.94
3.16
3.02
3.10
2.70
2.74
3.86
3.94
3.86
2.98

2.06
1.81
1.73
2.10
2.20
2.51
2.24
2.13
2.04
2.18
2.39
2.07
2.09
2.07
2.36
2.14
1.77
2.08
1.56
1.69
2.53
2.63
2.54
1.91

1.15
0.95
0.89
1.32
1.28
1.47
1.41
1.22
1.19
1.39
1.41
1.24
1.31
1.04
1.22
1.29
0.89
1.21
0.82
1.02
1.44
1.46
1.40
1.12

0.96
1.02
1.91
1.75
1.39
0.98
1.46
0.68
0.77
1.88
0.90
1.29
1.88
1.86
1.08
1.05
1.97
0.35
1.62
1.87
1.24
1.23
1.90
1.25

310

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

2,660
3,560
3,386
1,880
821
1,561
2,355
2,379
2,521
1,797
3,259
4,071
1,368
4,183
3,543
1,079
2,963
2,001
2,257
1,465
3,205
2,769
2,156
2,347

Granular Roadbed

44
35
38
50
50
44
57
43
47
57
39
47
57
35
28
49
34
48
37
42
40
38
37
49

30
35
37
27
27
24
26
28
29
26
25
28
28
32
27
27
37
29
40
35
24
23
24
31

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008

8

12

18

24

36

60

RMS
Error
(%)

9.35
9.85
9.78
9.71
9.41
9.27
11.12
10.20
9.44
9.89
9.85
10.01
8.91
11.07
5.55
5.20
6.30
6.15
5.87
5.62
6.07
6.24
6.08
6.11

7.06
7.14
7.45
8.07
7.84
7.64
9.41
8.76
7.94
8.44
8.24
8.81
7.45
9.63
4.69
4.34
5.40
5.29
5.01
4.83
5.29
5.42
5.33
5.36

5.49
5.37
5.97
7.09
6.94
6.68
8.30
7.75
7.11
7.47
7.35
7.99
6.53
8.59
4.28
3.90
5.00
4.88
4.60
4.46
4.88
5.03
4.95
4.97

3.91
3.84
4.35
5.71
5.63
5.39
6.74
6.42
5.90
6.11
6.00
6.79
5.28
7.21
3.72
3.34
4.38
4.27
4.00
3.84
4.28
4.36
4.37
4.42

2.98
3.00
3.27
4.61
4.63
4.37
5.50
5.33
4.83
4.97
4.95
5.80
4.21
6.02
3.19
2.85
3.82
3.71
3.43
3.25
3.72
3.75
3.84
3.87

1.95
2.04
2.13
3.06
3.13
2.89
3.66
3.64
3.25
3.26
3.38
4.13
2.63
4.24
2.35
2.04
2.87
2.78
2.46
2.29
2.81
2.75
2.88
2.96

1.10
1.26
1.19
1.67
1.77
1.50
1.93
1.99
1.67
1.60
1.90
2.32
1.19
2.41
1.31
1.12
1.77
1.68
1.31
1.16
1.65
1.55
1.73
1.82

0.91
1.04
0.89
0.50
0.65
1.04
0.49
0.48
1.02
0.62
0.71
0.47
0.99
0.23
1.68
1.70
1.27
1.15
1.58
1.27
1.06
1.02
1.05
0.97

311

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
300
300
300
300
300
300
300
300
300
300

2,522
1,478
2,934
1,408
1,485
1,579
1,445
1,713
1,972
1,867
1,525
2,288
1,992
1,646
3,872
3,578
3,271
3,415
4,348
4,783
4,060
3,989
4,366
4,191

Granular Roadbed

47
55
42
31
35
30
24
27
25
22
32
26
21
27
64
69
72
70
46
39
62
51
62
68

31
28
29
22
21
25
19
19
22
23
20
16
31
16
23
27
17
18
24
28
18
20
18
16

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008

8

12

18

24

36

60

RMS
Error
(%)

10.82
10.50
10.30
10.05
9.73
10.65
10.51
9.43
9.23
10.43
10.18
13.12
9.13
9.36
8.84
10.60
11.74
10.85
11.31
11.33
11.65
10.88
12.13
13.68

9.32
8.91
8.76
8.48
8.13
9.21
9.10
7.99
7.88
8.97
7.35
9.84
6.78
6.93
6.32
7.54
9.26
8.31
8.52
8.45
9.83
8.62
9.38
10.57

8.19
7.81
7.74
7.52
7.19
8.26
8.15
7.08
7.03
7.96
6.13
7.98
5.64
5.76
5.19
5.92
7.71
6.86
7.06
7.16
8.51
7.26
7.74
8.54

6.58
6.29
6.35
6.17
5.77
6.87
6.85
5.80
5.84
6.56
4.87
6.10
4.52
4.53
4.10
4.26
5.94
5.06
5.45
5.66
7.06
5.88
5.96
6.52

5.19
5.01
5.11
5.05
4.67
5.66
5.68
4.70
4.83
5.38
3.96
4.83
3.75
3.65
3.30
3.19
4.69
3.85
4.24
4.58
5.78
4.75
4.65
5.08

3.15
3.16
3.30
3.42
3.05
3.88
3.92
3.10
3.26
3.61
2.80
3.23
2.73
2.51
2.35
1.88
3.11
2.48
2.76
3.14
4.08
3.27
2.98
3.25

1.38
1.43
1.64
1.85
1.56
2.13
2.14
1.57
1.71
1.82
1.62
1.82
1.70
1.48
1.42
0.93
1.71
1.46
1.57
1.82
2.38
1.81
1.59
1.79

0.23
0.85
0.63
0.74
0.83
0.38
0.53
0.75
0.88
0.74
1.91
1.44
1.48
1.89
1.90
1.99
0.46
1.83
0.68
1.16
0.42
1.20
0.68
0.70

312

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
200
200
200
200
200
200
700
700
700
700
700
700
700
700

2,138
2,197
2,204
2,047
2,045
2,198
2,377
2,361
2,649
2,340
1,272
1,123
1,245
1,525
1,160
1,431
480
397
427
444
719
605
463
355

Granular Roadbed

16
18
22
28
26
25
25
25
26
21
65
42
79
66
79
42
30
36
34
39
30
33
27
26

26
25
22
20
23
17
17
23
22
20
14
13
14
16
17
25
21
25
23
20
15
20
22
20

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-Su-I75-CS49025-05-22-2008
flex-Su-I75-CS49025-05-22-2008
flex-Su-I75-CS49025-05-22-2008
flex-Su-I75-CS49025-05-22-2008
flex-B-M57-CS29022-08-30-1994

8

12

18

24

36

60

RMS
Error
(%)

15.08
12.18
7.18
7.38
5.71
6.08
5.64
5.72
6.60
7.13
8.75
9.31
6.71
8.27
7.70
7.36
7.42
8.91
12.32
6.45
5.96
5.94
6.39
19.95

11.85
9.61
5.78
6.03
4.70
4.91
4.62
4.61
5.43
5.72
7.36
7.87
5.65
7.20
6.10
6.29
6.39
6.19
9.36
4.78
4.42
4.52
4.81
14.23

9.65
8.25
5.10
5.35
4.30
4.35
4.13
4.13
4.80
5.00
6.47
7.16
5.13
6.64
5.43
5.78
5.83
4.83
7.73
3.94
3.69
3.74
4.07
10.17

7.26
6.59
4.22
4.55
3.77
3.69
3.49
3.45
3.99
4.03
5.26
6.21
4.56
5.88
4.63
5.05
5.09
3.36
6.01
2.91
2.72
2.82
3.07
6.24

5.54
5.31
3.50
3.85
3.26
3.12
2.98
2.86
3.32
3.23
4.19
5.34
3.95
5.11
3.96
4.35
4.39
2.44
4.78
2.09
1.95
2.03
2.28
4.18

3.41
3.63
2.47
2.80
2.52
2.30
2.19
2.04
2.33
2.13
2.61
4.00
2.98
3.81
2.93
3.23
3.14
1.37
3.12
0.99
0.95
1.07
1.22
2.21

1.73
2.05
1.41
1.63
1.54
1.31
1.26
1.15
1.18
1.08
1.06
2.40
1.80
2.14
1.68
1.86
1.56
0.62
1.54
0.21
0.24
0.38
0.44
1.13

0.65
0.64
1.18
1.48
1.95
1.88
1.64
1.52
1.93
1.31
1.09
1.05
1.57
1.21
1.81
1.19
1.58
1.96
1.01
1.72
1.18
1.32
1.43
2.00

313

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
300
300
300
300
300
300
300
300
150
150
150
150
150
150
150
150
150
150
150
150
700

371
529
1,156
1,694
2,685
2,053
2,406
2,212
2,463
1,755
2,135
1,851
2,798
3,609
1,475
3,078
4,341
563
609
836
862
726
713
194

Granular Roadbed

19
30
49
64
94
77
81
74
48
46
20
63
89
52
82
67
42
50
40
26
31
43
40
18

20
17
26
18
19
22
24
26
25
28
28
7
9
8
10
9
12
30
12
68
66
47
41
29

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994

8

12

18

24

36

60

RMS
Error
(%)

16.78
13.63
19.29
20.53
14.95
12.44
17.00
19.76
18.16
21.87
16.91
18.57
17.71
16.08
19.79
17.66
19.92
17.87
16.50
17.65
18.88
16.80
13.71
19.14

11.52
9.51
13.78
15.36
10.61
8.86
12.00
14.50
13.22
15.14
12.08
12.95
12.58
11.41
14.37
12.90
14.70
12.99
11.40
12.08
12.62
11.54
9.69
13.91

8.33
7.10
9.96
11.74
7.81
6.71
8.80
11.03
9.71
10.80
9.06
9.54
9.33
8.43
10.89
9.88
11.30
9.73
8.33
8.88
9.05
8.20
7.26
10.60

5.29
4.72
6.49
8.14
5.13
4.56
5.92
7.62
6.47
6.77
6.11
6.28
6.17
5.69
7.65
7.11
7.72
6.47
5.67
5.89
5.80
5.18
4.90
7.27

3.75
3.42
4.62
6.04
3.73
3.37
4.38
5.63
4.85
4.58
4.43
4.49
4.46
4.17
5.71
5.46
5.69
4.67
4.16
4.21
4.06
3.64
3.58
5.41

2.15
2.07
2.69
3.57
2.22
2.05
2.77
3.37
3.04
2.57
2.52
2.64
2.62
2.50
3.55
3.55
3.28
2.75
2.46
2.49
2.35
2.06
2.17
3.31

1.18
1.15
1.36
1.76
1.25
1.16
1.53
1.74
1.67
1.30
1.24
1.43
1.37
1.34
1.92
1.93
1.70
1.48
1.29
1.29
1.30
1.10
1.27
1.73

1.53
1.00
1.97
1.97
1.79
1.06
1.44
1.37
1.99
1.62
1.84
1.01
1.31
1.19
1.04
1.38
1.08
1.28
1.64
1.14
1.24
1.57
1.82
1.35

314

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

208
282
215
282
254
336
214
258
212
167
296
206
242
258
237
274
270
245
247
221
169
206
278
252

Granular Roadbed

25
31
20
17
28
34
26
19
24
17
21
22
22
25
21
25
18
21
25
23
23
24
32
20

30
31
25
19
29
31
23
20
21
26
27
24
25
26
18
18
20
24
26
26
27
31
29
20

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)

8

12

18

24

36

60

RMS
Error
(%)

13.88
19.78
16.68
14.59
14.95
16.20
15.76
18.95
11.91
12.36
12.20
12.23
11.37
13.61
10.44
11.53
11.42
12.51
11.87
10.94
10.57
11.46
9.39
11.44

10.09
13.95
11.93
10.25
10.78
12.62
12.03
13.91
8.40
9.12
8.60
8.90
8.14
9.88
7.59
8.14
8.39
8.55
8.58
7.85
7.57
8.45
6.88
8.47

7.72
10.10
8.73
7.48
8.14
10.28
9.62
10.63
6.18
7.11
6.37
6.80
6.02
7.51
5.75
6.03
6.44
6.35
6.29
5.76
5.70
6.54
5.14
6.38

5.51
6.46
5.90
4.91
5.64
8.03
7.20
7.44
4.27
5.19
4.17
4.82
4.07
5.41
3.95
3.97
4.49
4.16
4.21
3.85
3.93
4.64
3.40
4.35

4.20
4.45
4.37
3.53
4.27
6.52
5.75
5.46
3.18
3.89
3.02
3.59
2.95
4.17
2.91
2.81
3.25
2.93
3.03
2.84
2.96
3.48
2.46
3.22

2.64
2.45
2.76
2.08
2.72
4.58
3.94
3.10
2.05
2.53
1.75
2.28
1.83
2.77
1.82
1.63
1.97
1.70
1.89
1.81
1.86
2.16
1.45
1.99

1.42
1.32
1.59
1.17
1.42
2.68
2.38
1.60
1.23
1.47
0.90
1.21
1.01
1.51
1.04
0.88
1.04
0.95
1.09
1.08
1.06
1.15
0.86
1.08

1.35
1.55
1.93
1.60
1.85
0.99
0.85
1.19
1.99
0.80
1.46
1.28
1.34
1.62
1.47
0.97
0.74
1.14
1.65
1.86
1.20
1.75
1.99
1.82

315

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

359
194
217
254
303
405
331
298
288
393
348
403
346
331
402
355
448
296
325
326
397
489
438
416

Granular Roadbed

30
19
28
29
28
29
30
18
41
36
32
33
38
33
41
34
33
33
33
39
38
30
40
32

25
26
23
31
24
13
15
21
30
25
38
29
35
24
35
40
33
37
36
37
37
33
46
35

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)

8

12

18

24

36

60

RMS
Error
(%)

10.38
12.57
12.50
12.34
21.48
19.81
19.90
19.31
15.43
17.30
19.87
22.28
17.86
15.45
21.82
17.48
19.21
15.44
12.50
11.49
11.02
12.00
9.81
11.99

7.42
9.77
9.39
8.31
15.35
14.52
13.38
13.74
11.08
12.13
12.61
14.58
12.29
10.68
13.96
11.19
13.37
10.27
9.03
8.25
7.89
8.85
7.18
8.88

5.60
7.73
7.12
5.96
11.30
11.02
9.54
10.13
8.11
9.00
8.63
10.31
8.86
7.67
9.80
8.02
9.55
7.30
6.62
6.05
5.94
6.85
5.37
6.69

3.92
5.61
5.06
4.00
7.54
7.81
5.95
6.43
5.46
5.84
5.27
6.24
5.71
5.24
6.11
5.33
6.45
4.81
4.44
4.04
4.10
4.86
3.55
4.56

2.92
4.28
3.89
2.98
5.46
5.82
4.15
4.53
4.08
4.15
3.64
4.31
4.11
3.82
4.27
3.93
4.76
3.43
3.19
2.98
3.08
3.64
2.57
3.37

1.97
2.84
2.58
1.98
3.21
3.67
2.46
2.64
2.65
2.42
2.21
2.49
2.44
2.37
2.65
2.65
2.92
2.09
1.99
1.90
1.94
2.26
1.51
2.09

1.20
1.56
1.62
1.20
1.74
2.00
1.32
1.46
1.59
1.39
1.25
1.33
1.31
1.29
1.51
1.57
1.62
1.16
1.15
1.13
1.11
1.21
0.90
1.13

1.41
1.69
1.96
1.72
1.54
1.72
1.89
1.67
1.99
1.16
1.72
1.90
1.93
1.99
1.43
1.25
1.96
1.31
1.66
1.85
1.19
1.74
2.00
1.85

316

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

348
492
333
224
200
252
163
202
223
220
122
135
202
236
118
141
187
207
325
326
396
489
437
417

Granular Roadbed

44
28
35
40
17
19
20
19
28
22
23
18
22
26
21
29
21
27
33
39
38
30
40
32

34
25
25
33
22
19
28
26
25
28
30
28
28
29
25
25
23
33
36
37
37
33
46
35

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)

8

12

18

24

36

60

RMS
Error
(%)

10.84
13.17
13.04
12.95
22.28
20.51
20.66
19.94
15.94
17.83
17.22
20.41
22.72
18.17
15.81
22.22
17.98
19.76
15.84
19.19
16.12
13.07
18.50
14.26

7.75
10.23
9.80
8.72
15.92
15.03
13.89
14.19
11.45
12.50
12.24
12.96
14.87
12.50
10.92
14.21
11.52
13.76
10.53
13.69
11.07
9.12
13.21
10.13

5.85
8.09
7.43
6.25
11.72
11.41
9.90
10.46
8.38
9.28
9.23
8.86
10.52
9.01
7.85
9.98
8.25
9.82
7.49
9.78
8.00
6.80
9.55
7.45

4.09
5.88
5.28
4.20
7.82
8.08
6.18
6.64
5.64
6.02
6.51
5.42
6.36
5.81
5.36
6.22
5.48
6.63
4.93
6.01
5.08
4.53
6.22
4.89

3.06
4.48
4.06
3.13
5.66
6.03
4.31
4.68
4.22
4.27
4.98
3.74
4.40
4.18
3.90
4.35
4.05
4.90
3.52
4.02
3.60
3.27
4.43
3.56

2.05
2.98
2.69
2.08
3.33
3.80
2.55
2.73
2.74
2.50
3.32
2.27
2.54
2.49
2.42
2.70
2.72
3.00
2.14
2.13
2.06
1.98
2.58
2.12

1.25
1.63
1.69
1.26
1.81
2.07
1.37
1.51
1.64
1.43
1.84
1.28
1.36
1.34
1.32
1.54
1.61
1.66
1.19
1.09
1.13
1.10
1.30
1.19

1.36
1.72
1.96
1.73
1.56
1.71
1.88
1.67
1.98
1.13
2.00
1.71
1.91
1.93
1.94
1.44
1.25
1.98
1.31
1.99
1.54
0.99
1.98
1.76

317

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

349
494
333
224
200
252
164
201
223
221
245
122
135
202
236
118
141
188
207
194
208
282
216
255

Granular Roadbed

44
28
35
40
17
19
20
19
28
22
26
23
18
22
26
21
29
21
27
18
25
31
20
28

34
25
25
33
22
19
28
26
25
28
21
31
28
28
29
25
25
24
33
29
30
31
25
29

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)

8

12

18

24

36

60

RMS
Error
(%)

11.95
16.31
19.18
17.53
21.17
16.29
17.98
17.02
15.51
19.13
16.99
19.34
17.29
16.00
17.11
18.33
16.21
13.14
18.42
13.35
19.19
15.90
14.04
14.45

8.51
11.52
14.07
12.76
14.66
11.63
12.55
12.08
11.01
13.89
12.41
14.28
12.57
11.05
11.71
12.25
11.13
9.28
13.38
9.71
13.53
11.37
9.86
10.42

6.44
8.45
10.71
9.37
10.45
8.73
9.24
8.97
8.14
10.53
9.51
10.97
9.41
8.07
8.61
8.79
7.91
6.95
10.20
7.42
9.80
8.33
7.20
7.87

4.38
5.69
7.40
6.25
6.55
5.89
6.08
5.92
5.49
7.40
6.84
7.50
6.26
5.50
5.71
5.63
5.00
4.69
7.00
5.30
6.27
5.62
4.72
5.45

3.24
4.21
5.47
4.68
4.43
4.27
4.35
4.28
4.03
5.52
5.26
5.52
4.52
4.04
4.08
3.94
3.51
3.43
5.21
4.04
4.31
4.16
3.39
4.13

1.97
2.66
3.27
2.93
2.48
2.43
2.55
2.52
2.42
3.43
3.41
3.19
2.66
2.38
2.41
2.28
1.99
2.08
3.18
2.54
2.37
2.64
2.00
2.63

1.11
1.47
1.69
1.61
1.26
1.20
1.39
1.31
1.30
1.85
1.86
1.65
1.43
1.25
1.25
1.26
1.06
1.22
1.67
1.37
1.28
1.52
1.12
1.37

1.05
1.45
1.35
2.00
1.60
1.87
1.02
1.30
1.19
1.03
1.37
1.10
1.29
1.60
1.13
1.23
1.56
1.87
1.32
1.35
1.54
1.93
1.61
1.89

318

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

336
215
258
212
167
297
206
242
258
237
274
271
245
247
221
169
206
279
252
359
195
217
254
304

Granular Roadbed

34
26
19
24
17
21
22
22
25
21
25
18
22
25
23
23
24
32
20
30
19
28
29
28

31
23
20
21
26
27
24
25
26
18
18
20
23
26
26
27
31
29
20
25
26
23
31
24

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993

8

12

18

24

36

60

RMS
Error
(%)

15.74
15.30
18.38
11.90
11.76
11.72
10.89
13.09
10.06
11.07
11.03
12.08
11.02
12.00
11.99
11.99
13.17
22.28
20.51
18.02
20.66
16.85
20.97
17.22

12.26
11.67
13.49
8.78
8.29
8.54
7.80
9.50
7.32
7.82
8.11
8.26
7.89
8.85
8.58
8.88
10.23
15.92
15.03
12.68
13.89
11.58
15.21
12.24

9.98
9.34
10.31
6.85
6.14
6.52
5.77
7.22
5.54
5.79
6.23
6.13
5.94
6.85
6.30
6.69
8.09
11.72
11.41
9.42
9.90
8.62
11.38
9.23

7.80
6.99
7.21
5.00
4.02
4.62
3.90
5.20
3.80
3.81
4.34
4.01
4.10
4.86
4.06
4.56
5.88
7.82
8.08
6.31
6.18
5.96
7.83
6.51

6.33
5.58
5.29
3.75
2.91
3.44
2.83
4.01
2.80
2.70
3.14
2.83
3.08
3.64
2.90
3.37
4.48
5.66
6.03
4.60
4.31
4.42
5.72
4.98

4.45
3.82
3.01
2.44
1.69
2.19
1.75
2.67
1.75
1.57
1.90
1.64
1.94
2.26
1.68
2.09
2.98
3.33
3.80
2.70
2.55
2.77
3.46
3.32

2.61
2.31
1.55
1.42
0.87
1.16
0.97
1.45
1.01
0.85
1.01
0.92
1.11
1.21
0.87
1.13
1.63
1.81
2.07
1.43
1.37
1.44
1.78
1.84

0.99
0.85
1.19
0.80
1.41
1.29
1.33
1.66
1.51
0.99
0.71
1.22
1.10
0.96
1.65
1.47
1.29
1.28
1.02
1.14
1.62
1.93
1.56
1.25

319

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

405
331
298
393
347
402
346
332
401
353
449
295
368
447
349
386
459
184
233
236
151
238
225
227

Granular Roadbed

29
30
18
36
32
33
38
33
41
34
33
33
40
33
32
34
30
18
20
22
21
25
18
27

13
15
21
25
38
29
35
24
35
40
33
37
33
29
40
32
22
19
17
24
25
24
19
19

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993

8

12

18

24

36

60

RMS
Error
(%)

22.72
18.17
21.62
22.87
21.47
17.24
15.81
19.76
15.84
18.87
14.90
16.78
13.63
19.29
20.53
14.95
12.44
17.00
19.76
18.16
21.87
16.91
18.57
17.71

14.87
12.50
14.95
15.70
14.59
11.44
10.92
13.76
10.53
12.77
11.13
11.52
9.51
13.78
15.36
10.61
8.86
12.00
14.50
13.22
15.14
12.08
12.95
12.58

10.52
9.01
10.87
11.66
10.38
8.13
7.85
9.82
7.49
9.07
8.48
8.33
7.10
9.96
11.74
7.81
6.71
8.80
11.03
9.71
10.80
9.06
9.54
9.33

6.36
5.81
7.24
7.82
7.01
5.39
5.36
6.63
4.93
5.86
5.84
5.29
4.72
6.49
8.14
5.13
4.56
5.92
7.62
6.47
6.77
6.11
6.28
6.17

4.40
4.18
5.29
5.76
5.12
3.88
3.90
4.90
3.52
4.13
4.16
3.75
3.42
4.62
6.04
3.73
3.37
4.38
5.63
4.85
4.58
4.43
4.49
4.46

2.54
2.49
3.24
3.51
3.13
2.38
2.42
3.00
2.14
2.39
2.37
2.15
2.07
2.69
3.57
2.22
2.05
2.77
3.37
3.04
2.57
2.52
2.64
2.62

1.36
1.34
1.67
1.85
1.67
1.28
1.32
1.66
1.19
1.23
1.11
1.18
1.15
1.36
1.76
1.25
1.16
1.53
1.74
1.67
1.30
1.24
1.43
1.37

1.73
1.45
1.84
1.39
1.61
1.19
1.29
1.61
1.12
1.56
1.95
1.56
0.99
1.94
1.95
1.79
1.04
1.44
1.36
1.99
1.60
1.79
1.02
1.30

320

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

125
190
170
169
157
179
221
176
191
184
414
207
282
214
281
254
337
215
258
213
166
295
206
241

Granular Roadbed

19
23
19
18
20
26
28
22
29
22
22
25
31
20
17
28
34
26
19
24
18
21
22
22

25
26
20
18
20
27
26
21
29
27
30
30
31
25
19
29
31
23
20
21
26
27
24
25

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993

8

12

18

24

36

60

RMS
Error
(%)

16.08
19.79
17.66
19.92
17.87
16.50
17.65
18.88
16.80
13.71
19.14
13.88
19.78
16.68
14.59
14.95
16.20
15.76
18.95
11.91
12.36
12.20
12.23
11.37

11.41
14.37
12.90
14.70
12.99
11.40
12.08
12.62
11.54
9.69
13.91
10.09
13.95
11.93
10.25
10.78
12.62
12.03
13.91
8.40
9.12
8.60
8.90
8.14

8.43
10.89
9.88
11.30
9.73
8.33
8.88
9.05
8.20
7.26
10.60
7.72
10.10
8.73
7.48
8.14
10.28
9.62
10.63
6.18
7.11
6.37
6.80
6.02

5.69
7.65
7.11
7.72
6.47
5.67
5.89
5.80
5.18
4.90
7.27
5.51
6.46
5.90
4.91
5.64
8.03
7.20
7.44
4.27
5.19
4.17
4.82
4.07

4.17
5.71
5.46
5.69
4.67
4.16
4.21
4.06
3.64
3.58
5.41
4.20
4.45
4.37
3.53
4.27
6.52
5.75
5.46
3.18
3.89
3.02
3.59
2.95

2.50
3.55
3.55
3.28
2.75
2.46
2.49
2.35
2.06
2.17
3.31
2.64
2.45
2.76
2.08
2.72
4.58
3.94
3.10
2.05
2.53
1.75
2.28
1.83

1.34
1.92
1.93
1.70
1.48
1.29
1.29
1.30
1.10
1.27
1.73
1.42
1.32
1.59
1.17
1.42
2.68
2.38
1.60
1.23
1.47
0.90
1.21
1.01

1.19
1.06
1.43
1.07
1.29
1.63
1.11
1.27
1.59
1.79
1.36
1.38
1.61
1.89
1.60
1.88
1.07
0.79
1.18
1.91
0.74
1.44
1.31
1.32

321

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

258
238
276
270
245
247
220
169
205
278
253
362
193
217
254
305
413
336
297
290
396
347
404
346

Granular Roadbed

25
21
24
18
22
25
23
23
24
32
20
30
19
28
29
28
28
30
18
41
35
32
33
38

26
18
18
20
24
27
26
27
31
29
20
25
26
23
31
24
13
15
21
30
25
38
29
35

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005

8

12

18

24

36

60

RMS
Error
(%)

13.61
10.44
11.53
11.42
12.51
12.72
12.02
11.74
13.15
11.89
16.31
15.93
13.19
13.66
14.74
14.00
12.78
15.53
15.44
15.55
14.66
14.04
11.19
14.04

9.88
7.59
8.14
8.39
8.55
10.05
9.52
9.06
9.95
8.91
12.57
13.00
9.83
10.35
11.60
10.64
9.74
11.96
11.68
11.94
10.89
10.33
8.04
10.84

7.51
5.75
6.03
6.44
6.35
8.43
8.03
7.67
8.11
7.24
10.34
11.11
7.87
8.51
9.73
8.65
8.00
9.80
9.52
9.77
8.85
8.23
6.45
9.03

5.41
3.95
3.97
4.49
4.16
6.23
5.98
5.75
5.64
4.99
7.36
8.34
5.40
6.06
7.14
6.15
5.66
7.12
6.78
6.88
6.22
5.71
4.45
6.64

4.17
2.91
2.81
3.25
2.93
4.70
4.60
4.44
4.09
3.55
5.54
6.35
3.91
4.45
5.43
4.57
4.12
5.38
5.05
5.07
4.61
4.14
3.20
5.09

2.77
1.82
1.63
1.97
1.70
2.79
2.76
2.71
2.31
2.02
3.42
3.82
2.31
2.57
3.39
2.72
2.40
3.32
3.11
3.00
2.73
2.43
1.77
3.14

1.51
1.04
0.88
1.04
0.95
1.37
1.27
1.31
1.02
0.98
1.72
1.78
1.14
1.27
1.77
1.38
1.18
1.68
1.54
1.47
1.37
1.22
0.83
1.47

1.68
1.43
0.98
0.74
1.16
0.67
1.36
1.61
1.54
0.71
0.65
0.50
0.56
0.91
0.63
0.65
0.68
0.62
0.87
0.56
0.94
0.70
1.73
1.82

322

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300

335
403
354
448
295
1,415
1,734
1,638
1,191
1,080
839
1,406
872
1,038
1,039
931
1,095
919
855
891
850
797
1,117
1,264

Granular Roadbed

33
41
34
33
33
24
24
28
23
28
22
17
27
24
25
26
26
23
24
22
25
26
30
23

24
35
40
33
37
20
21
21
25
27
16
15
23
21
15
20
23
16
18
18
20
22
31
18

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)

8

12

18

24

36

60

RMS
Error
(%)

12.21
14.11
17.24
17.28
18.87
18.37
16.93
17.27
12.41
14.16
12.17
10.97
11.15
10.44
11.74
14.13
13.62
12.18
13.24
19.63
12.18
14.07
14.66
14.28

9.37
10.42
13.46
13.65
15.12
14.69
13.14
13.19
8.99
10.41
8.75
8.87
8.94
8.39
9.29
11.15
10.92
9.58
10.48
16.12
9.85
10.91
11.77
11.51

7.90
8.32
11.17
11.27
12.78
12.57
10.78
10.93
7.32
8.37
7.04
7.49
7.71
7.19
7.96
9.22
9.14
7.88
8.66
13.79
8.55
9.01
10.07
9.97

6.03
5.86
8.27
8.26
9.73
9.72
7.67
8.04
5.23
5.98
4.99
5.59
5.80
5.47
6.03
6.60
6.68
5.59
6.19
10.32
6.53
6.35
7.41
7.59

4.84
4.29
6.33
6.27
7.60
7.71
5.60
6.14
3.94
4.49
3.73
4.22
4.40
4.20
4.60
4.81
4.85
4.03
4.53
7.76
4.99
4.65
5.51
5.83

3.24
2.53
3.97
3.83
4.75
4.89
3.07
3.78
2.44
2.86
2.27
2.59
2.60
2.53
2.76
2.73
2.65
2.27
2.65
4.57
2.99
2.77
3.26
3.59

1.73
1.29
1.97
1.88
2.25
2.29
1.38
1.78
1.26
1.62
1.22
1.38
1.25
1.19
1.25
1.26
1.11
1.09
1.35
2.06
1.34
1.49
1.57
1.78

1.54
0.80
0.94
0.68
1.40
1.92
0.82
1.89
1.33
1.66
1.42
0.88
0.88
1.13
1.70
0.73
0.77
0.34
0.65
0.62
1.22
1.17
0.67
0.84

323

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

300
300
300
300
300
300
300
300
300
300
300
400
400
400
400
400
400
400
400
400
400
400
400
400

1,245
811
940
971
1,142
1,342
1,012
969
901
637
814
1,683
2,125
2,398
2,147
1,329
1,681
1,394
1,202
1,276
2,277
975
1,424
1,641

Granular Roadbed

35
26
20
19
16
16
17
19
33
32
35
30
25
26
22
20
17
24
24
12
20
25
19
20

16
21
14
14
12
12
19
15
22
18
23
23
24
25
24
23
26
27
22
14
22
21
19
17

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)

8

12

18

24

36

60

RMS
Error
(%)

13.20
15.10
14.00
17.22
15.85
15.04
14.88
12.68
12.51
14.24
11.14
13.37
12.74
14.24
13.28
14.82
17.03
16.63
14.87
16.04
14.76
14.12
17.55
13.63

10.22
11.86
10.58
13.22
12.01
11.09
11.60
9.67
9.38
10.55
8.11
10.35
9.71
10.78
10.26
11.14
12.86
12.77
11.27
11.93
10.88
10.19
12.95
10.89

8.59
10.01
8.61
11.00
9.76
8.83
9.64
7.87
7.72
8.54
6.68
8.75
8.11
8.93
8.57
9.37
10.43
10.78
9.53
9.70
8.83
8.11
10.30
9.36

6.18
7.36
5.84
8.11
6.94
5.99
6.82
5.44
5.51
5.94
4.64
6.55
5.93
6.39
6.26
6.93
7.24
8.03
7.20
6.82
6.23
5.54
7.27
7.14

4.50
5.56
4.08
6.17
5.19
4.33
4.95
3.91
4.01
4.40
3.34
5.01
4.38
4.65
4.64
5.25
5.20
6.13
5.54
4.91
4.52
3.95
5.51
5.55

2.60
3.46
2.27
3.82
3.18
2.56
2.91
2.28
2.31
2.75
1.89
3.15
2.57
2.60
2.76
3.35
3.03
3.82
3.50
2.82
2.61
2.28
3.54
3.50

1.30
1.74
1.09
1.86
1.65
1.38
1.50
1.14
1.14
1.50
0.94
1.57
1.18
1.17
1.30
1.82
1.56
1.85
1.81
1.47
1.26
1.19
1.92
1.78

0.92
0.89
0.79
1.77
0.68
1.02
0.91
0.59
1.14
0.81
1.50
1.55
1.91
1.72
1.44
1.23
0.63
1.95
1.76
1.11
1.60
0.99
0.54
0.99

324

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400

1,277
1,195
988
1,025
822
676
1,008
1,080
1,224
744
1,227
1,411
1,670
1,284
1,412
945
750
1,153
1,180
800
957
756
566
1,608

Granular Roadbed

23
22
22
19
23
25
22
26
26
28
30
25
25
19
22
26
20
19
24
21
22
26
24
23

23
17
27
16
18
22
20
26
26
20
31
19
27
24
22
17
19
16
17
20
23
25
16
17

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-10-2005

8

12

18

24

36

60

RMS
Error
(%)

17.23
15.95
15.67
13.90
16.29
15.14
18.78
14.58
14.61
16.15
12.37
13.54
15.16
15.88
15.56
13.05
12.83
14.70
15.81
15.53
13.73
14.73
12.67
11.49

13.54
12.67
12.39
10.75
12.59
11.90
14.00
10.30
10.98
11.89
9.07
10.16
11.57
12.43
12.78
8.69
8.60
9.89
10.66
10.15
9.39
10.61
8.72
8.67

11.59
10.87
10.64
9.03
10.56
10.03
11.30
8.10
8.94
9.66
7.37
8.27
9.69
10.44
11.17
6.31
6.27
7.11
7.62
7.19
6.73
7.81
6.30
6.92

8.89
8.43
8.22
6.70
7.90
7.43
7.95
5.58
6.38
6.86
5.32
5.94
7.33
7.86
8.97
4.31
4.15
4.65
5.20
4.77
4.53
5.54
4.42
4.96

7.00
6.66
6.53
5.09
6.01
5.64
5.86
4.10
4.70
5.08
4.09
4.50
5.72
6.07
7.33
3.20
2.98
3.39
3.94
3.50
3.40
4.21
3.41
3.72

4.41
4.41
4.29
3.08
3.65
3.43
3.53
2.56
2.77
3.15
2.68
2.86
3.71
3.86
4.92
1.99
1.72
1.99
2.42
2.03
2.13
2.70
2.13
2.27

2.17
2.24
2.18
1.66
1.78
1.73
1.77
1.42
1.39
1.73
1.45
1.65
1.97
2.08
2.45
1.04
0.77
0.89
1.19
0.95
1.08
1.31
1.02
1.17

1.89
1.76
1.83
1.25
1.55
0.83
1.11
0.94
1.02
1.00
1.16
1.35
1.55
0.79
1.94
1.93
1.45
1.49
1.26
1.53
1.61
1.17
1.73
0.60

325

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
200
200
200
200
200
200
200
200
275

1,312
1,411
1,419
1,162
1,178
1,224
688
567
966
680
874
788
1,017
1,045
2,010
368
533
429
324
346
361
473
468
1,089

Granular Roadbed

18
21
21
25
19
21
19
30
23
25
35
32
26
23
19
42
35
31
33
31
38
34
41
36

14
13
14
18
16
17
17
21
21
18
21
19
15
15
12
22
28
24
19
23
21
17
22
24

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005

8

12

18

24

36

60

RMS
Error
(%)

11.57
10.78
11.15
11.17
9.24
11.92
10.85
11.33
11.31
11.60
11.94
10.70
9.97
12.15
11.89
8.10
7.79
7.61
7.75
7.69
6.50
7.64
7.47
7.98

8.74
8.03
8.44
8.43
6.79
9.26
8.12
8.41
8.47
8.74
9.13
7.85
7.45
9.09
8.81
6.53
6.24
6.06
6.23
6.12
5.09
6.13
5.94
6.45

6.96
6.39
6.78
6.83
5.45
7.59
6.54
6.70
6.66
7.00
7.39
6.27
5.88
7.25
7.00
5.76
5.44
5.30
5.44
5.32
4.42
5.40
5.17
5.68

4.85
4.55
4.89
4.94
3.94
5.57
4.69
4.69
4.61
4.93
5.29
4.41
4.09
5.11
4.84
4.58
4.26
4.19
4.31
4.18
3.45
4.32
4.04
4.48

3.54
3.36
3.74
3.80
2.95
4.19
3.52
3.48
3.31
3.61
4.06
3.27
2.98
3.75
3.46
3.71
3.40
3.39
3.50
3.36
2.77
3.50
3.23
3.63

2.04
2.04
2.37
2.42
1.81
2.45
2.12
2.10
1.88
2.11
2.57
2.02
1.72
2.17
1.96
2.43
2.10
2.17
2.26
2.19
1.77
2.27
2.04
2.34

0.99
1.06
1.20
1.27
0.88
1.10
1.04
1.15
0.91
1.00
1.36
1.04
0.79
0.99
0.92
1.21
0.94
1.04
1.10
1.12
0.85
1.05
0.95
1.11

0.55
0.79
0.74
0.60
1.54
1.54
1.15
1.70
0.50
0.77
0.56
0.63
1.46
1.61
0.81
1.24
1.42
1.51
1.35
1.30
1.64
1.67
1.40
1.29

326

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

275
275
275
275
275
275
275
275
275
275
275
275
275
275
275
160
160
160
160
160
160
160
160
160

1,158
1,080
1,139
1,108
1,411
1,640
1,275
903
1,110
1,200
1,020
1,015
1,385
1,215
1,117
2,959
3,320
3,135
3,086
2,532
3,207
3,597
3,126
3,218

Granular Roadbed

31
39
38
39
44
26
35
39
32
31
36
40
35
28
29
52
45
52
52
59
64
49
51
48

27
26
23
22
30
24
26
24
29
26
20
26
33
26
28
16
21
19
18
18
23
19
21
18

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)

8

12

18

24

36

60

RMS
Error
(%)

8.06
8.10
7.68
8.53
8.62
7.67
8.51
8.00
8.45
8.97
8.29
7.62
8.69
8.18
8.08
9.45
7.87
8.34
8.11
8.04
7.68
12.08
12.69
13.48

6.61
6.53
6.18
6.78
6.80
6.15
6.76
6.33
6.59
7.15
6.46
5.92
6.89
6.44
6.55
7.82
6.45
6.76
6.54
6.45
6.16
8.63
9.28
9.75

5.87
5.70
5.40
5.87
5.78
5.37
5.88
5.47
5.61
6.20
5.56
5.06
5.93
5.48
5.70
6.91
5.65
5.87
5.71
5.57
5.32
6.58
7.26
7.53

4.77
4.49
4.24
4.55
4.42
4.22
4.58
4.24
4.23
4.87
4.28
3.81
4.62
4.23
4.46
5.53
4.45
4.63
4.50
4.37
4.19
4.40
4.96
5.09

3.92
3.53
3.38
3.57
3.39
3.34
3.65
3.31
3.26
3.89
3.37
2.95
3.63
3.31
3.56
4.55
3.51
3.69
3.58
3.45
3.35
3.22
3.62
3.71

2.59
2.15
2.08
2.12
1.96
2.07
2.34
2.04
2.00
2.55
2.12
1.76
2.27
2.04
2.21
3.00
2.15
2.27
2.23
2.08
2.03
1.96
2.17
2.22

1.27
0.97
0.93
0.93
0.78
0.89
1.17
0.98
0.92
1.31
1.06
0.81
1.00
0.93
1.03
1.44
0.94
1.04
1.04
0.96
0.97
1.00
1.11
1.09

1.37
1.38
1.41
1.51
1.53
1.55
1.34
1.47
1.05
1.24
1.63
1.57
1.46
1.29
1.13
1.10
1.04
1.33
1.27
1.54
1.85
0.81
0.82
0.45

327

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

160
160
160
160
160
160
160
160
160
160
160
160
160
160
160
160
160
160
160
160
160
250
250
250

3,657
3,207
3,457
2,837
2,841
3,670
2,353
2,546
2,158
2,093
2,086
2,438
2,696
2,536
3,074
3,103
3,660
3,097
3,110
2,977
3,005
662
766
693

Granular Roadbed

49
42
44
39
35
42
51
50
46
52
54
50
41
46
45
40
40
42
45
44
49
37
33
31

16
20
21
21
24
22
17
20
21
15
19
24
19
21
19
14
21
19
19
21
20
26
23
23

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002

8

12

18

24

36

60

RMS
Error
(%)

12.37
12.10
13.60
14.18
12.63
11.86
12.61
11.54
11.93
11.80
11.91
11.38
11.37
10.75
10.74
11.14
11.15
10.99
11.51
11.13
10.85
10.85
10.62
10.87

8.76
8.91
9.68
10.11
9.14
8.66
9.26
8.30
8.59
8.35
8.44
7.98
8.07
9.07
9.05
9.32
9.26
9.13
9.53
9.20
8.89
9.02
8.83
9.05

6.63
6.91
7.31
7.51
7.03
6.70
7.17
6.41
6.60
6.37
6.47
6.13
6.18
7.76
7.77
8.06
7.92
7.81
8.00
7.76
7.60
7.60
7.53
7.80

4.38
4.70
4.81
4.78
4.60
4.58
4.94
4.30
4.51
4.23
4.34
4.12
4.16
6.03
6.06
6.27
6.19
6.07
6.09
5.92
5.88
5.83
5.86
6.07

3.15
3.40
3.40
3.27
3.21
3.37
3.68
3.09
3.29
3.04
3.15
3.03
2.98
4.64
4.66
4.80
4.75
4.64
4.66
4.49
4.53
4.42
4.50
4.65

1.82
1.97
1.91
1.72
1.76
2.00
2.25
1.76
1.90
1.74
1.85
1.83
1.72
2.68
2.72
2.73
2.72
2.64
2.64
2.57
2.64
2.53
2.61
2.65

0.89
0.93
0.88
0.74
0.83
0.99
1.12
0.86
0.88
0.82
0.86
0.88
0.81
1.18
1.18
1.15
1.22
1.14
1.14
1.15
1.17
1.13
1.18
1.14

0.62
0.73
0.97
1.48
0.52
0.54
0.61
0.72
1.59
1.11
1.40
1.02
1.11
1.24
0.95
1.13
1.42
1.13
0.97
1.18
0.72
1.19
1.19
1.16

328

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250

690
895
694
694
793
829
766
834
887
794
800
756
836
936
971
944
858
896
776
769
879
814
888
938

Granular Roadbed

33
31
28
24
29
34
33
34
32
33
33
37
34
22
21
20
22
21
21
23
23
23
24
21

28
27
28
31
30
26
23
29
28
30
28
28
30
23
23
23
22
23
23
23
23
24
23
23

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002

8

12

18

24

36

60

RMS
Error
(%)

10.93
11.01
10.60
11.43
10.85
11.06
11.73
11.42
13.08
10.71
10.66
10.67
11.67
11.25
11.30
10.64
10.51
10.58
11.27
10.76
10.72
10.72
10.56
10.39

8.99
8.85
8.74
9.37
8.86
8.75
9.26
9.29
10.38
8.66
8.81
8.58
9.08
9.02
9.09
8.73
8.66
8.67
8.95
8.78
8.93
8.71
8.45
8.65

7.61
7.39
7.43
7.86
7.48
7.20
7.63
7.82
8.58
7.31
7.47
7.31
7.45
7.52
7.52
7.44
7.41
7.31
7.45
7.45
7.44
7.39
7.13
7.36

5.79
5.51
5.71
5.97
5.71
5.29
5.78
5.87
6.39
5.56
5.70
5.59
5.38
5.58
5.62
5.66
5.71
5.60
5.51
5.72
5.67
5.64
5.54
5.67

4.42
4.17
4.33
4.53
4.33
3.95
4.33
4.42
4.72
4.21
4.33
4.21
3.99
4.14
4.20
4.32
4.33
4.28
4.09
4.37
4.32
4.36
4.22
4.32

2.55
2.36
2.52
2.63
2.51
2.24
2.48
2.52
2.64
2.45
2.47
2.36
2.23
2.36
2.37
2.49
2.45
2.44
2.29
2.48
2.49
2.49
2.51
2.51

1.11
1.10
1.15
1.14
1.11
1.10
1.17
1.15
1.14
1.14
1.10
1.06
1.09
1.10
1.07
1.14
1.10
1.07
1.06
1.17
1.09
1.07
1.13
1.10

0.74
1.39
1.20
0.49
0.71
1.94
1.17
1.31
0.51
1.04
1.25
1.44
1.96
1.41
1.04
1.22
1.52
0.91
1.38
1.80
0.87
0.69
0.59
0.90

329

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250

806
666
825
756
789
561
596
685
568
736
824
779
500
626
646
797
856
829
609
772
812
852
813
897

Granular Roadbed

23
26
25
22
24
29
26
24
20
26
23
24
28
26
25
25
23
24
25
25
23
23
26
23

24
24
23
23
24
24
23
23
23
23
24
25
25
24
24
23
24
24
25
23
24
24
23
24

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-M-M53-CS50015-04-04-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008

8

12

18

24

36

60

RMS
Error
(%)

10.51
11.01
11.17
13.55
12.28
12.33
12.69
13.27
16.71
15.42
14.15
14.16
14.77
7.78
13.87
16.27
17.27
13.99
12.02
15.52
16.04
17.84
19.76
17.61

8.51
8.86
8.94
10.03
9.08
9.05
9.71
10.11
13.13
12.18
10.04
10.68
11.37
6.56
11.29
13.63
13.95
11.50
9.35
12.82
13.05
14.50
15.96
14.18

7.23
7.48
7.41
8.01
7.30
7.37
7.95
8.27
10.71
10.11
7.61
8.43
9.24
5.97
9.16
11.46
11.29
9.61
7.62
10.73
10.78
11.90
13.02
11.65

5.51
5.66
5.55
5.89
5.46
5.41
6.01
6.34
8.03
8.04
5.29
6.20
6.90
5.24
6.58
8.70
7.98
7.24
5.55
8.15
7.94
8.75
9.54
8.70

4.20
4.28
4.16
4.53
4.27
4.19
4.73
5.03
6.20
6.52
3.96
4.77
5.36
4.54
4.81
6.68
5.67
5.56
4.25
6.32
5.96
6.52
7.17
6.69

2.40
2.44
2.35
2.85
2.85
2.70
3.11
3.29
3.91
4.47
2.39
2.98
3.39
3.40
2.58
3.94
2.87
3.36
2.63
3.85
3.45
3.62
4.17
4.12

1.06
1.09
1.10
1.49
1.64
1.54
1.70
1.77
1.94
2.58
1.26
1.55
1.74
1.84
1.02
1.84
1.12
1.62
1.38
1.85
1.53
1.53
1.99
2.13

0.83
0.83
1.48
1.85
1.12
1.43
1.34
1.97
1.75
1.37
1.56
1.72
1.69
1.63
1.70
0.59
0.98
0.92
1.09
1.09
1.47
1.42
1.05
0.84

330

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

250
250
250
350
350
350
350
350
350
350
350
350
350
300
700
700
700
700
700
700
700
700
700
700

815
732
622
1,433
1,264
1,344
1,677
1,747
1,666
1,606
958
1,372
1,622
1,253
1,322
1,257
962
1,329
1,056
1,256
1,143
1,046
803
853

Granular Roadbed

24
24
26
32
42
39
36
33
22
32
32
30
27
35
16
15
12
19
29
17
15
12
14
18

25
24
24
20
19
20
18
17
16
12
24
20
17
17
31
19
27
21
25
19
22
21
17
16

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US2-CS27022-05-20-2008
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002

8

12

18

24

36

60

RMS
Error
(%)

17.99
17.49
17.11
18.45
16.35
15.97
17.59
17.00
18.65
17.73
17.97
18.77
16.97
8.31
6.76
6.90
6.77
8.52
8.36
7.98
7.15
6.18
7.57
7.51

14.62
13.99
12.61
13.93
12.06
11.64
13.09
13.12
13.97
12.87
13.35
13.85
12.35
5.84
6.29
6.18
6.09
7.72
7.42
7.11
6.50
5.51
6.78
6.82

12.07
11.38
9.96
10.91
9.33
9.02
10.17
10.42
10.94
9.91
10.57
10.71
9.56
4.68
5.88
5.60
5.55
7.06
6.72
6.43
5.97
4.99
6.09
6.26

8.96
8.31
7.16
7.94
6.70
6.55
7.36
7.67
7.95
7.12
7.79
7.81
6.89
3.62
5.13
4.81
4.84
6.07
5.68
5.59
5.25
4.32
5.08
5.54

6.92
6.25
5.50
6.13
5.18
5.11
5.59
5.96
6.19
5.52
6.18
6.08
5.34
3.07
4.44
4.08
4.13
5.13
4.70
4.65
4.54
3.67
4.24
4.87

4.41
3.78
3.36
3.77
3.23
3.27
3.37
3.81
3.92
3.51
4.06
3.92
3.38
2.42
3.31
2.88
2.80
3.60
3.10
3.11
3.38
2.64
2.93
3.42

2.33
1.95
1.55
1.75
1.57
1.65
1.46
1.83
1.91
1.77
2.09
1.94
1.71
1.56
1.82
1.56
1.54
1.91
1.46
1.60
2.00
1.49
1.51
2.07

0.89
0.61
1.52
1.33
1.22
1.35
1.91
0.79
1.07
1.36
1.05
1.04
1.45
1.94
0.80
0.41
1.58
0.75
0.64
1.23
0.48
0.37
0.76
1.74

331

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
150
150
150
150
150
150
150
150
150
150
150
250
700
700
700
700
700
700
700
700
700
700

805
770
2,397
2,332
2,080
1,874
2,546
2,628
1,967
1,588
1,823
1,681
1,740
655
2,738
1,835
1,944
1,596
1,464
1,550
2,006
1,965
1,449
1,861

Granular Roadbed

18
18
28
26
32
35
26
29
28
32
32
29
33
108
18
26
24
17
14
18
31
35
23
29

15
18
12
10
12
11
12
10
9
10
9
9
11
18
23
25
26
21
27
24
19
26
25
19

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997

8

12

18

24

36

60

RMS
Error
(%)

11.13
11.29
8.35
8.02
7.90
11.42
8.62
9.72
9.45
6.89
7.56
7.32
7.48
8.62
7.95
6.61
7.32
8.39
8.86
6.65
6.50
7.24
7.05
8.39

9.46
9.50
7.22
7.02
7.07
9.33
7.24
8.15
7.95
5.67
6.34
6.18
5.94
6.93
6.34
5.16
6.14
6.65
7.76
5.59
5.39
5.83
5.98
6.77

8.36
8.33
6.34
6.21
6.36
7.99
6.10
7.09
6.85
4.76
5.43
5.39
4.92
5.71
5.24
4.21
5.20
5.71
6.85
4.88
4.72
4.92
5.24
5.75

6.97
6.73
5.23
5.19
5.51
6.42
4.80
5.79
5.59
3.82
4.57
4.49
3.94
4.53
4.09
3.19
4.09
4.57
5.59
3.90
3.82
4.02
4.41
4.65

5.77
5.47
4.23
4.30
4.74
5.12
3.66
4.49
4.41
2.95
3.74
3.70
3.15
3.46
3.11
2.32
3.11
3.70
4.49
3.07
3.07
3.11
3.54
3.66

3.89
3.57
2.79
2.98
3.12
3.27
2.17
2.91
2.87
1.93
2.72
2.68
2.17
2.17
1.89
1.34
1.93
2.52
3.19
2.05
2.05
2.09
2.52
2.44

2.20
1.87
1.48
1.62
1.70
1.77
1.06
1.34
1.34
1.14
1.81
1.73
1.30
1.18
0.91
0.63
1.02
1.38
1.81
1.06
1.06
1.22
1.46
1.26

0.98
0.55
0.97
0.60
1.86
0.80
1.20
1.06
1.08
1.81
1.81
1.31
0.79
1.14
0.99
0.66
1.47
1.14
1.23
0.55
0.52
1.29
0.77
1.20

332

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

704
654
965
1,130
1,533
780
1,029
1,249
1,286
1,028
962
1,132
804
823
1,023
1,058
1,127
965
1,230
1,526
1,656
991
1,493
1,072

Granular Roadbed

25
21
26
29
21
27
27
21
22
53
69
64
60
38
33
40
38
43
36
41
42
53
49
36

17
19
25
23
23
22
35
28
28
34
22
23
30
32
40
57
37
28
21
36
36
32
27
30

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-G-US131-CS54014-05-13-1998

8

12

18

24

36

60

RMS
Error
(%)

8.94
11.89
10.24
8.66
7.91
6.97
7.91
7.56
8.74
5.67
7.28
7.44
7.32
7.56
7.76
9.09
9.17
9.02
8.82
7.28
9.49
8.07
9.17
5.47

7.48
9.02
8.50
7.28
6.42
5.87
6.46
5.98
7.05
4.92
6.34
6.18
6.22
6.38
6.65
6.18
5.63
5.63
5.67
5.00
6.65
5.04
5.71
4.61

6.34
7.60
7.24
6.10
5.43
5.04
5.39
4.96
5.83
4.37
5.63
5.24
5.43
5.59
5.79
4.69
4.09
4.02
4.06
3.82
5.28
3.78
4.37
4.06

5.20
6.10
5.79
4.96
4.37
4.13
4.33
3.82
4.57
3.70
4.76
4.09
4.45
4.53
4.84
3.70
3.07
2.95
3.03
2.87
4.25
2.91
3.35
3.43

4.21
4.84
4.57
3.82
3.50
3.27
3.31
2.91
3.50
2.99
3.82
3.07
3.54
3.62
3.90
2.87
2.28
2.24
2.28
2.13
3.27
2.20
2.56
2.72

2.99
3.35
2.91
2.52
2.40
2.17
2.13
1.85
2.24
2.05
2.36
1.93
2.40
2.40
2.72
2.05
1.50
1.50
1.50
1.38
2.24
1.57
1.77
1.89

1.85
2.01
1.69
1.38
1.38
1.18
1.18
1.06
1.22
1.18
1.18
1.06
1.42
1.46
1.65
1.34
0.91
0.94
0.91
0.87
1.42
1.02
1.14
1.18

1.10
1.01
1.75
1.20
0.38
0.72
1.24
1.37
0.72
1.24
1.83
1.89
1.40
1.99
1.42
1.82
1.98
1.78
1.91
1.85
1.98
1.89
1.75
1.91

333

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

826
468
766
971
942
1,400
949
781
802
2,155
1,929
993
1,253
1,128
1,206
265
229
214
251
399
354
236
224
1,200

Granular Roadbed

49
40
33
36
49
42
42
49
38
52
25
40
46
46
47
63
58
63
58
61
51
77
64
58

21
19
23
28
28
32
32
36
31
33
33
36
27
26
23
30
43
43
43
46
28
40
35
36

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998

8

12

18

24

36

60

RMS
Error
(%)

5.67
5.71
5.87
9.65
8.90
5.28
6.54
6.18
6.38
8.70
7.28
7.76
7.13
8.19
6.81
6.38
6.81
6.50
9.09
5.87
5.67
6.02
5.67
5.55

4.96
4.84
4.96
8.11
7.64
4.53
5.55
5.08
5.28
7.44
6.30
6.65
6.02
7.20
5.94
5.39
5.83
5.55
7.76
4.92
4.69
5.08
4.65
4.61

4.37
4.25
4.25
7.17
6.93
3.98
4.96
4.37
4.61
6.57
5.47
5.71
5.24
6.42
5.24
4.72
5.16
4.76
6.77
4.29
4.09
4.49
4.06
4.02

3.74
3.50
3.39
5.75
5.83
3.27
4.09
3.58
3.74
5.59
4.65
4.72
4.37
5.43
4.41
3.98
4.25
3.90
5.51
3.58
3.39
3.82
3.35
3.31

3.03
2.76
2.52
4.45
4.61
2.52
3.27
2.64
2.80
4.37
3.62
3.70
3.46
4.41
3.54
3.11
3.54
2.91
4.21
2.80
2.60
3.03
2.60
2.52

2.17
1.97
1.54
2.76
3.15
1.65
2.32
1.73
1.77
2.91
2.40
2.44
2.32
2.83
2.48
2.05
2.48
1.77
2.64
1.85
1.77
2.09
1.61
1.61

1.26
1.18
0.67
1.26
1.61
0.91
1.38
0.91
0.91
1.42
1.22
1.42
1.34
1.34
1.46
1.06
1.61
0.87
1.34
1.06
1.06
1.22
0.87
0.87

1.03
1.58
1.25
0.64
1.11
1.79
1.28
1.83
1.57
1.10
1.24
1.89
1.28
0.84
1.34
1.05
1.89
1.91
1.57
1.62
1.98
1.37
1.64
1.55

334

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

1,518
1,123
1,217
827
1,075
1,365
1,075
996
1,039
1,070
1,172
827
961
1,286
1,136
1,254
931
1,053
782
1,134
1,018
1,229
1,179
1,200

Granular Roadbed

44
54
26
16
18
40
43
36
31
17
23
32
35
14
37
29
51
26
19
42
51
43
37
39

33
35
58
32
26
45
30
44
44
29
33
29
31
31
28
38
26
45
30
38
38
34
46
47

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998

8

12

18

24

36

60

RMS
Error
(%)

5.39
5.94
6.61
6.57
8.46
7.48
7.72
7.13
8.90
12.99
8.90
10.08
8.46
9.76
7.44
8.46
7.95
7.99
6.69
8.03
7.36
7.60
6.61
6.73

4.69
5.04
5.55
5.47
7.36
6.38
6.54
5.94
7.24
10.00
7.17
7.80
7.28
7.99
6.22
6.97
6.85
6.69
5.63
6.69
6.18
6.38
5.43
5.59

4.09
4.49
4.92
4.80
6.42
5.63
5.63
5.04
6.18
8.27
6.02
6.61
6.50
6.73
5.35
5.98
6.02
5.87
4.96
5.79
5.31
5.55
4.69
4.80

3.43
3.66
3.98
3.94
5.20
4.49
4.61
3.90
4.76
6.02
4.65
5.12
5.47
5.43
4.37
4.76
5.00
4.84
4.09
4.65
4.29
4.49
3.78
3.98

2.64
2.87
3.03
3.03
4.06
3.54
3.46
2.99
3.62
4.33
3.43
3.82
4.29
4.09
3.31
3.62
3.94
3.78
3.15
3.58
3.39
3.58
2.91
3.07

1.77
1.97
1.97
1.97
2.60
2.40
2.28
1.89
2.24
2.44
2.17
2.36
2.83
2.68
2.13
2.36
2.68
2.60
2.09
2.36
2.20
2.28
1.89
2.05

0.94
1.06
1.02
1.06
1.38
1.42
1.26
1.06
1.26
1.18
1.18
1.34
1.34
1.46
1.06
1.30
1.57
1.50
1.06
1.26
1.26
1.18
1.06
1.18

1.66
1.11
1.48
1.34
1.70
1.93
2.00
1.94
1.85
0.76
1.66
1.59
0.95
1.31
1.18
1.34
1.82
1.29
1.14
0.99
1.38
0.49
1.33
1.54

335

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

1,445
1,238
1,046
1,021
837
801
785
705
550
326
520
428
1,190
580
949
687
900
842
1,184
807
835
977
905
908

Granular Roadbed

36
36
29
33
23
36
29
34
27
17
28
27
16
27
26
30
32
34
29
29
36
26
39
40

43
38
39
38
29
28
31
37
31
30
33
29
32
28
38
32
27
28
39
32
33
35
39
35

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-M37-CS62032-05-18-2000
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998

8

12

18

24

36

60

RMS
Error
(%)

6.97
7.95
9.37
9.69
8.62
10.24
10.91
10.59
8.11
6.69
11.06
5.63
5.83
6.10
6.14
5.83
5.31
6.26
7.17
7.32
6.73
10.28
8.78
7.17

5.71
6.54
7.72
8.03
7.28
8.23
9.06
8.74
6.81
5.59
9.06
4.88
5.16
5.35
5.35
5.16
4.61
5.71
6.30
6.54
5.75
8.86
6.85
5.98

4.88
5.47
6.54
6.89
6.22
6.77
7.76
7.40
5.79
4.76
7.48
4.45
4.72
4.76
4.88
4.61
4.21
5.20
5.67
5.87
5.31
7.60
5.87
5.20

3.82
4.41
4.96
5.51
5.00
5.08
6.02
5.67
4.49
3.78
5.71
3.82
4.21
4.06
4.21
3.94
3.58
4.57
4.92
4.84
4.65
6.26
4.76
4.41

2.91
3.43
3.66
4.25
3.86
3.66
4.45
4.09
3.27
2.83
4.17
3.11
3.43
3.23
3.43
3.11
2.83
3.74
3.94
3.86
3.70
4.76
3.66
3.50

1.89
2.28
2.28
2.72
2.48
2.24
2.52
2.13
1.97
1.81
2.48
2.20
2.56
2.28
2.44
2.20
1.93
2.68
2.83
2.60
2.64
3.11
2.44
2.32

1.06
1.34
1.18
1.42
1.30
1.14
1.10
0.67
0.94
0.91
1.22
1.30
1.50
1.38
1.38
1.30
1.06
1.46
1.65
1.34
1.46
1.57
1.42
1.34

1.50
1.38
1.82
0.77
1.10
1.73
1.27
0.71
1.93
1.33
1.44
1.23
1.42
1.85
1.02
1.95
1.73
1.27
1.50
1.48
1.66
1.85
1.66
1.91

336

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

750
640
545
656
744
448
582
635
720
932
461
1,676
2,064
1,305
1,684
1,455
1,785
2,081
1,310
1,276
1,604
586
464
787

Granular Roadbed

39
38
24
22
24
23
14
11
23
30
19
42
35
43
32
40
34
21
31
21
27
18
37
37

38
31
33
28
31
34
34
51
41
44
31
32
28
30
30
32
39
30
25
31
29
27
26
28

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS59021-08-23-1994

8

12

18

24

36

60

RMS
Error
(%)

10.75
9.63
9.38
10.31
9.60
9.04
10.48
9.43
8.67
9.01
11.80
9.59
9.58
9.42
10.38
8.42
9.81
9.88
9.14
10.40
9.04
9.32
9.52
7.51

8.44
7.51
7.25
7.73
7.40
6.37
7.45
6.48
6.42
6.94
8.37
7.52
7.28
7.19
8.11
6.03
8.05
7.97
7.30
7.74
7.44
7.60
7.64
6.21

6.58
6.02
5.69
5.91
5.92
4.76
5.54
4.77
4.92
5.46
6.11
5.88
5.83
5.58
6.45
4.54
6.55
6.51
5.91
5.91
6.24
6.35
6.36
4.96

4.72
4.37
4.14
4.20
4.37
3.28
3.91
3.33
3.34
3.99
4.27
4.25
4.20
3.97
4.64
3.18
4.85
4.81
4.33
4.21
4.77
4.81
4.80
3.62

3.56
3.37
3.21
3.25
3.37
2.49
3.02
2.49
2.49
3.07
3.27
3.30
3.06
3.02
3.62
2.35
3.85
3.69
3.29
3.23
3.67
3.73
3.58
2.77

2.33
2.26
2.19
2.27
2.29
1.59
2.07
1.61
1.58
2.08
2.26
2.25
1.94
1.96
2.53
1.50
2.54
2.34
2.19
2.20
2.25
2.33
2.10
1.83

1.42
1.43
1.38
1.40
1.40
0.96
1.26
1.00
0.95
1.26
1.38
1.37
1.19
1.19
1.60
0.90
1.54
1.41
1.33
1.40
1.09
1.17
0.99
1.12

1.52
1.62
1.45
1.26
0.70
1.28
0.87
1.87
1.23
0.76
1.20
1.10
1.88
1.17
1.70
1.18
1.23
1.35
1.22
1.79
1.33
1.40
1.39
1.84

337

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

2,255
2,544
2,272
1,538
2,564
1,689
1,249
1,371
2,280
2,599
1,007
2,412
2,649
2,336
2,026
2,074
3,459
3,509
3,148
1,620
7,250
6,262
6,253
4,082

Granular Roadbed

43
51
54
51
51
56
53
57
54
55
49
51
46
50
51
58
45
42
49
52
31
34
29
58

26
26
27
25
26
37
28
36
39
29
27
27
31
30
23
40
24
26
27
27
33
31
36
33

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(4)
flex-N-US23-CS4032-06-03-2008
flex-U-M52-CS33051-11-13-2002
flex-M-M53-CS50015-04-04-2008
flex-M-M53-CS50015-04-04-2008
flex-M-M53-CS50015-04-04-2008
flex-M-M53-CS50015-04-04-2008
flex-M-M53-CS50015-04-04-2008
flex-M-M53-CS50015-04-04-2008
flex-M-M53-CS50015-04-04-2008
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-02-27-2009

8

12

18

24

36

60

RMS
Error
(%)

9.31
7.25
8.37
8.61
8.94
9.84
7.95
11.22
10.96
9.54
9.40
9.13
8.04
8.95
8.01
10.81
10.65
9.30
9.21
9.71
10.28
9.53
9.57
9.15

7.34
6.00
6.32
6.35
6.34
7.80
5.59
9.38
9.96
8.54
8.46
8.07
7.27
8.02
7.09
9.92
9.71
8.39
8.36
8.84
9.32
8.71
8.79
8.21

5.94
4.79
4.89
4.94
4.62
5.98
4.48
8.02
9.00
7.64
7.69
7.15
6.59
7.28
6.40
9.11
8.91
7.72
7.59
8.18
8.46
7.98
8.09
7.40

4.38
3.49
3.55
3.40
3.24
4.53
3.26
6.17
7.62
6.45
6.56
5.86
5.66
6.22
5.39
7.98
7.74
6.66
6.55
7.20
7.37
6.98
7.15
6.29

3.33
2.67
2.73
2.60
2.46
3.66
2.38
4.66
6.34
5.30
5.48
4.69
4.72
5.17
4.44
6.84
6.56
5.66
5.54
6.20
6.37
6.02
6.21
5.23

2.23
1.77
1.93
1.72
1.54
2.40
1.34
2.57
4.26
3.42
3.72
2.86
3.18
3.44
2.90
4.70
4.37
3.80
3.62
4.32
4.37
4.14
4.39
3.32

1.42
1.08
1.26
1.12
0.94
1.45
0.59
1.10
2.13
1.42
1.72
1.12
1.45
1.56
1.26
2.24
1.85
1.57
1.41
1.86
2.04
1.82
2.07
1.30

1.94
1.84
1.31
1.59
1.88
1.97
2.00
1.69
1.65
0.86
0.76
1.30
0.84
0.87
0.66
1.00
0.95
0.48
0.76
0.28
0.73
0.56
0.49
0.93

338

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

700
700
700
700
700
700
150
250
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300

2,778
4,083
2,200
2,203
1,931
2,647
815
848
864
1,043
1,140
894
1,375
1,184
1,225
1,261
1,256
1,457
1,422
1,647
1,275
1,558
1,653
1,210

Granular Roadbed

50
58
65
60
54
48
52
20
15
11
13
13
14
13
15
8
6
7
6
5
9
6
7
9

25
33
34
39
43
24
31
24
15
24
20
29
24
22
27
17
23
28
32
27
18
24
20
29

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-02-27-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-06-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-09-2009

8

12

18

24

36

60

RMS
Error
(%)

8.16
9.61
8.69
8.04
11.64
11.30
10.25
10.14
10.29
11.16
10.89
9.91
10.34
8.72
10.43
9.89
8.97
10.85
10.01
9.32
8.93
9.52
10.26
9.40

7.44
8.67
7.97
7.30
10.46
10.15
9.17
8.97
9.18
9.97
9.68
9.00
9.14
7.76
9.33
9.00
7.97
9.91
9.09
8.42
8.02
8.72
9.26
8.53

6.90
7.91
7.40
6.70
9.29
9.06
8.18
7.93
8.30
8.95
8.69
8.18
8.08
6.96
8.36
8.20
7.12
9.06
8.28
7.64
7.28
8.08
8.41
7.75

6.00
6.86
6.55
5.80
7.89
7.64
6.84
6.62
7.09
7.55
7.29
7.07
6.63
5.92
7.04
7.12
5.90
7.83
7.11
6.56
6.25
7.11
7.28
6.72

5.20
5.87
5.75
4.88
6.56
6.26
5.65
5.43
5.94
6.25
6.03
6.04
5.31
4.93
5.83
6.01
4.86
6.66
5.97
5.51
5.20
6.12
6.21
5.73

3.60
3.97
4.08
3.24
4.25
3.90
3.51
3.28
3.88
4.02
3.82
4.12
3.13
3.16
3.70
3.94
3.02
4.53
3.91
3.61
3.36
4.21
4.25
3.86

1.59
1.71
1.85
1.36
1.94
1.57
1.32
1.16
1.51
1.74
1.50
1.83
1.10
1.29
1.51
1.50
1.22
2.19
1.72
1.48
1.32
1.78
2.05
1.67

0.46
0.51
0.41
0.93
1.31
1.38
1.00
0.97
0.34
1.08
0.74
0.54
1.30
0.81
0.97
0.75
1.18
1.13
1.29
0.83
0.82
0.59
0.74
0.63

339

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300

1,877
1,389
2,024
1,614
784
820
941
912
1,092
834
896
1,253
792
1,164
924
1,328
984
1,103
1,142
1,281
1,316
1,674
1,132
1,381

Granular Roadbed

7
8
5
9
11
9
8
8
7
10
8
8
9
11
9
5
12
10
9
8
8
5
12
8

29
23
29
30
16
21
26
30
25
18
23
20
29
26
22
33
26
16
21
26
30
31
17
23

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-09-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-03-13-2009
flex-M-M53-CS50015-04-09-2009
flex-M-M53-CS50015-04-09-2009
flex-M-M53-CS50015-04-09-2009
flex-M-M53-CS50015-04-09-2009
flex-M-M53-CS50015-04-09-2009

8

12

18

24

36

60

RMS
Error
(%)

9.93
9.32
8.12
9.51
9.45
8.13
10.42
10.08
9.03
8.68
8.71
9.69
9.12
9.61
8.91
7.90
9.57
8.87
7.73
12.96
12.53
13.11
13.28
12.84

9.00
8.31
7.39
8.51
8.69
7.31
9.53
9.19
8.24
7.85
7.90
8.84
8.31
8.79
7.92
7.15
8.63
8.15
6.93
10.98
10.54
11.26
11.41
10.99

8.27
7.43
6.80
7.72
8.07
6.60
8.71
8.41
7.50
7.18
7.33
8.08
7.64
8.16
7.19
6.62
7.91
7.62
6.34
9.57
9.09
9.88
10.01
9.54

7.19
6.24
5.93
6.65
7.16
5.65
7.51
7.27
6.46
6.18
6.44
6.99
6.56
7.12
6.01
5.73
6.72
6.76
5.39
7.55
7.10
8.09
8.03
7.54

6.14
5.11
5.09
5.59
6.27
4.71
6.39
6.08
5.43
5.14
5.56
5.94
5.59
6.12
4.94
4.89
5.69
5.83
4.51
5.86
5.45
6.48
6.44
6.00

4.22
3.15
3.44
3.69
4.39
3.05
4.38
4.04
3.63
3.37
3.89
4.12
3.82
4.31
3.09
3.36
3.78
4.09
2.97
3.30
2.96
3.89
3.92
3.53

1.93
1.15
1.52
1.61
1.93
1.30
2.17
1.78
1.55
1.34
1.72
2.02
1.71
2.08
1.22
1.54
1.69
1.81
1.30
1.18
0.96
1.41
1.80
1.47

0.57
1.03
0.87
0.78
0.57
1.04
1.18
1.20
0.84
0.84
0.29
0.88
0.67
0.66
1.17
0.62
0.95
0.63
0.88
1.26
1.12
0.46
1.75
1.51

340

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300

1,339
1,072
1,715
1,190
1,852
1,346
1,120
1,204
1,375
1,427
1,775
1,219
1,420
1,483
1,120
1,693
1,201
1,922
1,412
488
489
596
468
474

Granular Roadbed

9
9
8
10
4
12
12
9
9
8
6
12
9
9
11
11
11
5
13
10
10
8
14
13

19
32
27
22
32
28
16
21
25
31
26
17
22
18
29
25
21
31
27
24
29
22
16
20

Table B.1 (Cont'd)
Deflection (in mills) at the Specified Distance (in
inch) from the Center of the Loaded Area
0

File Title

flex-M-M53-CS50015-04-09-2009
flex-M-M53-CS50015-04-09-2009
flex-M-M53-CS50015-04-09-2009
flex-M-M53-CS50015-04-09-2009
flex-M-M53-CS50015-04-09-2009
flex-M-M53-CS50015-04-09-2009
flex-M-I94-CS77111-04-02-2008
flex-M-I94-CS77111-04-02-2008
flex-M-I94-CS77111-04-02-2008
flex-M-I94-CS77111-04-02-2008
flex-M-I94-CS77111-04-02-2008

8

12

18

24

36

60

RMS
Error
(%)

11.88
12.56
10.95
11.94
13.64
10.31
22.60
21.05
21.72
20.65
26.46

10.51
10.53
9.59
10.38
12.07
8.85
20.59
19.62
19.99
18.85
23.42

9.32
9.00
8.46
9.08
10.80
7.71
18.47
17.71
17.95
16.97
20.46

7.70
6.96
6.84
7.32
8.85
6.11
15.30
14.88
15.18
14.19
16.39

6.36
5.28
5.46
5.86
7.14
4.80
12.27
12.10
12.29
11.49
12.66

4.07
2.82
3.25
3.52
4.17
2.79
7.33
7.35
7.43
6.99
7.15

1.83
1.00
1.26
1.49
1.39
1.15
2.51
2.56
2.51
2.42
2.26

1.15
1.84
1.42
1.59
1.44
1.80
1.80
1.97
1.69
1.51
1.92

341

2-Layer Backcalculated
Resilient Modulus (ksi)

Depth to
Stiff
Layer (in)

AC

300
300
300
300
300
300
100
100
100
100
100

681
428
674
561
630
594
1,808
2,343
2,259
2,174
1,105

Granular Roadbed

12
12
11
13
6
15
12
11
10
13
12

17
27
24
20
24
25
5
5
5
5
5

Table B.2 Backcalculated Pavement Layer Moduli for Flexible Pavement (Three – Layer System)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-Su-US2-CS27022-05-20-2008
flex-Su-US2-CS27022-05-20-2008
flex-Su-US2-CS27022-05-20-2008
flex-Su-US2-CS27022-05-20-2008
flex-Su-US2-CS27022-05-20-2008
flex-Su-US2-CS27022-05-20-2008
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002

8

12

18

24

36

60

13.09
13.71
13.48
12.24
13.93
14.48
6.30
8.07
7.53
10.87
7.90
6.08
5.91
6.44
9.03
6.70
5.38
8.07
7.91
7.81
6.37
7.36
7.76

9.28
9.78
10.02
8.65
10.12
10.50
5.68
7.21
6.77
8.11
7.11
5.49
5.25
5.85
8.03
6.00
4.85
7.22
7.10
7.15
5.70
6.58
6.59

6.93
7.35
8.06
6.64
7.78
8.11
5.19
6.50
6.19
6.93
6.52
5.06
4.79
5.38
7.38
5.57
4.48
6.56
6.48
6.62
5.21
6.02
5.83

4.76
4.92
5.98
4.71
5.47
5.75
4.52
5.55
5.35
5.58
5.71
4.46
4.15
4.78
6.46
4.94
3.95
5.72
5.62
5.87
4.51
4.84
4.93

3.50
3.59
4.67
3.56
4.09
4.38
3.89
4.64
4.54
4.62
4.89
3.84
3.55
4.14
5.54
4.26
3.44
4.87
4.72
5.15
3.84
4.11
4.12

2.10
2.12
2.99
2.18
2.52
2.70
2.84
3.20
3.19
3.12
3.54
2.84
2.57
3.07
3.95
3.11
2.60
3.46
3.29
3.94
2.78
2.94
2.81

1.04
1.04
1.55
1.12
1.40
1.42
1.58
1.42
1.58
1.76
1.85
1.55
1.41
1.75
2.00
1.60
1.53
1.68
1.54
2.20
1.35
1.50
1.48

342

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.69
0.62
0.71
1.00
1.53
1.11
0.18
0.52
0.18
0.66
0.14
0.17
0.10
0.30
0.25
0.33
0.11
0.27
0.22
0.39
0.47
1.68
0.53

250
250
250
250
250
250
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

759
808
862
768
1,083
825
2,278
1,376
2,006
272
1,797
2,452
2,010
2,555
1,292
1,838
2,701
1,388
1,781
1,812
1,664
1,491
936

45
38
58
55
27
39
11
124
5
132
65
77
92
6
154
287
55
179
41
201
281
17
114

Subbase
31
30
28
33
41
30
42
8
22
29
13
20
26
60
9
9
39
9
10
12
10
27
23

Roadbed
25
25
18
24
19
19
25
31
26
21
22
27
28
23
22
29
26
26
28
19
33
25
26

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002

8

12

18

24

36

60

7.73
9.30
6.03
5.84
7.44
6.07
7.87
6.15
6.78
5.91
6.19
5.88
7.55
7.51
6.06
6.73
7.15
7.14
6.96
6.30
6.33
6.51
8.45

6.64
7.18
5.43
5.24
6.56
5.40
6.66
5.50
5.94
5.30
5.56
5.40
6.55
6.66
5.39
5.98
6.31
6.31
6.21
5.64
5.71
5.87
7.48

5.92
6.25
5.00
4.76
5.91
4.87
5.90
5.03
5.35
4.83
5.09
5.01
5.97
6.06
4.89
5.40
5.64
5.70
5.67
5.16
5.25
5.35
6.82

5.09
5.21
4.45
4.20
5.09
4.22
4.89
4.38
4.60
4.26
4.42
4.48
5.23
5.29
4.25
4.68
4.83
4.91
4.93
4.50
4.68
4.73
6.03

4.29
4.38
3.85
3.58
4.33
3.57
4.07
3.81
3.89
3.71
3.82
3.91
4.52
4.60
3.65
3.95
4.05
4.21
4.24
3.88
4.12
4.08
5.31

3.05
3.15
2.92
2.65
3.15
2.59
2.84
2.86
2.71
2.81
2.81
3.03
3.45
3.36
2.69
2.80
2.85
3.03
3.11
2.88
3.15
3.06
3.91

1.60
1.89
1.73
1.46
1.82
1.45
1.66
1.64
1.37
1.57
1.55
1.77
2.02
1.85
1.51
1.30
1.47
1.75
1.78
1.64
1.86
1.73
2.36

343

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.33
0.49
0.32
0.43
0.23
0.35
0.28
0.23
0.25
0.44
0.19
0.35
0.31
0.28
0.23
0.45
0.35
0.36
0.11
0.11
0.22
0.32
0.77

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

868
366
2,277
2,005
1,496
1,986
1,082
1,744
1,378
1,606
2,042
2,864
915
1,282
1,773
1,366
1,438
1,637
1,881
1,989
1,779
1,885
1,244

231
153
78
158
13
13
6
173
158
388
90
91
309
222
126
294
67
8
12
70
292
137
117

Subbase
18
40
34
24
55
55
170
28
17
19
24
25
27
17
29
9
20
81
46
29
23
23
25

Roadbed
24
20
23
27
21
26
22
24
29
26
25
23
19
22
26
35
26
22
21
24
21
23
16

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002

8

12

18

24

36

60

8.94
11.34
10.73
10.81
10.33
8.71
10.01
10.51
7.05
7.64
8.37
7.90
8.13
8.40
10.37
6.30
6.32
8.08
7.91
9.03
9.67
6.92
6.43

7.89
9.36
8.75
8.86
8.69
7.86
8.34
8.02
6.13
6.72
7.00
6.86
7.10
7.26
8.75
5.55
5.69
7.12
6.58
7.99
8.34
6.10
5.54

7.14
8.03
7.52
7.51
7.50
7.15
7.40
6.81
5.51
6.05
6.07
6.07
6.35
6.47
7.76
5.01
5.16
6.48
5.97
7.17
7.44
5.43
4.93

6.18
6.42
6.03
6.01
6.10
6.19
6.30
5.47
4.73
5.21
4.95
5.05
5.38
5.50
6.57
4.36
4.52
5.62
5.04
6.10
6.31
4.60
4.21

5.33
5.20
4.91
4.84
4.97
5.30
5.28
4.39
4.00
4.41
3.98
4.18
4.53
4.63
5.47
3.78
3.93
4.83
4.20
5.19
5.30
3.85
3.57

3.90
3.44
3.30
3.22
3.32
3.79
3.69
2.82
2.84
3.20
2.60
2.82
3.14
3.29
3.65
2.83
2.91
3.56
2.99
3.70
3.69
2.76
2.53

2.21
1.81
1.77
1.66
1.72
1.96
1.81
1.45
1.56
1.84
1.29
1.44
1.68
1.80
1.90
1.73
1.75
2.00
1.64
2.09
1.97
1.55
1.45

344

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.22
0.42
0.35
0.64
0.48
0.26
0.33
0.53
0.30
0.20
0.23
0.30
0.30
0.22
0.84
0.28
0.41
0.10
0.49
0.82
0.28
0.43
0.41

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,083
535
508
488
648
1,583
460
324
1,326
1,418
810
1,210
1,251
958
720
1,591
2,106
1,159
758
1,235
865
1,476
1,297

103
27
44
49
36
28
299
124
81
15
49
13
21
94
73
61
6
142
174
5
67
7
73

Subbase
21
23
25
22
21
13
11
21
27
45
22
30
26
23
16
51
181
21
25
88
18
100
39

Roadbed
17
20
21
22
21
20
22
25
24
20
28
26
22
21
20
22
22
19
23
18
19
24
26

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-US131-CS67017-05-01-2002
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001

8

12

18

24

36

60

10.59
12.52
14.16
14.32
11.80
12.57
13.28
12.30
11.88
11.93
11.98
13.00
13.15
13.18
13.27
13.57
13.45
12.98
12.44
12.42
13.00
14.85
16.42

9.21
9.56
10.68
10.88
9.06
9.67
10.15
9.26
8.79
8.95
8.65
9.57
9.78
10.48
10.29
10.16
9.86
9.74
9.45
9.34
9.78
11.27
12.72

8.18
7.69
8.46
8.49
7.20
7.71
7.92
7.27
6.78
7.04
6.61
7.30
7.61
8.40
8.22
8.03
7.77
7.68
7.45
7.43
7.80
8.93
10.03

6.85
5.56
6.10
5.92
5.24
5.62
5.56
5.27
4.81
4.96
4.65
5.15
5.39
6.23
6.07
5.93
5.69
5.70
5.60
5.50
5.76
6.52
7.29

5.68
4.25
4.65
4.45
4.07
4.37
4.18
4.09
3.73
3.81
3.62
3.95
4.12
4.88
4.78
4.69
4.53
4.57
4.45
4.40
4.57
5.09
5.66

3.83
2.77
2.96
2.77
2.69
2.87
2.65
2.73
2.47
2.48
2.44
2.59
2.69
3.31
3.28
3.20
3.20
3.27
3.19
3.15
3.22
3.37
3.62

1.86
1.62
1.62
1.53
1.60
1.61
1.47
1.53
1.42
1.43
1.42
1.45
1.46
1.97
1.97
1.94
1.95
2.01
2.00
1.96
1.92
1.92
1.97

345

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.29
0.74
1.02
1.49
1.03
1.25
1.52
1.44
1.42
1.25
1.42
1.61
1.64
1.32
1.12
0.89
0.89
1.11
0.99
0.98
1.05
1.17
1.49

846
354
278
276
366
330
300
293
290
319
258
248
256
355
322
276
251
278
308
298
283
256
243

49
8
14
9
9
13
9
18
14
10
16
16
19
7
8
11
13
12
10
11
13
13
12

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
13
88
34
43
92
44
51
42
58
70
60
43
35
93
83
65
70
83
106
97
62
37
26

Roadbed
20
22
22
23
23
22
24
23
25
25
25
24
24
18
18
18
18
18
18
18
19
18
18

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)

8

12

18

24

36

60

13.39
17.09
13.23
14.37
13.30
16.85
12.43
15.14
15.10
12.95
12.52
14.16
14.32
11.80
12.57
13.28
12.30
11.88
11.93
11.98
13.00
13.15
13.18

10.13
12.65
9.97
10.43
9.81
12.57
9.38
11.71
11.73
9.97
9.56
10.68
10.88
9.06
9.67
10.15
9.26
8.79
8.95
8.65
9.57
9.78
10.48

7.98
10.15
7.83
8.00
7.82
10.11
7.40
9.38
9.44
8.03
7.69
8.46
8.49
7.20
7.71
7.92
7.27
6.78
7.04
6.61
7.30
7.61
8.40

5.84
7.64
5.73
5.76
5.76
7.49
5.47
7.02
7.09
5.95
5.56
6.10
5.92
5.24
5.62
5.56
5.27
4.81
4.96
4.65
5.15
5.39
6.23

4.65
5.94
4.57
4.54
4.58
5.88
4.32
5.52
5.60
4.79
4.25
4.65
4.45
4.07
4.37
4.18
4.09
3.73
3.81
3.62
3.95
4.12
4.88

3.16
3.82
3.13
3.14
3.21
3.82
2.98
3.61
3.69
3.35
2.77
2.96
2.77
2.69
2.87
2.65
2.73
2.47
2.48
2.44
2.59
2.69
3.31

1.92
2.01
1.94
1.83
1.86
2.04
1.81
1.92
1.97
1.98
1.62
1.62
1.53
1.60
1.61
1.47
1.53
1.42
1.43
1.42
1.45
1.46
1.97

346

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.20
0.71
1.15
1.44
1.14
0.97
0.97
1.29
1.32
1.28
0.74
1.02
1.49
1.03
1.25
1.52
1.44
1.42
1.25
1.42
1.61
1.64
1.32

287
186
285
211
250
200
309
253
257
309
354
278
276
366
330
300
293
290
319
258
248
256
354

10
35
9
15
20
29
11
26
27
13
8
14
9
9
13
9
18
14
10
16
16
19
7

700
700
700
700
700
700
700
700
700
700
701
702
703
704
705
706
707
708
709
710
711
712
713

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
73
18
94
47
44
20
82
22
22
57
88
34
43
92
44
51
42
58
70
60
43
35
91

Roadbed
19
17
18
19
19
17
20
18
18
18
22
22
23
23
22
24
23
25
25
25
24
24
18

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-I75-CS69014-11-12-1997

8

12

18

24

36

60

13.27
13.11
13.57
13.45
12.98
12.44
12.42
13.00
14.85
16.42
13.39
17.09
13.30
14.13
14.18
14.37
13.30
16.85
12.43
15.14
15.10
12.95
16.77

10.29
10.05
10.16
9.86
9.74
9.45
9.34
9.78
11.27
12.72
10.13
12.65
10.00
10.38
10.46
10.43
9.81
12.57
9.38
11.71
11.73
9.97
12.56

8.22
8.02
8.03
7.77
7.68
7.45
7.43
7.80
8.93
10.03
7.98
10.15
7.90
8.03
8.16
8.00
7.82
10.11
7.40
9.38
9.44
8.03
10.31

6.07
5.95
5.93
5.69
5.70
5.60
5.50
5.76
6.52
7.29
5.84
7.64
5.80
5.82
5.93
5.76
5.76
7.49
5.47
7.02
7.09
5.95
8.15

4.78
4.72
4.69
4.53
4.57
4.45
4.40
4.57
5.09
5.66
4.65
5.94
4.60
4.54
4.64
4.54
4.58
5.88
4.32
5.52
5.60
4.79
6.26

3.28
3.30
3.20
3.20
3.27
3.19
3.15
3.22
3.37
3.62
3.16
3.82
3.19
3.14
3.16
3.14
3.21
3.82
2.98
3.61
3.69
3.35
3.90

1.97
2.01
1.93
1.94
2.01
2.00
1.96
1.92
1.93
1.97
1.92
2.01
1.94
1.89
1.90
1.87
1.86
2.04
1.81
1.92
1.98
2.01
2.05

347

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.12
1.02
0.90
0.92
1.11
0.99
0.98
1.05
1.12
1.49
1.20
0.71
1.01
1.07
0.93
1.28
1.14
0.97
0.97
1.29
1.27
1.19
1.11

322
307
275
250
276
307
298
283
258
243
287
186
280
237
245
217
250
200
309
253
260
313
261

8
10
11
13
12
10
11
13
12
12
10
35
10
11
10
13
20
29
11
26
25
12
50

714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
83
82
63
68
80
106
97
62
39
26
73
18
78
68
64
57
44
20
82
22
23
66
16

Roadbed
18
18
19
18
18
18
18
19
18
18
19
17
18
19
19
19
19
17
20
18
18
18
18

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997

8

12

18

24

36

60

10.12
7.40
11.26
9.17
8.03
10.67
7.91
11.69
9.21
12.64
7.44
11.50
9.84
7.76
9.80
10.67
8.66
7.05
6.89
7.01
6.85
8.58
8.07

7.80
6.22
8.03
5.79
6.85
8.35
6.50
8.58
8.15
7.99
6.26
9.49
8.39
6.77
8.39
8.07
7.72
6.06
5.94
5.98
5.87
7.01
6.73

6.57
5.31
6.30
4.65
5.98
6.46
5.47
7.09
7.24
6.22
5.31
7.99
7.13
5.98
7.32
6.57
6.69
5.35
5.28
5.24
5.16
5.94
5.83

5.31
4.37
4.69
3.58
4.88
4.72
4.29
5.51
6.02
4.29
4.29
6.18
5.59
5.04
5.98
5.12
5.63
4.53
4.37
4.41
4.33
4.53
4.76

4.17
3.46
3.58
2.76
3.90
3.31
3.31
4.25
4.88
3.03
3.27
4.72
4.41
4.09
4.76
3.94
4.57
3.62
3.54
3.54
3.46
3.54
3.74

2.80
2.32
2.44
1.77
2.44
1.89
2.09
2.68
3.11
1.73
2.05
2.72
2.76
2.80
3.15
2.56
3.15
2.44
2.44
2.40
2.40
2.28
2.32

1.61
1.38
1.50
1.14
1.06
0.98
1.02
1.57
1.50
0.91
1.06
1.22
1.50
1.38
1.61
1.38
1.77
1.34
1.30
1.38
1.38
1.14
0.91

348

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
1.11
0.70
0.79
0.22
0.48
0.50
0.78
0.35
0.89
0.45
0.23
1.03
0.59
1.30
0.55
0.82
1.81
0.68
1.17
0.19
1.25
0.89
0.44

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

557
370
805
1,397
1,016
1,652
966
1,881
853
957
1,725
605
934
323
1,526
322
450
366
724
771
209
1,440
1,573

61
25
23
70
50
79
68
34
50
154
56
21
36
68
70
146
12
57
77
88
94
11
11

Subbase
36
65
28
16
30
20
16
38
30
12
25
35
39
23
35
16
145
33
36
34
33
398
324

Roadbed
24
26
21
36
36
29
29
30
32
44
38
38
21
33
27
44
21
28
27
28
29
21
22

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999

8

12

18

24

36

60

7.83
8.50
6.85
10.16
7.52
9.65
7.32
11.18
8.74
8.43
8.35
7.64
7.32
7.64
7.68
8.35
7.91
9.25
10.63
9.41
8.86
9.33
9.65

6.34
6.85
5.87
7.80
6.34
7.95
6.22
8.11
6.93
6.77
6.38
5.71
5.59
5.94
5.75
6.02
5.87
6.97
8.07
7.32
6.61
6.93
6.97

5.31
5.67
5.16
6.14
5.39
6.89
5.51
6.61
5.83
5.79
5.00
4.41
4.53
4.80
4.72
4.65
4.65
5.55
6.46
6.02
5.28
5.43
5.28

4.13
4.33
4.17
4.53
4.37
5.67
4.65
5.04
4.80
4.65
3.78
3.43
3.58
3.82
3.66
3.66
3.70
4.33
5.08
4.88
4.21
4.17
4.02

3.11
3.31
3.35
3.31
3.35
4.53
3.78
3.86
3.78
3.74
2.83
2.52
2.72
2.91
2.87
2.83
2.80
3.27
3.90
3.82
3.31
3.15
2.95

1.89
1.97
2.17
1.85
1.89
3.15
2.64
2.48
2.52
2.52
1.81
1.73
1.89
2.01
1.97
2.05
1.97
2.20
2.60
2.72
2.20
2.05
1.97

0.91
1.10
1.02
0.94
0.79
1.81
1.46
1.38
1.42
1.38
0.98
1.02
1.10
1.18
1.26
1.26
1.14
1.30
1.46
1.65
1.26
1.14
1.06

349

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.72
1.02
1.19
0.55
0.16
0.82
0.75
0.61
0.93
0.54
1.01
1.65
1.16
1.14
1.09
1.37
1.49
1.12
0.99
1.03
1.21
1.03
1.65

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

874
932
510
1,562
1,382
268
1,596
1,580
1,171
1,035
520
531
625
657
642
380
458
475
386
526
404
406
316

45
20
14
35
90
107
32
18
12
13
42
39
50
41
31
52
60
35
43
39
65
45
50

Subbase
68
49
101
43
35
36
58
66
100
127
42
78
62
64
126
77
54
54
31
54
37
38
37

Roadbed
30
32
22
36
36
33
26
32
32
36
35
34
32
29
28
28
30
27
24
21
28
30
32

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999

8

12

18

24

36

60

9.72
8.43
8.46
7.28
7.17
7.28
7.20
7.32
8.74
8.43
10.39
10.08
11.57
10.51
8.70
9.84
9.37
10.04
10.31
7.68
9.06
9.88
9.21

6.73
6.30
6.02
5.31
5.28
5.55
5.59
5.51
6.26
6.50
7.99
7.52
8.43
7.76
6.42
6.93
7.09
7.40
7.17
5.31
6.38
6.77
6.54

4.96
5.04
4.69
4.17
4.25
4.57
4.57
4.53
4.96
5.31
6.46
5.71
6.54
6.18
5.20
5.28
5.79
5.94
5.55
3.98
5.04
5.16
5.04

3.62
3.94
3.50
3.35
3.31
3.62
3.78
3.66
3.86
4.17
5.04
4.29
4.92
4.88
4.17
4.02
4.72
4.72
4.21
3.03
3.94
3.90
3.86

2.60
3.03
2.60
2.52
2.44
2.83
2.95
2.95
2.95
3.35
3.78
3.07
3.66
3.78
3.31
3.07
3.74
3.70
3.19
2.24
3.07
2.99
2.99

1.69
2.01
1.69
1.69
1.61
1.93
2.09
2.05
2.01
2.17
2.36
1.89
2.32
2.72
2.32
2.13
2.64
2.56
2.13
1.54
2.13
2.13
1.93

0.91
1.14
0.91
0.98
0.91
1.14
1.18
1.18
1.10
1.18
1.14
0.98
1.22
1.61
1.42
1.22
1.50
1.42
1.26
0.87
1.26
1.26
1.06

350

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.64
0.92
0.89
1.74
1.28
0.83
1.34
0.71
0.91
0.88
0.91
1.57
0.95
1.08
1.05
1.17
0.98
0.88
1.12
1.60
0.89
0.97
1.11

273
464
359
478
565
631
568
475
334
508
411
377
286
331
405
278
370
308
286
338
311
260
297

46
54
59
67
56
56
91
98
72
68
52
36
43
45
61
51
78
69
43
65
62
48
65

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
40
42
38
53
51
57
40
42
37
30
18
31
25
46
52
47
31
30
46
57
49
58
34

Roadbed
37
30
37
35
38
30
30
30
31
29
29
33
28
22
25
28
23
24
27
39
28
27
32

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999

8

12

18

24

36

60

7.68
9.21
9.49
10.31
10.39
9.21
8.74
9.09
8.58
7.99
7.83
7.28
7.52
7.99
7.28
7.28
7.95
9.02
10.20
10.08
7.83
8.90
8.15

5.31
6.54
7.09
7.17
7.44
6.34
5.91
6.73
5.87
5.59
5.59
5.20
5.51
5.71
5.31
5.59
6.02
6.61
7.48
7.28
5.75
6.73
6.18

4.13
5.00
5.75
5.51
5.71
4.80
4.49
5.35
4.45
4.17
4.33
4.13
4.41
4.41
4.17
4.57
4.92
5.24
5.98
5.75
4.57
5.39
5.04

3.19
3.82
4.53
4.06
4.33
3.50
3.39
4.02
3.23
2.91
3.15
2.99
3.35
3.35
3.15
3.43
3.86
4.02
4.57
4.41
3.46
4.25
4.02

2.44
2.87
3.50
2.95
3.39
2.68
2.56
3.03
2.40
2.05
2.28
2.20
2.56
2.52
2.32
2.60
2.95
3.03
3.50
3.35
2.64
3.31
3.23

1.57
1.89
2.40
1.85
2.24
1.81
1.73
1.89
1.50
1.22
1.50
1.38
1.69
1.69
1.54
1.77
1.97
2.09
2.36
2.28
1.77
2.32
2.40

0.94
1.02
1.34
0.98
1.26
1.02
1.06
1.06
0.79
0.63
0.79
0.79
0.98
0.98
0.87
0.98
1.14
1.14
1.38
1.34
1.02
1.46
1.50

351

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.82
1.19
0.78
0.81
1.10
0.86
1.38
0.84
0.68
0.97
1.31
0.60
0.62
1.02
0.98
1.01
0.90
1.20
0.58
0.89
0.60
1.04
0.68

381
302
380
282
271
283
309
456
295
381
407
533
515
406
509
630
585
367
366
344
475
502
484

63
61
60
46
53
52
48
36
62
48
56
41
51
52
50
47
45
57
39
41
50
33
54

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
57
36
33
32
35
50
69
42
37
43
45
64
59
59
58
56
51
38
44
47
56
84
76

Roadbed
37
33
26
34
27
33
33
31
42
52
43
43
35
35
39
35
30
30
25
26
33
24
23

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)

8

12

18

24

36

60

8.46
7.52
7.05
6.57
6.77
5.98
7.36
7.05
8.03
7.48
7.64
9.06
7.17
8.50
7.20
6.81
7.60
7.13
6.10
6.73
7.60
6.26
7.28

6.54
5.51
5.39
5.00
4.96
4.37
5.59
5.31
5.94
5.59
5.83
6.61
5.43
6.46
5.31
5.00
5.63
5.24
4.61
4.84
5.55
4.45
5.43

5.24
4.41
4.53
3.86
3.86
3.50
4.45
4.25
4.61
4.45
4.69
5.31
4.33
5.20
4.13
3.90
4.29
4.13
3.66
3.82
4.37
3.54
4.33

4.09
3.43
3.58
2.91
2.87
2.76
3.54
3.43
3.58
3.43
3.70
4.13
3.35
4.02
3.15
2.95
3.15
3.15
2.91
2.83
3.39
2.72
3.43

3.11
2.64
2.91
2.20
2.13
2.13
2.72
2.64
2.72
2.56
2.87
3.27
2.64
3.03
2.36
2.17
2.24
2.40
2.20
2.13
2.56
2.09
2.56

2.09
1.81
1.89
1.46
1.50
1.50
1.93
1.89
1.89
1.73
2.01
2.28
1.73
1.97
1.46
1.30
1.42
1.61
1.57
1.34
1.65
1.38
1.69

1.26
1.10
1.10
0.91
0.91
0.98
1.22
1.22
1.14
1.10
1.30
1.46
1.02
1.14
0.87
0.75
0.79
0.98
0.91
0.79
0.94
0.83
0.94

352

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.09
0.97
1.43
1.30
1.11
1.56
1.37
1.54
1.34
1.26
1.22
1.06
1.10
0.96
1.79
1.74
1.28
0.95
1.57
1.09
1.27
1.24
1.37

613
512
678
728
582
733
637
664
473
671
677
433
600
576
616
663
526
568
631
585
488
555
551

26
48
70
29
38
43
36
38
43
23
27
39
52
33
36
37
35
42
75
46
57
66
62

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
85
73
45
179
132
200
126
144
77
211
176
82
61
56
76
70
62
90
69
74
50
76
46

Roadbed
27
31
32
39
39
36
29
29
31
32
27
24
34
30
40
46
43
35
38
44
37
42
37

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)

8

12

18

24

36

60

7.44
7.91
6.89
7.17
9.21
8.86
7.64
8.19
7.87
8.86
7.09
9.33
7.83
7.48
7.01
7.60
9.88
8.50
9.76
9.09
8.62
8.62
8.58

5.51
5.94
4.84
5.16
6.69
6.54
5.83
6.02
5.87
6.54
5.16
6.81
5.31
5.00
5.00
5.59
7.17
6.18
7.01
6.73
6.18
5.98
6.10

4.53
4.80
3.74
4.06
5.16
5.12
4.72
4.84
4.69
5.20
4.09
5.43
4.09
3.66
3.90
4.37
5.55
4.76
5.47
5.39
4.76
4.57
4.69

3.58
3.78
2.76
3.11
3.74
4.02
3.78
3.78
3.70
4.09
3.19
4.17
2.99
2.44
3.03
3.43
4.17
3.54
4.13
4.25
3.62
3.43
3.66

2.72
2.95
2.05
2.40
2.68
3.23
2.91
2.91
2.87
3.23
2.40
3.11
2.09
1.69
2.28
2.68
3.19
2.60
3.19
3.31
2.72
2.64
2.83

1.85
2.01
1.30
1.57
1.65
2.36
1.97
1.97
1.97
2.20
1.57
2.01
1.26
0.98
1.61
1.89
2.09
1.57
2.09
2.24
1.77
1.77
1.97

1.06
1.26
0.75
0.94
0.91
1.46
1.14
1.18
1.22
1.30
0.94
1.14
0.71
0.51
1.02
1.14
1.22
0.87
1.18
1.30
1.02
1.14
1.26

353

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.18
1.27
0.93
1.30
0.83
1.03
1.13
1.06
1.30
0.97
1.55
1.13
1.69
0.74
1.52
1.10
0.97
1.18
0.76
0.92
1.20
1.71
1.71

544
585
481
490
414
370
585
479
529
385
561
419
417
352
511
446
350
442
320
393
385
374
378

63
37
54
57
33
52
56
48
44
59
49
41
44
51
44
58
38
40
50
56
47
36
42

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
49
87
65
66
45
72
49
58
75
45
70
41
53
49
122
70
47
42
38
41
50
100
87

Roadbed
33
28
46
37
37
24
30
29
29
27
37
30
47
63
34
30
28
39
29
27
33
31
28

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997

8

12

18

24

36

60

7.95
7.01
7.48
5.79
7.20
6.81
6.61
7.76
7.36
8.66
8.15
8.62
9.06
7.01
7.60
7.17
6.61
7.20
14.88
7.87
7.68
12.36
11.46

5.16
4.88
5.04
4.17
5.00
4.76
4.61
5.55
5.24
6.10
6.02
6.46
6.61
5.16
5.67
5.31
4.76
5.39
12.56
6.61
6.30
9.29
9.29

3.74
3.74
3.74
3.35
3.78
3.66
3.46
4.45
4.13
4.80
4.80
5.12
5.20
4.09
4.65
4.29
3.86
4.37
10.67
5.71
5.35
7.64
7.87

2.60
2.64
2.72
2.52
2.76
2.72
2.52
3.35
3.11
3.62
3.70
4.02
3.90
3.11
3.66
3.39
3.03
3.39
8.54
4.69
4.37
5.79
6.18

1.81
1.89
1.93
1.89
2.01
2.01
1.81
2.52
2.36
2.72
2.76
2.99
3.03
2.32
2.83
2.60
2.36
2.60
6.69
3.82
3.50
4.45
4.88

1.10
1.14
1.26
1.30
1.30
1.30
1.22
1.65
1.57
1.89
1.85
2.01
2.09
1.50
2.01
1.89
1.61
1.77
4.21
2.60
2.40
2.91
3.19

0.63
0.67
0.75
0.79
0.79
0.79
0.75
0.98
0.91
1.22
1.14
1.22
1.26
0.91
1.22
1.22
1.06
1.14
2.13
1.50
1.42
1.73
1.77

354

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
1.22
0.96
1.44
0.83
1.25
1.34
1.21
0.99
0.58
1.32
1.29
1.51
0.55
1.27
0.88
1.22
1.98
1.20
0.51
0.51
0.64
0.66
0.24

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

321
536
398
696
474
520
525
501
448
447
573
544
402
648
553
618
649
723
697
1,285
1,107
444
686

45
37
45
53
41
46
39
44
61
28
28
30
39
33
51
37
43
26
11
31
37
23
23

Subbase
63
88
85
120
98
93
142
68
59
144
106
80
68
99
71
156
144
213
23
58
68
51
36

Roadbed
53
52
47
45
45
45
47
36
39
29
31
29
28
38
29
29
33
31
18
26
28
22
21

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997

8

12

18

24

36

60

8.39
8.11
9.53
8.50
10.31
8.11
7.91
10.98
6.77
6.85
6.77
7.91
9.41
9.13
10.31
10.16
10.87
8.58
8.11
10.98
8.39
6.73
9.92

7.05
6.85
7.52
7.40
8.39
6.65
6.38
8.46
5.43
5.75
5.59
6.30
7.87
7.68
8.58
7.91
8.39
6.57
6.73
7.48
7.01
5.67
7.52

5.98
5.83
6.18
6.69
7.13
5.59
5.43
6.85
4.57
4.92
4.76
5.39
6.77
6.65
7.24
6.54
6.73
5.39
5.79
5.83
5.98
4.88
5.83

4.57
4.45
4.84
5.79
5.67
4.33
4.25
5.12
3.70
4.06
3.90
4.29
5.67
5.55
5.83
5.20
4.96
4.13
4.76
4.37
4.80
3.98
4.29

3.58
3.54
3.82
4.80
4.53
3.31
3.27
3.86
2.87
3.19
3.03
3.43
4.53
4.45
4.53
4.06
3.58
3.15
3.66
3.31
3.78
3.15
3.07

2.36
2.36
2.36
3.50
2.99
2.09
2.09
2.40
1.85
2.13
2.05
2.32
3.19
3.15
2.99
2.80
2.05
2.01
2.36
2.13
2.60
2.05
1.73

1.34
1.38
1.22
2.13
1.65
1.14
1.10
1.34
0.94
1.14
1.14
1.30
1.77
1.77
1.65
1.61
0.91
1.10
1.30
1.26
1.50
1.02
0.79

355

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.93
1.03
0.96
0.68
0.34
0.32
0.35
0.41
0.83
0.74
0.84
0.24
0.84
0.73
0.66
0.68
0.70
0.49
1.05
1.42
0.57
0.41
1.06

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,076
1,138
625
1,903
734
1,086
1,017
534
1,004
1,438
1,320
820
890
983
881
536
486
648
1,398
293
1,095
1,447
458

14
13
52
11
35
14
32
23
78
38
36
61
54
47
17
44
37
44
9
45
20
51
43

Subbase
176
264
25
245
32
140
44
46
32
46
63
39
28
32
54
41
19
43
370
46
91
30
23

Roadbed
28
28
31
18
23
33
34
28
41
34
33
29
22
22
23
24
39
34
30
30
25
37
44

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997

8

12

18

24

36

60

7.09
10.16
11.30
9.88
10.94
7.76
9.92
12.01
8.74
7.24
9.21
7.60
10.71
9.53
8.27
8.43
8.54
8.15
9.53
7.68
7.60
7.24
7.60

6.06
7.87
8.70
6.81
7.76
6.02
7.52
9.09
7.13
6.18
7.36
6.22
8.74
7.68
6.85
6.93
6.93
6.77
7.72
6.38
6.54
6.06
6.46

5.24
6.10
7.13
5.12
5.94
5.08
6.14
7.13
5.98
5.31
6.06
5.24
7.24
6.38
5.83
5.94
5.83
5.79
6.30
5.39
5.71
5.24
5.71

4.41
4.49
5.59
3.70
4.13
4.02
4.88
5.28
4.76
4.29
4.65
4.17
5.63
5.12
4.72
4.84
4.65
4.57
4.92
4.33
4.69
4.25
4.69

3.46
3.31
4.21
2.72
3.19
3.07
3.70
3.90
3.78
3.35
3.58
3.15
4.25
3.98
3.66
3.90
3.46
3.58
3.70
3.31
3.74
3.31
3.86

2.24
1.93
2.60
1.65
1.97
1.93
2.32
2.36
2.56
2.20
2.20
2.05
2.56
2.64
2.44
2.72
2.09
2.28
2.24
2.09
2.60
2.20
2.68

0.98
0.94
1.46
0.91
1.02
0.94
1.30
1.34
1.50
1.22
1.14
1.10
1.30
1.38
1.34
1.61
0.91
1.18
1.18
1.06
1.42
1.26
1.61

356

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.94
1.22
1.38
1.01
1.44
0.71
1.58
0.96
0.45
0.57
0.54
0.89
0.60
0.79
0.74
0.40
0.90
0.19
0.93
0.72
0.70
0.62
0.30

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,465
482
572
317
285
736
558
445
874
1,560
726
1,118
776
650
1,090
985
893
1,120
816
1,223
1,459
1,482
1,598

77
36
22
48
49
77
39
19
28
10
34
23
14
55
25
33
48
26
17
22
27
12
13

Subbase
14
27
41
41
32
25
36
49
66
397
33
66
40
25
52
62
18
40
51
47
49
361
323

Roadbed
41
37
25
40
36
40
29
28
25
31
32
34
28
27
28
23
40
31
31
34
27
30
23

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999

8

12

18

24

36

60

8.07
8.11
8.27
6.77
7.44
7.36
7.17
9.45
6.93
7.60
7.64
7.99
7.40
11.22
8.54
8.46
8.23
9.09
9.06
8.07
9.37
9.02
10.51

6.42
6.81
6.61
5.55
5.87
6.06
5.91
7.17
5.67
6.34
6.34
6.42
6.10
8.90
6.38
6.02
5.98
6.65
6.14
5.31
6.97
6.77
7.56

5.31
5.94
5.55
4.65
4.80
5.08
4.96
5.98
4.88
5.47
5.39
5.47
5.16
7.28
4.92
4.92
4.69
5.28
4.61
4.06
5.63
5.51
6.02

4.17
4.80
4.37
3.62
3.70
4.06
3.90
4.57
3.98
4.53
4.37
4.33
4.13
5.47
3.78
3.86
3.66
4.17
3.39
3.07
4.45
4.37
4.69

3.19
3.82
3.39
2.68
2.72
3.11
3.07
3.46
3.07
3.54
3.43
3.39
3.19
4.09
2.99
2.99
2.87
3.35
2.56
2.36
3.50
3.35
3.58

1.93
2.48
2.13
1.65
1.61
2.01
1.97
2.09
1.97
2.32
2.28
2.28
2.09
2.60
2.01
2.05
2.09
2.40
1.73
1.65
2.52
2.32
2.44

0.91
1.34
1.22
0.83
0.83
1.10
1.06
1.14
1.06
1.26
1.22
1.34
1.22
1.50
1.22
1.26
1.34
1.46
1.06
0.98
1.54
1.38
1.42

357

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.64
0.32
0.94
0.88
0.84
0.72
0.49
1.23
0.98
0.91
0.60
0.44
0.67
0.39
1.45
1.43
1.07
0.84
1.09
0.84
0.74
1.07
0.94

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

782
1,399
1,019
1,245
948
1,188
1,147
669
1,451
1,425
1,110
976
1,291
615
433
416
427
345
308
280
397
472
312

60
12
15
23
27
20
32
28
19
18
42
25
12
12
43
52
42
60
41
68
48
44
47

Subbase
23
123
154
60
51
88
54
42
89
73
38
88
400
113
64
59
107
55
77
69
57
51
39

Roadbed
40
28
31
44
43
34
35
32
35
30
31
28
31
25
28
28
26
24
33
36
23
25
24

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999

8

12

18

24

36

60

9.65
9.37
8.46
9.92
9.21
9.45
10.35
9.09
8.58
8.62
7.83
10.04
9.88
9.09
10.43
10.28
9.76
9.37
9.09
8.31
9.09
9.45
9.49

6.73
6.65
5.79
7.24
6.34
6.57
6.93
6.26
6.10
6.02
5.43
6.81
6.54
5.87
6.97
7.13
6.77
6.61
6.34
5.94
6.61
6.65
6.50

5.20
5.28
4.41
5.79
5.04
5.16
5.04
4.92
4.84
4.72
4.09
5.08
4.92
4.37
5.28
5.47
5.16
5.08
4.84
4.57
5.28
5.16
5.04

3.78
4.09
3.35
4.76
4.02
3.98
3.66
3.78
3.78
3.50
3.07
3.74
3.78
3.35
4.06
4.13
3.82
3.82
3.62
3.46
4.09
3.94
3.94

2.83
3.11
2.48
3.74
3.07
2.95
2.76
2.95
2.87
2.52
2.40
2.87
2.95
2.48
3.15
3.15
2.95
2.83
2.72
2.56
3.07
2.95
2.91

1.81
2.13
1.61
2.68
2.17
1.93
1.81
1.89
1.97
1.61
1.65
1.93
2.13
1.69
2.24
2.09
2.01
1.81
1.73
1.65
1.97
2.05
2.01

1.02
1.18
0.91
1.65
1.30
1.10
1.06
1.10
1.22
0.94
1.02
1.10
1.26
0.98
1.30
1.22
1.22
0.94
0.94
0.87
1.06
1.18
1.18

358

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.53
0.98
1.26
1.57
1.48
1.43
1.33
1.55
1.51
1.36
1.20
1.03
1.10
1.59
1.14
1.03
0.87
1.02
0.94
1.24
1.07
1.14
1.68

316
309
310
321
282
317
231
295
405
415
354
239
213
228
203
270
293
294
300
351
378
308
285

43
64
62
59
65
52
41
65
45
35
51
50
59
63
58
45
40
59
57
64
58
48
52

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
43
37
45
48
49
40
52
40
68
60
86
47
58
53
47
43
63
31
37
35
31
49
49

Roadbed
33
29
38
21
27
31
32
31
28
36
34
31
27
35
26
28
28
35
35
38
32
29
29

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999

8

12

18

24

36

60

8.50
9.69
9.57
8.31
8.43
9.37
10.63
10.08
9.96
10.71
11.34
9.76
10.39
10.20
10.35
9.45
9.92
10.04
10.35
9.29
9.76
9.29
9.09

6.38
7.32
7.13
6.02
5.91
6.81
8.03
7.56
7.24
7.76
7.99
7.17
7.68
7.36
7.24
6.73
6.73
7.24
7.24
6.30
6.61
6.26
6.57

5.12
5.87
5.79
4.80
4.57
5.47
6.54
6.06
5.87
5.98
6.10
5.63
6.14
5.71
5.51
5.16
5.04
5.63
5.51
4.76
4.80
4.65
5.16

4.02
4.72
4.45
3.70
3.43
4.29
5.08
4.72
4.57
4.49
4.53
4.33
4.61
4.29
3.94
3.82
3.54
4.29
4.02
3.43
3.43
3.31
3.94

3.07
3.70
3.46
2.76
2.52
3.27
4.02
3.70
3.54
3.39
3.39
3.27
3.50
3.31
2.91
2.83
2.56
3.27
2.95
2.64
2.48
2.44
2.95

2.09
2.56
2.28
1.81
1.69
2.20
2.68
2.64
2.36
2.20
2.13
2.17
2.17
2.24
1.89
1.77
1.61
2.20
1.85
1.69
1.54
1.54
1.97

1.14
1.46
1.30
1.06
0.94
1.26
1.46
1.57
1.34
1.18
1.26
1.22
1.14
1.34
1.10
0.94
0.94
1.34
0.98
0.98
0.87
0.83
1.14

359

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.99
1.12
0.53
1.29
1.12
1.04
0.46
0.75
0.72
1.00
1.47
0.99
0.54
0.79
0.56
0.89
0.77
1.11
0.79
0.96
1.32
0.86
1.00

440
379
421
481
359
374
354
383
345
294
299
372
370
334
312
328
303
357
282
285
274
265
388

66
63
48
43
55
55
57
42
57
48
30
46
45
37
31
50
32
35
46
48
40
52
43

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
36
34
37
57
49
39
26
51
34
30
44
39
27
54
55
34
58
60
33
51
47
41
49

Roadbed
31
24
27
33
37
28
24
22
26
29
27
28
30
26
31
36
36
26
34
35
39
40
30

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)

8

12

18

24

36

60

8.50
8.11
9.33
8.74
9.49
7.83
8.15
8.74
7.83
9.17
9.33
9.09
8.66
8.82
9.09
8.82
8.78
8.86
9.61
8.90
9.09
9.88
8.39

5.91
5.71
6.81
6.18
6.65
5.94
6.30
6.50
5.79
6.22
5.98
5.87
5.47
5.55
5.67
5.51
5.31
5.51
6.02
5.59
6.02
6.77
6.30

4.65
4.53
5.47
4.88
5.20
4.69
4.92
5.20
4.53
4.92
4.45
4.29
4.09
4.02
4.17
4.02
3.86
3.82
4.29
4.02
4.33
5.31
5.00

3.46
3.54
4.29
3.78
4.02
3.66
3.82
4.06
3.50
3.94
3.15
3.03
3.03
2.95
3.11
2.91
2.76
2.80
3.19
2.95
3.23
4.17
3.86

2.64
2.76
3.39
2.91
3.07
2.83
2.80
3.11
2.60
3.07
2.36
2.28
2.32
2.24
2.32
2.20
2.09
2.09
2.44
2.24
2.44
3.23
2.95

1.73
1.97
2.28
1.97
2.13
1.97
1.81
2.05
1.81
2.20
1.54
1.50
1.54
1.54
1.57
1.50
1.46
1.42
1.65
1.57
1.65
2.28
2.05

1.06
1.22
1.30
1.22
1.34
1.22
0.98
1.14
1.14
1.34
0.94
0.94
0.94
0.98
0.94
0.94
0.91
0.87
1.02
0.94
1.02
1.50
1.26

360

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.30
1.04
0.70
1.46
1.44
1.14
1.55
0.89
1.46
1.26
1.33
1.60
1.62
1.87
1.43
1.60
1.00
1.96
1.84
1.23
1.86
1.89
0.90

392
376
342
383
345
562
565
429
555
254
260
273
244
250
223
244
221
217
208
224
267
303
523

42
58
66
47
40
37
39
57
28
72
41
38
59
48
59
48
50
51
52
56
46
42
33

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
70
74
36
65
74
94
44
37
145
54
72
90
68
100
66
91
97
83
74
80
80
82
90

Roadbed
33
29
27
29
26
29
34
30
30
26
37
37
37
37
38
37
39
40
35
37
35
24
28

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)

8

12

18

24

36

60

9.49
7.44
8.58
8.23
8.74
9.49
8.82
8.90
9.02
8.03
8.23
7.60
7.36
6.61
6.34
6.89
9.33
8.82
8.19
8.58
9.37
8.98
8.31

6.81
5.04
5.31
5.59
6.02
5.87
5.98
5.75
5.63
6.06
6.54
5.75
5.59
5.04
4.53
5.04
7.28
6.65
6.22
6.61
6.81
6.81
6.38

5.31
3.86
3.94
4.17
4.69
4.49
4.80
4.29
4.25
4.88
5.35
4.69
4.53
4.13
3.62
4.06
6.02
5.35
5.04
5.28
5.31
5.59
5.20

4.06
2.91
2.87
3.03
3.62
3.35
3.66
3.11
3.27
3.86
4.33
3.70
3.46
3.23
2.80
3.07
4.72
4.33
3.94
4.09
3.94
4.37
4.09

3.11
2.13
2.13
2.28
2.72
2.52
2.80
2.24
2.48
3.03
3.31
2.76
2.60
2.44
2.09
2.32
3.66
3.46
2.95
2.99
2.91
3.35
3.23

2.09
1.46
1.38
1.46
1.85
1.73
1.81
1.42
1.69
1.97
2.24
1.77
1.73
1.65
1.38
1.57
2.32
2.44
1.81
1.77
1.85
2.13
2.09

1.26
0.91
0.83
0.87
1.14
1.02
1.10
0.79
1.02
1.18
1.26
0.94
0.94
0.94
0.83
0.98
1.18
1.50
0.94
0.87
1.02
1.10
1.18

361

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.08
1.74
1.64
1.32
1.69
1.12
1.96
1.07
1.61
1.59
1.22
1.22
0.88
0.90
1.52
0.95
0.50
1.13
1.15
1.23
0.69
0.67
1.07

361
412
238
332
347
202
337
256
210
578
700
616
611
746
626
662
541
443
591
595
398
487
565

40
45
58
48
47
62
54
56
69
49
46
61
56
55
58
35
57
60
52
43
40
61
54

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
57
100
63
63
67
56
52
46
60
55
43
37
47
64
83
138
23
54
31
27
42
26
38

Roadbed
27
39
42
40
31
34
32
43
34
31
28
37
37
38
44
36
30
24
37
39
34
32
30

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998

8

12

18

24

36

60

8.43
9.21
8.90
7.60
7.28
7.44
7.68
9.09
7.91
6.89
7.36
7.36
7.36
6.73
6.77
7.32
8.31
15.39
17.99
14.13
17.40
12.76
13.66

6.46
6.97
6.34
5.51
5.00
5.31
5.75
6.61
5.87
4.96
5.51
5.16
5.63
4.84
4.96
5.51
5.83
11.18
13.11
10.24
13.46
9.65
9.21

5.35
5.47
4.80
4.29
3.74
4.13
4.57
5.20
4.61
3.82
4.33
4.02
4.45
3.78
3.90
4.45
4.45
8.86
10.24
8.39
10.98
7.99
7.17

4.21
4.17
3.46
3.19
2.80
3.07
3.54
3.90
3.58
2.83
3.31
2.91
3.39
2.87
2.99
3.50
3.35
6.69
7.68
6.61
8.70
6.57
5.51

3.23
3.11
2.56
2.48
2.01
2.20
2.68
2.87
2.68
2.09
2.40
2.09
2.44
2.13
2.28
2.68
2.48
5.04
5.83
5.20
6.81
5.28
4.41

2.13
1.97
1.65
1.65
1.30
1.42
1.73
1.81
1.77
1.22
1.46
1.26
1.46
1.42
1.54
1.81
1.61
3.07
3.58
3.50
4.41
3.62
3.07

1.14
1.14
0.94
1.06
0.79
0.79
1.06
1.02
1.10
0.67
0.75
0.75
0.79
0.83
0.98
1.06
0.98
1.69
1.85
2.05
2.40
2.13
1.97

362

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.68
1.19
0.82
1.33
1.88
1.12
1.55
0.97
1.65
1.55
1.20
1.51
1.25
1.15
1.49
1.05
1.59
1.10
0.89
0.85
0.84
1.09
1.41

558
525
378
541
453
489
665
446
591
559
584
554
733
541
651
608
418
229
169
224
242
273
182

59
27
38
32
45
49
29
37
29
52
53
32
29
54
35
53
39
23
30
40
27
57
30

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
32
58
57
146
89
57
106
47
111
51
37
87
58
74
159
61
76
24
17
29
18
28
56

Roadbed
31
31
37
34
46
44
33
34
32
51
45
47
43
42
36
33
36
21
19
18
15
17
19

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998

8

12

18

24

36

60

12.76
13.11
16.02
16.85
12.99
18.90
17.20
22.95
17.05
24.53
16.77
18.86
19.72
16.93
16.65
14.49
19.02
11.65
13.70
19.25
16.18
17.48
15.39

9.21
8.90
11.34
12.17
9.09
13.90
11.50
15.24
11.10
17.44
11.77
14.02
13.70
12.01
11.14
9.21
11.69
8.19
9.57
13.50
12.28
11.97
11.18

7.36
6.89
9.02
9.72
7.09
10.91
8.82
11.38
8.35
13.19
9.29
11.06
10.39
9.69
8.66
6.81
8.35
6.77
7.20
10.39
10.28
9.13
8.86

5.79
5.20
7.01
7.20
5.47
8.03
6.61
8.23
6.34
9.53
7.44
8.70
7.68
7.64
6.61
5.24
6.18
5.51
5.51
7.44
7.83
6.42
6.69

4.57
4.06
5.47
5.31
4.29
5.91
4.80
6.02
4.72
6.81
5.91
6.73
5.75
6.14
5.12
4.06
4.88
4.45
4.33
5.16
5.79
4.57
5.04

3.27
2.80
3.74
3.31
2.99
3.58
3.03
3.58
3.19
4.41
4.06
4.49
3.70
4.41
3.54
2.87
3.35
3.23
2.87
2.87
3.54
2.52
3.07

2.05
1.73
2.28
1.93
1.89
1.93
1.69
1.97
1.89
2.24
2.32
2.40
1.97
2.56
2.20
1.77
2.05
2.01
1.65
1.54
1.65
1.18
1.69

363

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.86
0.96
1.06
0.96
1.21
0.65
1.32
1.27
1.43
1.95
1.04
1.19
1.12
0.63
1.21
1.43
1.58
0.94
1.49
1.15
0.80
0.51
1.10

255
199
186
234
224
194
144
104
129
111
139
159
125
147
149
134
92
219
178
181
259
149
229

25
27
24
9
24
13
27
20
27
17
51
36
27
44
24
33
25
66
39
10
32
31
23

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
58
54
35
41
60
21
24
17
33
15
24
17
19
27
41
51
40
46
34
22
13
15
24

Roadbed
18
21
16
18
19
18
21
18
19
15
15
15
18
14
17
21
18
19
22
22
21
28
21

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998

8

12

18

24

36

60

17.99
14.13
17.40
12.76
13.66
12.76
13.11
16.02
16.85
12.99
18.90
17.20
22.95
17.05
24.53
16.77
18.86
19.72
16.93
16.65
14.49
19.02
11.65

13.11
10.24
13.46
9.65
9.21
9.21
8.90
11.34
12.17
9.09
13.90
11.50
15.24
11.10
17.44
11.77
14.02
13.70
12.01
11.14
9.21
11.69
8.19

10.24
8.39
10.98
7.99
7.17
7.36
6.89
9.02
9.72
7.09
10.91
8.82
11.38
8.35
13.19
9.29
11.06
10.39
9.69
8.66
6.81
8.35
6.77

7.68
6.61
8.70
6.57
5.51
5.79
5.20
7.01
7.20
5.47
8.03
6.61
8.23
6.34
9.53
7.44
8.70
7.68
7.64
6.61
5.24
6.18
5.51

5.83
5.20
6.81
5.28
4.41
4.57
4.06
5.47
5.31
4.29
5.91
4.80
6.02
4.72
6.81
5.91
6.73
5.75
6.14
5.12
4.06
4.88
4.45

3.58
3.50
4.41
3.62
3.07
3.27
2.80
3.74
3.31
2.99
3.58
3.03
3.58
3.19
4.41
4.06
4.49
3.70
4.41
3.54
2.87
3.35
3.23

1.85
2.05
2.40
2.13
1.97
2.05
1.73
2.28
1.93
1.89
1.93
1.69
1.97
1.89
2.24
2.32
2.40
1.97
2.56
2.20
1.77
2.05
2.01

364

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.89
0.85
0.84
1.09
1.41
0.86
0.96
1.06
0.96
1.21
0.65
1.32
1.27
1.43
1.95
1.04
1.19
1.12
0.63
1.21
1.43
1.58
0.94

169
224
242
273
182
255
199
186
234
224
194
144
104
129
111
139
159
125
147
149
134
92
219

30
40
27
57
30
25
27
24
9
24
13
27
20
27
17
51
36
27
44
24
33
25
66

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
17
29
18
28
56
58
54
35
41
60
21
24
17
33
15
24
17
19
27
41
51
40
46

Roadbed
19
18
15
17
19
18
21
16
18
19
18
21
18
19
15
15
15
18
14
17
21
18
19

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998

8

12

18

24

36

60

13.70
19.25
16.18
17.48
5.94
5.83
5.63
10.24
9.72
10.51
5.83
6.54
10.20
11.18
10.28
5.98
9.06
6.14
6.50
12.99
10.47
10.51
11.77

9.57
13.50
12.28
11.97
5.04
4.88
4.88
8.94
8.54
9.13
5.04
5.75
8.78
9.45
8.70
5.04
7.24
5.16
5.43
10.67
8.58
8.27
8.94

7.20
10.39
10.28
9.13
4.45
4.25
4.29
7.99
7.68
8.19
4.53
5.24
7.83
8.27
7.68
4.29
6.18
4.53
4.76
8.94
7.32
6.73
7.32

5.51
7.44
7.83
6.42
3.74
3.58
3.58
6.73
6.42
6.81
3.94
4.69
6.61
6.93
6.34
3.43
5.20
3.82
3.94
6.93
5.47
5.08
5.51

4.33
5.16
5.79
4.57
2.99
2.80
2.87
5.39
5.16
5.35
3.15
3.94
5.28
5.35
4.96
2.68
4.06
2.99
3.11
5.08
4.06
3.82
4.09

2.87
2.87
3.54
2.52
2.20
1.93
1.97
3.50
3.43
3.50
2.36
2.87
3.58
3.46
3.15
1.77
2.83
2.09
2.17
2.80
2.32
2.40
2.60

1.65
1.54
1.65
1.18
1.38
1.06
0.98
1.54
1.50
1.54
1.42
1.65
1.77
1.54
1.42
1.02
1.69
1.18
1.34
1.06
0.94
1.30
1.38

365

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
1.49
1.15
0.80
0.51
1.20
1.14
0.76
1.17
1.05
1.93
1.41
1.00
0.75
1.06
0.86
1.32
1.41
1.12
1.67
1.88
1.59
0.63
0.59

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

178
181
259
149
1,347
1,357
1,569
1,027
1,130
933
1,672
1,897
944
693
851
1,159
652
1,291
1,207
475
592
434
341

39
10
32
31
6
7
22
5
6
5
6
15
5
37
5
5
8
5
5
9
5
5
12

Subbase
34
22
13
15
500
199
37
14
13
14
370
42
26
12
21
500
108
294
500
11
24
74
32

Roadbed
22
22
21
28
26
34
37
24
25
24
26
22
20
23
25
35
21
30
26
29
34
26
24

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998

8

12

18

24

36

60

8.35
8.19
7.40
8.07
7.32
9.65
8.46
9.37
8.70
10.20
11.10
8.03
9.17
6.81
7.40
7.01
8.62
11.65
9.80
8.46
7.60
6.73
7.36

6.57
6.61
6.18
6.57
6.22
8.03
7.24
7.76
7.48
8.54
8.78
6.18
7.32
5.75
6.18
5.87
7.09
9.13
7.52
6.77
6.30
5.59
5.67

5.55
5.63
5.39
5.67
5.51
7.01
6.46
6.69
6.65
7.40
7.32
5.12
6.14
5.04
5.39
5.12
6.06
7.68
6.14
5.75
5.55
4.76
4.72

4.49
4.41
4.45
4.72
4.72
5.67
5.47
5.43
5.71
6.02
5.87
3.94
4.84
4.21
4.37
4.21
4.88
6.10
4.69
4.65
4.53
3.86
3.74

3.43
3.39
3.54
3.74
3.78
4.29
4.29
4.09
4.45
4.57
4.49
2.83
3.66
3.31
3.46
3.31
3.82
4.65
3.50
3.58
3.58
2.95
2.83

2.24
2.28
2.40
2.48
2.76
2.52
2.80
2.48
3.15
2.64
2.87
1.81
2.36
2.24
2.24
2.24
2.48
2.80
2.17
2.36
2.48
1.89
1.85

1.26
1.34
1.34
1.30
1.65
0.98
1.18
0.98
1.65
0.94
1.46
0.94
1.30
1.18
1.14
1.22
1.30
1.18
1.14
1.38
1.42
0.91
0.98

366

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
1.10
1.30
0.50
0.84
1.10
0.82
0.97
0.93
1.64
0.72
0.78
1.37
1.19
0.89
0.21
0.71
0.42
0.56
0.49
1.41
0.66
0.87
0.83

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

652
687
1,073
722
1,216
870
1,088
733
1,102
836
429
595
632
1,235
1,057
1,104
773
344
455
731
965
989
578

7
5
5
79
5
5
65
49
5
7
43
11
5
6
6
5
8
109
14
5
5
22
49

Subbase
106
252
195
28
291
19
12
13
67
13
22
61
148
113
82
182
52
13
39
228
215
33
41

Roadbed
27
26
28
28
23
36
33
36
23
37
24
37
28
31
32
30
28
29
31
26
26
38
36

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002

8

12

18

24

36

60

6.30
6.34
7.44
7.05
7.76
10.31
8.90
12.56
6.42
6.97
8.70
7.13
8.62
7.05
7.13
6.61
7.48
8.66
19.67
17.94
15.84
16.77
20.60

4.96
5.00
6.30
5.71
6.38
8.07
7.20
9.57
5.08
5.75
6.85
6.14
6.81
5.47
5.43
5.20
5.87
6.77
15.30
14.23
11.97
12.48
15.21

4.09
4.13
5.47
4.76
5.55
6.65
6.14
7.68
4.33
4.88
5.79
5.59
5.87
4.49
4.45
4.33
5.04
5.63
12.31
11.75
9.37
9.45
11.40

3.27
3.23
4.53
3.82
4.45
5.04
4.84
5.67
3.39
3.78
4.53
4.80
4.76
3.62
3.39
3.46
4.06
4.53
9.03
8.83
6.53
6.23
7.57

2.44
2.44
3.62
2.95
3.50
3.82
3.78
4.06
2.48
2.83
3.43
3.90
3.70
2.80
2.56
2.72
3.15
3.50
6.85
6.76
4.87
4.47
5.31

1.61
1.57
2.64
1.93
2.44
2.32
2.44
2.36
1.50
1.77
2.13
2.80
2.48
1.85
1.69
1.85
2.17
2.36
4.18
4.20
2.99
2.55
3.06

0.94
0.94
1.61
1.14
1.42
1.14
1.22
1.10
0.71
0.87
0.94
1.61
1.42
1.06
0.98
1.06
1.22
1.26
2.04
2.12
1.55
1.27
1.48

367

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
1.18
1.20
0.86
1.07
0.66
0.43
0.43
0.94
1.00
0.96
0.80
1.74
1.02
1.17
0.45
0.61
0.85
0.88
1.00
0.47
1.34
1.80
1.93

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

850
850
981
878
848
437
610
320
924
902
488
1,307
671
647
609
706
658
466
256
352
290
253
190

7
7
6
5
6
24
36
19
10
5
100
46
8
24
9
27
31
67
29
25
23
19
18

Subbase
342
342
314
404
209
25
26
20
57
129
20
30
89
66
160
70
51
33
13
15
22
20
16

Roadbed
38
38
23
32
26
29
28
30
48
40
36
23
25
34
36
33
29
28
17
17
23
27
23

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002

8

12

18

24

36

60

16.75
13.26
14.61
12.97
12.93
11.89
10.73
9.24
11.91
14.01
16.86
13.40
12.70
11.98
11.53
11.66
11.85
11.28
10.16
9.24
9.92
11.94
12.47

12.56
9.74
10.51
10.36
10.69
9.84
8.86
7.73
10.37
11.25
12.35
10.20
10.11
9.38
8.54
8.90
8.55
8.27
7.56
6.97
7.35
9.38
10.11

9.71
7.29
7.93
8.69
9.08
8.37
7.50
6.69
9.08
9.50
9.95
8.28
8.31
7.63
6.66
7.13
6.61
6.44
6.03
5.58
5.68
7.70
8.51

6.86
5.02
5.55
6.65
6.90
6.48
5.81
5.33
7.35
7.39
7.32
6.13
6.36
5.71
4.82
5.20
4.62
4.54
4.37
3.99
3.97
5.77
6.68

5.13
3.62
4.15
5.24
5.32
5.01
4.53
4.22
5.72
5.73
5.58
4.71
5.04
4.48
3.71
3.96
3.49
3.42
3.32
3.03
3.02
4.50
5.33

3.33
2.02
2.58
3.32
3.12
2.99
2.78
2.68
3.60
3.53
3.34
2.92
3.35
2.94
2.41
2.52
2.10
2.10
2.10
1.92
1.88
2.94
3.58

1.91
0.97
1.35
1.89
1.38
1.25
1.34
1.34
1.52
1.58
1.73
1.64
1.92
1.64
1.37
1.41
1.10
1.10
1.19
1.10
1.07
1.73
2.10

368

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.91
1.42
1.37
0.71
0.49
0.44
0.33
0.16
0.67
0.33
0.64
0.73
0.55
0.69
0.81
0.49
1.00
0.95
0.43
0.53
1.07
0.45
0.35

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

290
288
235
625
694
683
806
1,141
1,166
431
246
435
512
478
373
463
315
356
488
592
469
573
643

12
37
34
11
26
55
35
33
18
67
38
21
24
29
32
24
42
41
29
22
25
13
16

Subbase
37
22
25
42
14
12
20
24
12
12
17
31
34
33
40
37
29
31
45
60
53
58
43

Roadbed
19
35
26
19
25
28
27
27
24
23
21
22
19
22
27
26
32
32
30
33
34
21
17

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000

8

12

18

24

36

60

13.71
11.61
12.56
15.63
16.00
13.52
13.56
12.85
11.51
12.19
10.34
10.16
11.68
11.10
13.86
10.09
14.11
11.54
11.22
11.46
10.04
8.23
12.52

10.80
9.33
9.74
12.33
12.58
10.84
10.54
9.99
9.36
10.01
8.27
7.99
9.04
8.95
10.14
8.15
12.11
9.79
9.08
9.34
8.03
6.89
10.51

8.91
7.81
7.89
10.08
10.56
9.11
8.58
8.12
7.78
8.36
6.85
6.48
7.26
7.43
7.90
6.79
10.49
8.48
7.70
7.98
6.57
6.02
9.17

6.78
5.98
5.85
7.59
8.23
7.10
6.26
5.84
5.88
6.21
5.04
4.67
5.22
5.51
5.54
5.08
8.32
6.77
6.04
6.24
5.31
5.24
7.68

5.36
4.66
4.54
6.01
6.55
5.58
4.62
4.25
4.45
4.52
3.65
3.38
3.81
4.19
4.20
3.93
6.60
5.36
4.75
4.92
4.09
4.25
6.14

3.59
2.94
2.93
3.99
4.28
3.53
2.82
2.40
2.55
2.59
2.02
1.82
2.05
2.39
2.64
2.41
3.99
3.27
2.95
3.19
2.76
3.03
4.25

2.14
1.58
1.69
2.31
2.30
1.76
1.41
1.10
1.01
1.03
0.81
0.76
0.86
1.00
1.35
1.22
1.68
1.31
1.34
1.57
1.50
1.69
2.28

369

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.44
0.29
0.59
0.67
0.27
0.30
0.78
0.54
0.69
1.24
0.69
0.58
0.64
0.79
1.43
0.63
0.45
0.31
0.31
0.47
1.26
1.05
0.70

486
654
483
396
350
463
427
467
581
639
676
622
465
597
266
725
844
842
548
604
428
750
513

14
23
17
17
43
53
27
28
59
31
39
39
45
53
40
31
24
68
87
63
24
47
14

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
45
29
42
31
18
16
21
18
13
14
17
20
17
15
24
27
10
10
14
18
37
26
25

Roadbed
17
23
21
16
16
20
25
30
33
32
40
43
38
34
26
29
21
28
27
23
24
22
16

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994

8

12

18

24

36

60

14.88
14.17
12.95
17.20
15.39
11.30
16.81
12.32
8.15
13.31
13.35
12.60
11.18
12.01
14.49
13.46
9.69
16.02
17.28
14.06
13.54
9.36
8.99

12.24
11.42
9.76
13.70
13.27
9.57
13.66
9.49
6.81
10.59
9.84
9.69
8.11
10.04
11.57
10.67
8.03
12.24
14.33
11.65
11.26
6.83
6.62

10.55
9.69
7.80
11.30
11.50
8.35
11.46
7.95
5.94
8.70
8.03
7.76
6.30
8.78
9.96
9.13
7.01
10.47
12.13
9.84
9.69
5.60
5.28

8.66
7.76
6.06
8.98
10.00
7.20
9.65
6.30
5.12
6.69
6.26
6.22
4.96
7.32
8.31
7.48
6.06
7.95
9.69
7.72
7.76
4.36
3.96

6.93
6.02
4.53
6.81
8.31
5.94
7.68
4.88
4.25
5.04
4.80
4.92
3.86
5.87
6.50
5.79
4.92
5.98
7.36
5.87
6.02
3.50
3.10

4.61
3.94
2.83
4.41
5.98
4.33
5.12
3.19
3.19
3.31
3.35
3.66
2.87
3.86
4.17
3.74
3.58
3.66
4.69
3.78
4.02
2.24
1.91

2.48
2.05
1.57
2.28
3.27
2.48
2.52
1.57
1.81
1.61
1.93
2.28
1.77
1.89
2.01
1.93
2.01
1.77
2.36
2.05
2.28
1.18
1.05

370

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.44
0.56
1.07
1.03
0.99
0.80
1.13
0.59
0.91
1.70
0.88
1.44
1.62
0.50
1.05
0.92
1.03
0.66
0.95
1.07
0.76
0.64
1.05

388
350
281
255
416
534
264
294
607
294
230
261
234
545
339
363
543
258
328
387
439
289
366

10
13
14
11
32
35
32
36
89
20
25
21
30
16
26
17
55
13
4
5
5
116
40

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
27
24
44
20
10
21
9
16
23
19
36
71
74
15
11
20
20
17
89
279
382
30
39

Roadbed
14
18
23
16
12
15
15
23
21
22
19
16
20
19
18
18
19
19
15
18
16
30
33

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994

8

12

18

24

36

60

9.31
9.38
8.62
9.92
10.57
8.62
10.37
8.63
10.36
11.75
9.31
9.67
9.39
10.60
11.07
10.60
9.83
9.59
10.31
10.02
8.79
9.13
10.06

6.84
6.81
6.35
7.30
7.71
6.31
7.47
6.12
7.81
9.16
6.86
7.35
7.10
7.98
8.27
7.99
7.31
7.03
7.36
7.32
6.41
6.71
7.14

5.59
5.44
5.09
5.81
6.18
5.00
5.98
4.86
6.42
7.62
5.56
5.96
5.86
6.46
6.71
6.64
5.87
5.68
5.75
5.85
5.12
5.35
5.82

4.12
4.07
3.94
4.41
4.64
3.78
4.54
3.69
5.01
6.18
4.28
4.57
4.70
4.96
5.09
5.22
4.51
4.52
4.39
4.47
4.01
4.16
4.46

3.22
3.01
3.13
3.47
3.59
2.97
3.51
2.90
4.01
5.06
3.33
3.70
3.78
3.89
4.02
4.19
3.60
3.58
3.39
3.45
3.14
3.26
3.55

2.05
1.94
2.12
2.26
2.23
1.88
2.23
1.88
2.62
3.54
2.11
2.35
2.62
2.44
2.57
2.78
2.40
2.48
2.14
2.18
2.03
2.12
2.31

1.08
1.04
1.23
1.20
1.18
1.00
1.17
1.05
1.42
2.01
1.09
1.20
1.52
1.25
1.35
1.51
1.35
1.45
1.16
1.14
1.12
1.15
1.23

371

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.65
0.70
0.65
0.94
0.56
0.92
0.47
0.66
0.56
0.70
0.51
1.22
0.52
0.74
0.72
0.34
0.81
0.75
0.97
0.65
0.96
0.83
0.42

346
348
365
292
290
333
265
308
318
302
319
325
358
308
288
302
319
308
257
289
329
317
243

51
33
47
63
50
71
68
66
67
69
83
90
64
65
55
79
49
58
57
64
72
71
99

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
35
41
52
33
29
37
29
45
29
28
30
26
41
25
27
28
39
45
33
30
39
36
31

Roadbed
32
34
29
29
30
35
30
34
25
18
32
29
24
28
26
24
26
25
30
30
32
30
29

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)

8

12

18

24

36

60

9.39
10.85
12.85
8.91
10.26
11.12
10.72
10.01
11.43
10.18
9.82
10.20
9.95
8.65
8.22
9.60
10.73
10.50
10.72
9.80
9.15
9.05
9.13

6.76
8.20
9.74
6.69
7.80
8.47
8.06
7.29
8.70
7.93
7.61
7.62
7.20
6.24
6.07
7.16
7.64
7.80
7.94
7.30
6.52
6.72
6.89

5.47
6.71
8.06
5.48
6.39
6.73
6.53
5.91
7.12
6.54
6.24
5.97
5.84
4.92
4.90
5.72
6.03
6.42
6.69
6.07
5.24
5.43
5.55

4.18
5.32
6.52
4.37
5.01
5.16
5.19
4.54
5.51
5.15
4.84
4.48
4.47
3.70
3.69
4.36
4.48
5.04
5.29
4.74
4.05
3.98
4.14

3.30
4.31
5.37
3.44
3.98
4.07
4.18
3.60
4.40
4.06
3.95
3.45
3.51
2.86
2.88
3.42
3.53
4.02
4.09
3.79
3.10
3.04
3.23

2.16
2.99
3.76
2.33
2.59
2.74
2.88
2.36
2.99
2.68
2.73
2.18
2.28
1.87
1.90
2.27
2.22
2.68
2.43
2.50
2.07
1.89
2.17

1.24
1.72
2.06
1.34
1.31
1.46
1.60
1.23
1.66
1.47
1.64
1.18
1.25
1.01
1.04
1.30
1.15
1.48
1.26
1.46
1.07
1.00
1.29

372

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.65
0.62
0.90
0.71
0.79
1.49
0.88
0.80
0.69
0.54
0.78
1.06
0.35
0.72
0.56
0.68
1.04
0.37
1.71
0.86
0.99
0.48
0.58

314
299
219
385
303
286
276
261
301
405
415
323
285
324
388
351
234
292
334
362
263
386
410

51
54
101
54
97
50
73
97
43
37
19
32
66
58
50
30
70
68
65
37
108
25
9

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
43
36
24
43
24
30
32
29
31
32
64
36
34
42
45
46
29
31
23
42
34
40
122

Roadbed
29
21
17
27
27
24
22
28
21
24
22
29
28
34
34
27
30
24
28
25
32
35
28

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)

8

12

18

24

36

60

8.58
10.69
9.52
9.69
9.81
9.25
9.20
9.65
9.73
9.08
9.55
9.42
10.23
8.50
10.26
11.64
9.19
9.55
9.29
10.47
10.99
10.53
9.75

6.01
7.51
6.79
6.83
7.32
6.88
7.05
7.19
7.36
6.71
7.33
6.69
7.37
6.02
7.74
9.07
6.77
7.26
7.02
7.88
8.21
7.93
7.25

4.59
5.88
5.39
5.34
5.96
5.56
5.78
5.70
5.86
5.33
5.85
5.29
5.91
4.78
6.36
7.54
5.48
5.89
5.80
6.37
6.66
6.59
5.82

3.32
4.35
4.07
3.93
4.43
4.23
4.48
4.20
4.36
3.91
4.42
3.97
4.49
3.63
4.96
6.12
4.22
4.52
4.65
4.90
5.06
5.19
4.47

2.48
3.33
3.15
3.11
3.51
3.34
3.62
3.23
3.34
3.04
3.44
3.08
3.47
2.85
3.97
5.02
3.29
3.66
3.74
3.84
3.99
4.16
3.57

1.51
2.17
2.07
1.99
2.25
2.23
2.51
2.04
2.06
1.93
2.21
1.92
2.20
1.85
2.59
3.51
2.08
2.32
2.59
2.41
2.55
2.76
2.38

0.85
1.14
1.07
1.04
1.13
1.20
1.51
1.02
0.99
1.01
1.10
0.97
1.15
1.03
1.41
1.99
1.08
1.18
1.51
1.23
1.34
1.50
1.34

373

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.97
1.07
1.06
1.41
1.30
0.94
0.54
1.45
1.33
1.11
1.56
0.88
0.47
0.65
0.58
0.74
0.52
1.25
0.51
0.76
0.74
0.36
0.85

326
227
255
241
301
322
415
310
323
334
341
254
263
303
315
296
316
320
353
301
281
298
313

25
56
88
76
78
62
16
56
64
44
63
90
63
63
61
67
77
85
58
62
52
75
44

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
55
33
34
35
28
37
76
30
25
37
28
30
30
45
30
28
30
26
42
25
27
28
40

Roadbed
41
30
32
33
30
29
24
33
34
34
31
35
30
34
25
18
32
29
24
28
26
24
26

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)

8

12

18

24

36

60

9.49
10.25
9.98
8.70
9.08
9.96
9.30
10.77
12.77
8.84
10.20
11.01
10.66
9.95
11.40
10.12
9.74
10.14
9.85
8.58
8.20
9.57
10.65

6.96
7.31
7.30
6.34
6.68
7.07
6.70
8.14
9.68
6.64
7.75
8.39
8.01
7.25
8.68
7.88
7.55
7.58
7.12
6.18
6.06
7.14
7.59

5.62
5.72
5.83
5.08
5.32
5.76
5.42
6.66
8.00
5.45
6.36
6.67
6.50
5.87
7.11
6.50
6.19
5.94
5.78
4.88
4.88
5.70
5.99

4.47
4.36
4.45
3.97
4.14
4.41
4.14
5.27
6.48
4.33
4.98
5.11
5.16
4.51
5.50
5.12
4.80
4.45
4.43
3.68
3.68
4.35
4.45

3.55
3.37
3.44
3.11
3.24
3.51
3.27
4.27
5.33
3.42
3.96
4.03
4.16
3.58
4.39
4.03
3.92
3.43
3.47
2.84
2.88
3.41
3.50

2.45
2.13
2.17
2.00
2.11
2.28
2.14
2.96
3.73
2.32
2.57
2.71
2.86
2.35
2.98
2.66
2.71
2.17
2.26
1.85
1.89
2.26
2.20

1.43
1.15
1.13
1.11
1.14
1.22
1.23
1.71
2.05
1.33
1.30
1.44
1.59
1.22
1.65
1.46
1.63
1.17
1.24
1.00
1.04
1.30
1.14

374

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.77
0.95
0.66
0.96
0.84
0.43
0.63
0.64
0.90
0.66
0.79
1.49
0.89
0.85
0.71
0.55
0.81
1.09
0.35
0.73
0.59
0.70
1.07

305
252
284
329
310
241
310
295
217
380
300
282
273
258
296
396
404
316
282
319
380
344
230

53
55
61
64
69
95
45
49
98
48
93
45
69
94
39
33
16
29
61
53
44
26
66

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
46
33
30
39
36
31
44
37
24
44
24
30
32
29
32
33
71
36
34
43
46
49
29

Roadbed
25
30
30
32
30
29
29
21
17
27
27
24
22
28
21
24
22
29
28
35
33
27
30

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)

8

12

18

24

36

60

10.47
9.59
10.53
9.60
10.48
9.11
8.91
8.99
8.42
10.57
9.44
9.61
9.72
9.18
9.12
9.55
9.65
8.99
9.47
9.79
10.72
9.80
10.60

7.78
7.33
7.80
7.15
7.45
6.49
6.62
6.79
5.90
7.43
6.73
6.79
7.25
6.83
6.98
7.11
7.30
6.64
7.27
7.48
7.94
7.30
7.54

6.40
5.64
6.57
5.94
6.03
5.21
5.36
5.47
4.50
5.82
5.34
5.30
5.90
5.51
5.72
5.64
5.82
5.28
5.80
5.76
6.69
6.07
6.10

5.02
4.42
5.20
4.65
4.69
4.03
3.93
4.08
3.26
4.30
4.04
3.90
4.39
4.20
4.45
4.16
4.33
3.87
4.38
4.51
5.29
4.74
4.75

4.00
3.52
4.02
3.72
3.75
3.09
2.99
3.18
2.43
3.29
3.13
3.09
3.48
3.32
3.58
3.20
3.32
3.00
3.42
3.59
4.09
3.79
3.79

2.67
2.43
2.39
2.45
2.32
2.06
1.86
2.14
1.49
2.15
2.05
1.98
2.23
2.22
2.49
2.02
2.05
1.91
2.20
2.48
2.43
2.50
2.35

1.48
1.39
1.24
1.42
1.27
1.06
0.99
1.27
0.83
1.13
1.06
1.03
1.12
1.19
1.50
1.01
0.98
1.00
1.09
1.42
1.26
1.46
1.29

375

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.37
1.86
1.72
0.80
1.42
1.02
0.47
0.58
0.96
1.04
1.04
1.42
1.30
0.96
0.52
1.43
1.31
1.11
1.58
1.86
1.73
0.85
1.43

288
324
336
357
238
262
387
409
325
228
255
242
301
321
416
310
325
334
340
322
340
362
240

64
31
63
40
91
109
24
9
26
55
88
76
77
63
16
57
63
44
64
34
57
38
82

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
31
50
23
41
30
34
40
122
54
33
34
35
28
37
78
30
25
37
28
48
23
42
29

Roadbed
24
25
28
25
28
32
35
28
42
30
32
33
30
29
24
33
34
34
31
25
28
25
28

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998

8

12

18

24

36

60

9.15
9.05
9.13
8.58
10.69
9.52
9.69
9.81
9.25
9.20
9.65
9.73
9.08
9.55
7.64
8.39
8.62
8.82
7.44
8.78
8.46
8.39
6.46

6.52
6.72
6.89
6.01
7.51
6.79
6.83
7.32
6.88
7.05
7.19
7.36
6.71
7.33
6.14
6.42
6.65
6.77
5.71
6.69
6.61
6.38
5.31

5.24
5.43
5.55
4.59
5.88
5.39
5.34
5.96
5.56
5.78
5.70
5.86
5.33
5.85
5.31
5.55
5.79
5.75
5.04
5.71
5.63
5.55
4.61

4.05
3.98
4.14
3.32
4.35
4.07
3.93
4.43
4.23
4.48
4.20
4.36
3.91
4.42
4.37
4.57
4.72
4.69
4.29
4.61
4.69
4.61
3.94

3.10
3.04
3.23
2.48
3.33
3.15
3.11
3.51
3.34
3.62
3.23
3.34
3.04
3.44
3.46
3.66
3.78
3.74
3.43
3.62
3.62
3.62
3.15

2.07
1.89
2.17
1.51
2.17
2.07
1.99
2.25
2.23
2.51
2.04
2.06
1.93
2.21
2.36
2.40
2.56
2.48
2.32
2.36
2.40
2.36
2.17

1.07
1.00
1.29
0.85
1.14
1.07
1.04
1.13
1.20
1.51
1.02
0.99
1.01
1.10
1.38
1.42
1.50
1.50
1.30
1.26
1.30
1.30
1.22

376

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.97
0.49
1.46
0.96
1.06
1.03
1.39
1.27
0.94
0.54
1.43
1.30
1.10
1.54
0.71
1.72
1.08
1.39
1.64
0.73
1.29
1.63
1.14

264
384
409
326
227
256
242
302
321
412
310
324
333
341
735
530
509
524
482
413
506
459
935

99
27
11
27
55
82
72
72
61
19
54
59
44
59
6
24
27
8
181
72
46
81
20

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
33
40
100
54
33
33
35
28
36
71
29
25
37
28
170
47
44
108
33
30
32
31
54

Roadbed
32
35
28
41
30
32
33
31
29
24
34
34
34
31
27
26
24
24
29
29
28
28
30

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994

8

12

18

24

36

60

7.56
8.94
8.98
8.31
7.91
7.95
8.78
7.80
8.98
17.24
13.09
12.98
11.49
10.56
10.37
11.04
11.48
9.87
11.10
10.38
9.27
9.59
11.81

5.75
6.69
6.69
6.50
6.02
5.94
6.42
5.94
6.69
12.70
9.84
9.82
9.00
8.51
8.36
8.72
8.90
7.51
8.71
7.86
7.33
7.56
9.33

5.04
5.35
5.55
5.35
5.20
5.04
5.28
5.00
5.51
9.70
7.47
7.48
7.13
6.88
6.74
6.83
6.90
5.73
6.75
5.86
5.85
6.10
7.55

4.17
4.25
4.41
4.17
4.17
4.06
4.17
4.06
4.21
6.65
5.04
5.25
5.03
4.98
4.82
4.83
4.72
3.90
4.70
4.08
4.25
4.37
5.45

3.23
3.19
3.43
3.11
3.19
3.15
3.19
3.11
3.23
4.93
3.84
4.05
3.83
3.89
3.74
3.70
3.37
2.84
3.57
3.07
3.23
3.32
4.16

2.17
2.05
2.17
2.05
1.97
2.01
2.05
2.01
2.05
3.09
2.53
2.61
2.41
2.54
2.42
2.43
1.88
1.73
2.37
1.98
2.08
2.17
2.54

1.18
1.14
1.14
1.10
1.06
1.14
1.14
1.14
1.14
1.69
1.46
1.43
1.26
1.43
1.31
1.42
0.95
0.95
1.41
1.15
1.21
1.27
1.35

377

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
1.57
1.33
0.81
1.14
1.60
1.57
1.10
1.40
0.43
0.44
1.08
1.13
1.06
0.92
1.18
0.89
0.64
0.71
1.96
1.07
0.57
0.80
0.59

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

510
385
361
498
628
497
361
554
403
1,019
1,539
1,275
1,917
2,876
2,702
2,527
2,330
2,257
2,566
1,914
3,444
3,282
2,417

89
18
64
9
5
23
38
12
13
33
32
51
59
46
54
32
39
45
28
43
36
33
47

Subbase
34
47
31
71
113
48
40
68
53
22
40
29
26
36
32
46
25
39
48
46
50
50
25

Roadbed
31
31
31
32
34
31
31
31
31
21
24
25
28
25
27
25
36
37
26
31
29
28
26

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994

8

12

18

24

36

60

9.63
9.13
9.29
11.09
9.64
10.59
9.86
11.88
8.65
13.77
9.38
10.55
9.87
9.69
9.25
9.33
8.34
10.29
12.36
9.91
9.81
10.23
9.26

6.88
7.38
7.26
8.91
7.54
8.28
8.10
9.86
6.61
11.03
7.38
8.15
6.75
6.83
6.86
7.27
6.30
7.13
8.86
7.60
7.79
7.78
6.83

5.19
5.81
5.62
6.94
5.81
6.43
6.42
7.95
5.37
9.26
5.83
6.24
5.11
5.13
5.27
5.81
5.03
5.18
6.40
5.95
6.26
6.09
5.22

3.59
4.02
3.98
4.97
4.12
4.55
4.66
5.80
3.81
7.13
4.09
4.40
3.53
3.53
3.69
4.19
3.66
3.46
4.21
4.26
4.68
4.42
3.57

2.63
2.96
3.04
3.73
3.08
3.42
3.55
4.47
2.84
5.59
3.12
3.34
2.66
2.60
2.76
3.23
2.83
2.56
3.11
3.28
3.69
3.41
2.65

1.63
1.83
2.05
2.40
1.98
2.20
2.40
2.98
1.70
3.61
2.00
2.20
1.66
1.61
1.74
2.13
1.88
1.61
1.97
2.11
2.56
2.16
1.66

0.89
1.01
1.18
1.35
1.10
1.25
1.48
1.80
0.94
1.88
1.16
1.29
0.94
0.89
1.02
1.27
1.09
0.91
1.16
1.16
1.57
1.17
0.93

378

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.29
1.15
1.17
1.00
0.91
0.77
1.81
1.53
0.84
0.19
0.96
0.87
0.93
0.44
0.92
0.84
0.36
0.69
1.07
0.73
1.20
0.63
0.49

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,483
3,587
2,521
2,635
2,467
2,424
3,130
3,228
3,444
1,916
3,091
2,210
1,056
1,354
2,273
3,015
2,414
1,187
1,323
1,978
3,107
1,683
1,967

66
31
46
33
48
38
36
19
47
72
35
37
72
65
47
44
73
55
33
69
48
77
56

Subbase
39
47
50
38
41
40
50
50
41
17
50
48
41
40
50
50
49
44
44
36
49
32
44

Roadbed
39
34
30
26
32
28
24
20
37
19
30
27
37
39
35
28
33
39
31
31
23
30
38

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994

8

12

18

24

36

60

8.86
9.85
10.30
9.69
9.79
10.88
10.88
10.10
10.54
11.10
10.28
9.99
11.54
11.25
10.36
10.36
10.79
11.02
10.71
11.48
11.15
9.58
9.87

6.75
7.92
8.09
7.46
7.41
8.01
8.29
7.75
8.01
8.05
8.23
7.58
8.96
8.05
7.84
7.57
7.74
8.10
8.01
8.92
8.34
7.07
7.31

5.44
6.53
6.50
5.82
5.79
5.95
6.35
6.06
6.09
6.25
6.64
5.84
6.94
6.03
6.07
5.83
5.83
6.20
6.18
7.01
6.45
5.55
5.64

3.96
4.89
4.65
4.02
4.07
4.25
4.56
4.30
4.47
4.40
4.85
4.22
5.02
4.24
4.21
4.09
3.89
4.31
4.48
5.15
4.71
3.96
4.02

2.96
3.82
3.52
2.93
3.06
3.32
3.57
3.26
3.54
3.39
3.83
3.17
3.78
3.21
3.13
3.04
2.80
3.19
3.41
3.98
3.64
3.02
3.09

1.84
2.50
2.16
1.78
1.91
2.29
2.47
2.09
2.34
2.15
2.39
2.18
2.34
2.09
1.91
1.96
1.64
2.02
2.20
2.64
2.38
1.96
2.05

1.04
1.42
1.08
0.94
1.06
1.33
1.49
1.20
1.44
1.25
1.28
1.28
1.28
1.19
1.02
1.11
0.92
1.20
1.21
1.46
1.34
1.12
1.18

379

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.81
0.37
0.70
0.67
0.47
1.12
1.12
0.54
1.59
1.02
1.11
1.25
0.84
0.51
0.58
0.19
0.98
0.87
0.51
0.74
0.58
0.38
0.44

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

3,144
3,407
2,240
2,382
2,195
1,259
1,835
2,421
1,890
1,483
2,561
2,157
1,973
1,184
1,911
1,688
1,741
1,954
1,439
1,697
1,374
1,855
1,726

54
53
72
53
55
56
42
43
48
56
70
46
50
57
58
54
42
36
69
61
66
65
61

Subbase
42
37
25
33
38
46
50
43
50
38
28
50
29
39
32
40
38
46
33
30
33
42
45

Roadbed
34
25
32
37
33
27
24
29
25
29
28
28
27
30
34
32
38
30
29
24
26
32
30

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994

8

12

18

24

36

60

10.12
10.37
12.38
11.82
10.85
10.46
11.40
10.47
11.46
11.50
11.51
11.29
11.04
10.02
10.47
11.02
10.14
12.83
13.09
12.98
11.49
10.56
10.37

7.49
7.45
9.66
9.10
8.21
7.79
9.31
8.30
9.11
8.99
9.10
8.69
8.50
7.86
7.71
8.59
7.88
10.32
9.84
9.82
9.00
8.51
8.36

5.74
5.43
7.70
6.99
6.31
5.94
7.58
6.76
7.43
7.23
7.29
6.99
6.78
6.43
5.80
6.81
6.18
8.40
7.47
7.48
7.13
6.88
6.74

4.15
3.47
5.49
4.96
4.36
4.15
5.64
4.97
5.49
5.23
5.32
5.09
4.89
4.71
3.92
4.77
4.33
6.11
5.04
5.25
5.03
4.98
4.82

3.18
2.44
4.07
3.75
3.27
3.12
4.37
3.77
4.18
3.96
3.93
3.83
3.67
3.59
2.88
3.46
3.15
4.51
3.84
4.05
3.83
3.89
3.74

2.15
1.39
2.48
2.49
2.13
2.04
2.72
2.26
2.56
2.34
2.28
2.35
2.18
2.16
1.75
1.88
1.85
2.63
2.53
2.61
2.41
2.54
2.42

1.28
0.73
1.30
1.40
1.22
1.16
1.43
1.11
1.27
1.20
1.12
1.31
1.16
1.09
0.92
0.91
0.93
1.21
1.46
1.43
1.26
1.43
1.31

380

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.59
0.87
0.31
0.90
0.62
0.49
0.68
0.32
0.31
0.65
0.44
0.79
0.74
0.51
0.83
0.69
0.51
0.43
1.08
1.14
1.06
0.92
1.18

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,792
1,588
2,212
1,850
2,088
1,877
3,000
2,606
2,350
2,378
2,621
2,607
2,408
2,735
1,562
2,761
2,531
2,428
1,539
1,272
1,912
2,871
2,696

52
52
48
45
41
52
56
80
74
60
58
47
57
79
63
49
58
58
32
51
59
46
54

Subbase
50
36
25
38
45
45
25
22
21
24
22
32
28
25
34
23
29
16
40
29
26
36
32

Roadbed
28
49
28
26
30
32
26
33
29
30
32
28
32
33
39
38
38
29
24
25
28
25
27

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994

8

12

18

24

36

60

11.04
11.48
9.87
11.10
10.75
10.38
9.83
9.65
9.27
9.59
11.81
9.09
9.63
9.63
9.13
9.29
11.09
9.64
10.59
9.86
11.88
8.65
13.77

8.72
8.90
7.51
8.71
8.44
7.86
7.96
7.70
7.33
7.56
9.33
7.06
7.51
6.88
7.38
7.26
8.91
7.54
8.28
8.10
9.86
6.61
11.03

6.83
6.90
5.73
6.75
6.58
5.86
6.50
6.27
5.85
6.10
7.55
5.74
6.02
5.19
5.81
5.62
6.94
5.81
6.43
6.42
7.95
5.37
9.26

4.83
4.72
3.90
4.70
4.72
4.08
4.81
4.48
4.25
4.37
5.45
4.17
4.37
3.59
4.02
3.98
4.97
4.12
4.55
4.66
5.80
3.81
7.13

3.70
3.37
2.84
3.57
3.56
3.07
3.66
3.42
3.23
3.32
4.16
3.08
3.37
2.63
2.96
3.04
3.73
3.08
3.42
3.55
4.47
2.84
5.59

2.43
1.88
1.73
2.37
2.33
1.98
2.31
2.11
2.08
2.17
2.54
1.87
2.26
1.63
1.83
2.05
2.40
1.98
2.20
2.40
2.98
1.70
3.61

1.42
0.95
0.95
1.41
1.42
1.15
1.28
1.10
1.21
1.27
1.35
0.93
1.43
0.89
1.01
1.18
1.35
1.10
1.25
1.48
1.80
0.94
1.88

381

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.89
0.64
0.71
0.95
0.76
1.07
0.30
0.79
0.52
0.37
0.59
0.28
0.67
0.28
1.15
1.04
1.00
0.92
0.77
0.94
0.93
0.83
0.19

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

2,522
2,324
2,251
2,477
2,914
1,904
3,816
3,067
3,432
3,276
2,413
2,741
3,496
1,480
3,582
2,535
2,630
2,461
2,409
3,808
3,442
3,450
1,912

32
39
45
26
23
43
39
58
37
34
48
80
24
67
31
46
33
49
38
18
15
47
72

Subbase
46
25
39
55
64
46
37
30
50
51
25
27
90
39
46
51
38
41
40
96
68
41
16

Roadbed
25
36
37
25
25
31
28
32
29
28
26
37
25
39
35
30
26
32
28
24
20
37
19

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)

8

12

18

24

36

60

9.38
10.55
9.87
9.59
8.60
8.89
10.18
8.45
8.15
10.72
8.23
12.61
12.53
11.06
10.21
10.04
10.69
11.11
9.56
10.76
10.44
10.09
9.56

7.38
8.15
6.76
6.85
6.86
7.04
7.78
6.62
5.67
7.73
5.62
9.48
9.48
8.67
8.23
8.09
8.44
8.61
7.27
8.45
8.20
7.64
7.75

5.83
6.24
5.12
5.13
5.53
5.64
6.15
5.43
4.25
5.74
4.15
7.20
7.22
6.86
6.65
6.52
6.61
6.68
5.55
6.54
6.39
5.70
6.33

4.09
4.40
3.51
3.50
4.06
4.04
4.51
4.06
2.86
4.08
2.85
4.86
5.06
4.84
4.81
4.67
4.67
4.56
3.78
4.56
4.58
3.97
4.68

3.12
3.34
2.64
2.56
3.16
3.13
3.45
3.18
2.12
3.19
2.10
3.71
3.91
3.69
3.77
3.62
3.58
3.26
2.76
3.46
3.46
2.99
3.56

2.00
2.20
1.64
1.58
2.11
2.04
2.35
2.17
1.28
2.21
1.30
2.44
2.52
2.32
2.46
2.34
2.36
1.82
1.68
2.30
2.26
1.93
2.25

1.16
1.29
0.95
0.88
1.31
1.19
1.45
1.26
0.75
1.35
0.75
1.41
1.38
1.21
1.39
1.27
1.38
0.92
0.92
1.37
1.38
1.12
1.25

382

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.82
0.87
1.11
0.53
0.68
0.76
0.63
0.12
1.70
0.79
1.24
1.10
1.18
1.05
0.93
1.16
0.91
0.64
0.70
0.96
0.76
1.07
0.30

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

3,079
2,206
1,182
1,571
4,124
3,248
2,612
3,029
1,857
1,319
1,413
1,532
1,264
1,906
2,871
2,717
2,517
2,336
2,266
2,477
2,918
1,923
3,859

36
37
66
58
28
41
34
72
62
46
74
32
52
59
46
53
32
39
45
26
23
42
38

Subbase
51
47
43
41
83
50
61
47
55
56
52
39
29
26
36
32
46
26
39
55
65
46
37

Roadbed
30
27
37
39
27
29
25
28
47
26
47
24
25
28
25
27
25
36
37
25
25
31
28

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)

8

12

18

24

36

60

9.41
9.05
9.42
11.59
8.82
9.30
9.34
8.89
9.07
10.88
9.42
10.41
11.70
9.41
8.51
13.54
9.21
10.38
9.72
9.47
8.45
10.79
9.00

7.51
7.16
7.43
9.16
6.85
7.25
6.68
7.18
7.09
8.73
7.37
8.14
9.71
7.50
6.50
10.85
7.25
8.02
6.67
6.76
6.74
7.91
7.13

6.12
5.71
5.99
7.41
5.57
5.81
5.04
5.66
5.49
6.80
5.67
6.32
7.83
5.77
5.28
9.10
5.72
6.14
5.04
5.07
5.44
5.92
5.72

4.36
4.15
4.29
5.34
4.05
4.22
3.48
3.92
3.88
4.88
4.02
4.47
5.72
3.95
3.74
7.01
4.02
4.33
3.46
3.45
3.99
4.22
4.09

3.33
3.15
3.26
4.08
2.99
3.25
2.55
2.88
2.97
3.66
3.01
3.36
4.40
2.93
2.79
5.50
3.06
3.29
2.60
2.53
3.11
3.26
3.17

2.06
2.03
2.13
2.49
1.82
2.19
1.58
1.78
2.00
2.35
1.94
2.16
2.93
1.83
1.68
3.55
1.96
2.17
1.62
1.56
2.08
2.31
2.07

1.07
1.18
1.25
1.32
0.90
1.38
0.87
0.98
1.15
1.33
1.08
1.23
1.77
1.09
0.93
1.85
1.14
1.27
0.93
0.87
1.28
1.47
1.21

383

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.83
0.50
0.35
0.58
0.32
0.65
0.30
1.15
1.04
0.99
0.92
0.78
0.94
1.20
0.83
0.18
0.83
0.87
1.09
0.53
0.66
0.95
0.77

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

3,031
3,426
3,304
2,404
2,706
3,481
1,491
3,576
2,535
2,624
2,458
2,431
3,444
3,261
3,402
1,877
3,066
2,207
1,189
1,554
4,081
1,753
3,254

59
37
33
48
81
24
66
31
46
34
48
38
15
22
48
72
36
37
65
58
29
31
40

Subbase
30
50
52
25
27
88
39
46
51
37
41
41
67
68
41
17
50
47
43
41
81
77
50

Roadbed
32
29
28
26
37
25
39
35
30
26
32
28
20
32
37
19
30
27
37
39
27
24
29

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)

8

12

18

24

36

60

9.97
8.31
8.02
10.70
9.86
8.11
10.58
10.26
8.14
9.60
9.89
9.59
10.23
11.72
9.24
10.34
9.53
9.69
10.71
9.69
25.11
7.92
11.22

7.62
6.51
5.57
7.71
6.78
5.54
8.53
8.17
6.33
7.76
7.65
7.71
7.73
8.82
7.28
7.98
7.24
7.42
8.47
7.29
14.76
5.76
7.89

6.03
5.34
4.18
5.73
5.01
4.09
6.95
6.62
4.97
6.41
6.03
6.13
6.02
6.68
5.72
6.22
5.83
5.75
6.81
5.72
9.35
4.55
5.94

4.42
4.00
2.81
4.07
3.50
2.81
5.24
4.85
3.55
4.79
4.24
4.24
4.23
4.78
4.17
4.39
4.18
4.16
4.86
4.14
5.66
3.08
4.03

3.38
3.13
2.09
3.18
2.64
2.07
4.17
3.75
2.56
3.75
3.22
3.10
3.24
3.71
3.27
3.35
3.02
3.19
3.81
3.15
3.98
2.17
3.09

2.30
2.13
1.26
2.21
1.74
1.28
2.87
2.38
1.53
2.45
2.12
1.85
2.16
2.57
2.28
2.17
1.88
2.09
2.65
2.22
2.49
1.45
2.02

1.42
1.24
0.74
1.35
1.10
0.74
1.71
1.29
0.87
1.40
1.18
0.97
1.36
1.50
1.44
1.25
1.15
1.22
1.71
1.42
1.48
0.88
1.30

384

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.65
0.12
1.71
0.79
1.81
1.30
0.48
0.53
0.72
0.35
0.86
1.02
0.91
0.98
0.75
0.69
1.14
0.73
1.40
0.62
1.60
1.02
1.92

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

2,620
3,046
1,872
1,328
1,422
1,421
2,956
2,717
4,152
3,671
2,332
3,339
2,571
1,432
3,088
2,298
3,843
2,230
3,137
2,721
265
3,267
1,702

34
71
62
46
46
74
46
61
33
50
52
38
27
47
31
42
18
53
18
27
19
30
30

Subbase
61
47
55
56
62
53
44
30
57
39
41
34
75
43
84
43
88
45
100
96
26
100
68

Roadbed
25
28
47
26
33
47
21
28
41
26
30
35
27
24
25
28
31
29
21
25
24
41
28

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)

8

12

18

24

36

60

9.50
10.49
8.75
10.24
10.17
11.48
11.67
10.22
11.18
10.73
9.65
9.62
10.21
10.08
10.17
9.91
7.84
9.29
9.99
9.58
9.37
9.35
9.95

7.87
8.41
7.02
7.87
7.47
9.39
8.09
7.54
8.03
8.28
7.03
7.26
7.40
7.68
8.21
7.90
6.10
7.50
8.06
7.41
7.53
7.07
7.52

6.44
6.81
5.89
6.02
5.64
7.47
5.94
5.85
5.92
6.80
5.51
5.65
5.57
6.15
6.68
6.39
4.79
6.20
6.58
5.84
5.99
5.56
5.85

4.62
5.03
4.33
4.32
4.03
5.40
4.26
4.19
3.95
5.06
3.98
4.02
3.98
4.48
5.04
4.68
3.42
4.64
4.95
4.11
4.14
3.90
4.11

3.84
3.88
3.30
3.32
3.03
4.05
3.26
3.17
2.82
3.98
3.03
3.07
3.11
3.37
4.01
3.62
2.46
3.62
3.91
3.11
3.03
2.90
3.15

2.58
2.47
2.14
2.25
2.17
2.42
2.21
2.13
1.74
2.61
1.95
2.00
2.12
2.20
2.76
2.30
1.47
2.37
2.59
2.06
1.81
1.73
2.10

1.60
1.46
1.28
1.44
1.36
1.25
1.33
1.24
1.05
1.48
1.14
1.13
1.31
1.23
1.65
1.25
0.84
1.36
1.40
1.15
0.95
0.89
1.32

385

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
1.96
0.75
0.47
1.14
0.67
0.93
1.01
0.20
1.20
0.58
0.97
0.44
0.97
0.20
0.49
0.54
0.74
0.33
0.67
0.86
1.01
0.37
0.89

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

4,069
3,613
5,205
2,684
2,037
2,965
957
1,786
1,878
2,152
1,773
1,980
1,561
2,216
2,951
2,725
4,199
3,700
2,386
2,329
3,332
2,021
2,552

27
28
20
24
33
39
53
53
27
68
65
62
50
61
47
60
32
49
83
51
38
73
27

Subbase
74
47
88
89
83
25
47
46
54
32
43
41
58
36
44
31
58
39
28
41
34
29
75

Roadbed
23
25
28
25
27
28
27
29
34
24
31
32
28
29
21
28
41
26
25
30
35
38
27

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)

8

12

18

24

36

60

11.63
11.46
9.04
10.12
9.49
9.50
10.16
8.49
9.77
9.49
11.17
11.33
10.16
9.97
10.32
10.84
10.40
11.05
11.76
9.47
9.35
9.85
9.78

8.06
8.63
7.12
7.81
7.27
7.14
8.15
6.81
7.17
7.58
9.14
7.85
7.79
7.36
7.39
7.79
8.03
8.74
8.85
6.90
7.06
7.14
7.45

5.67
6.53
5.60
6.09
5.63
5.61
6.60
5.71
5.42
6.06
7.27
5.76
6.02
5.71
5.63
5.74
6.59
6.92
6.84
5.41
5.49
5.37
5.97

3.99
4.67
4.08
4.30
4.08
4.06
4.88
4.20
3.87
4.42
5.26
4.13
4.11
4.09
3.76
3.83
4.91
5.11
4.98
3.90
3.91
3.84
4.35

3.11
3.63
3.21
3.27
3.13
3.09
3.75
3.20
2.91
3.33
3.94
3.16
3.02
3.10
2.70
2.74
3.86
3.94
3.86
2.98
2.98
3.00
3.27

2.20
2.51
2.24
2.13
2.04
2.18
2.39
2.07
2.09
2.07
2.36
2.14
1.77
2.08
1.56
1.69
2.53
2.63
2.54
1.91
1.95
2.04
2.13

1.28
1.47
1.41
1.22
1.19
1.39
1.41
1.24
1.31
1.04
1.22
1.29
0.89
1.21
0.82
1.02
1.44
1.46
1.40
1.12
1.10
1.26
1.19

386

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
1.39
0.97
0.77
0.68
0.70
0.64
0.73
0.50
0.67
0.75
0.91
1.00
0.92
0.20
0.57
1.20
0.56
0.77
0.71
0.99
0.42
0.97
0.20

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

815
1,439
3,077
2,288
2,235
2,732
3,597
5,221
2,037
2,543
2,977
964
1,931
1,786
1,543
1,872
2,149
2,030
1,227
1,783
1,986
1,565
2,221

49
47
32
43
53
27
28
20
33
75
39
53
60
53
56
28
68
57
66
64
62
50
61

Subbase
51
43
83
43
45
97
47
88
84
26
25
47
27
46
31
54
32
31
30
43
41
59
36

Roadbed
27
24
25
28
29
25
25
28
27
32
28
27
37
29
41
34
24
24
25
31
32
28
29

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-M28-CS75061-05-21-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-US2-CS75021-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008

8

12

18

24

36

60

9.71
9.41
9.27
11.12
10.20
9.44
9.89
9.85
10.01
8.91
11.07
5.55
5.20
6.30
6.15
5.87
5.62
6.07
6.24
6.08
6.11
10.82
10.50

8.07
7.84
7.64
9.41
8.76
7.94
8.44
8.24
8.81
7.45
9.63
4.69
4.34
5.40
5.29
5.01
4.83
5.29
5.42
5.33
5.36
9.32
8.91

7.09
6.94
6.68
8.30
7.75
7.11
7.47
7.35
7.99
6.53
8.59
4.28
3.90
5.00
4.88
4.60
4.46
4.88
5.03
4.95
4.97
8.19
7.81

5.71
5.63
5.39
6.74
6.42
5.90
6.11
6.00
6.79
5.28
7.21
3.72
3.34
4.38
4.27
4.00
3.84
4.28
4.36
4.37
4.42
6.58
6.29

4.61
4.63
4.37
5.50
5.33
4.83
4.97
4.95
5.80
4.21
6.02
3.19
2.85
3.82
3.71
3.43
3.25
3.72
3.75
3.84
3.87
5.19
5.01

3.06
3.13
2.89
3.66
3.64
3.25
3.26
3.38
4.13
2.63
4.24
2.35
2.04
2.87
2.78
2.46
2.29
2.81
2.75
2.88
2.96
3.15
3.16

1.67
1.77
1.50
1.93
1.99
1.67
1.60
1.90
2.32
1.19
2.41
1.31
1.12
1.77
1.68
1.31
1.16
1.65
1.55
1.73
1.82
1.38
1.43

387

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.47
0.63
0.37
0.30
0.31
0.60
0.25
0.62
0.33
0.43
0.20
0.78
0.78
1.04
0.92
1.02
0.91
0.55
0.79
0.86
0.71
0.22
0.09

700
700
700
700
700
700
700
700
700
700
700
300
300
300
300
300
300
300
300
300
300
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,278
1,342
1,058
1,198
1,408
1,315
1,433
1,282
1,841
1,369
1,502
1,761
1,774
2,085
2,224
2,237
2,975
2,368
2,722
2,890
2,714
2,012
1,377

39
44
79
43
51
83
55
52
60
70
36
224
209
163
159
182
142
180
131
158
170
22
97

Subbase
28
31
21
19
21
17
16
26
19
15
23
15
21
26
26
12
13
18
19
21
23
13
12

Roadbed
22
21
25
20
19
23
24
20
17
32
16
28
31
18
19
29
33
21
22
19
18
26
26

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-Su-M28-CS17061-05-22-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008

8

12

18

24

36

60

10.30
10.05
9.73
10.65
10.51
9.43
9.23
10.43
10.18
13.12
9.13
9.36
8.84
10.60
11.74
10.85
11.31
11.33
11.65
10.88
12.13
13.68
15.08

8.76
8.48
8.13
9.21
9.10
7.99
7.88
8.97
7.35
9.84
6.78
6.93
6.32
7.54
9.26
8.31
8.52
8.45
9.83
8.62
9.38
10.57
11.85

7.74
7.52
7.19
8.26
8.15
7.08
7.03
7.96
6.13
7.98
5.64
5.76
5.19
5.92
7.71
6.86
7.06
7.16
8.51
7.26
7.74
8.54
9.65

6.35
6.17
5.77
6.87
6.85
5.80
5.84
6.56
4.87
6.10
4.52
4.53
4.10
4.26
5.94
5.06
5.45
5.66
7.06
5.88
5.96
6.52
7.26

5.11
5.05
4.67
5.66
5.68
4.70
4.83
5.38
3.96
4.83
3.75
3.65
3.30
3.19
4.69
3.85
4.24
4.58
5.78
4.75
4.65
5.08
5.54

3.30
3.42
3.05
3.88
3.92
3.10
3.26
3.61
2.80
3.23
2.73
2.51
2.35
1.88
3.11
2.48
2.76
3.14
4.08
3.27
2.98
3.25
3.41

1.64
1.85
1.56
2.13
2.14
1.57
1.71
1.82
1.62
1.82
1.70
1.48
1.42
0.93
1.71
1.46
1.57
1.82
2.38
1.81
1.59
1.79
1.73

388

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.51
0.44
0.48
0.36
0.41
0.41
0.47
0.14
1.37
1.46
1.49
1.90
1.91
1.78
0.41
0.27
0.67
0.55
0.41
0.39
0.29
0.70
0.59

700
700
700
700
700
700
700
700
200
200
200
200
200
200
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,733
1,445
1,413
1,990
1,870
1,618
1,641
1,478
732
1,097
1,180
1,323
1,036
1,041
443
523
403
327
717
420
386
340
339

61
85
87
35
66
96
126
107
96
41
81
73
83
57
34
9
36
71
25
77
42
26
23

Subbase
17
23
20
25
21
19
19
15
54
43
79
62
77
37
28
105
33
32
32
26
24
25
18

Roadbed
22
20
23
17
18
24
22
21
15
13
14
16
17
25
21
25
23
20
15
20
22
19
20

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS71073-06-04-2008-(2)
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-N-US23-CS4032-06-03-2008
flex-Su-I75-CS49025-05-22-2008
flex-Su-I75-CS49025-05-22-2008
flex-Su-I75-CS49025-05-22-2008
flex-Su-I75-CS49025-05-22-2008
flex-B-M57-CS29022-08-30-1994

8

12

18

24

36

60

12.18
7.18
7.38
5.71
6.08
5.64
5.72
6.60
7.13
8.75
9.31
6.71
8.27
7.70
7.36
7.42
8.91
12.32
6.45
5.96
5.94
6.39
19.95

9.61
5.78
6.03
4.70
4.91
4.62
4.61
5.43
5.72
7.36
7.87
5.65
7.20
6.10
6.29
6.39
6.19
9.36
4.78
4.42
4.52
4.81
14.23

8.25
5.10
5.35
4.30
4.35
4.13
4.13
4.80
5.00
6.47
7.16
5.13
6.64
5.43
5.78
5.83
4.83
7.73
3.94
3.69
3.74
4.07
10.17

6.59
4.22
4.55
3.77
3.69
3.49
3.45
3.99
4.03
5.26
6.21
4.56
5.88
4.63
5.05
5.09
3.36
6.01
2.91
2.72
2.82
3.07
6.24

5.31
3.50
3.85
3.26
3.12
2.98
2.86
3.32
3.23
4.19
5.34
3.95
5.11
3.96
4.35
4.39
2.44
4.78
2.09
1.95
2.03
2.28
4.18

3.63
2.47
2.80
2.52
2.30
2.19
2.04
2.33
2.13
2.61
4.00
2.98
3.81
2.93
3.23
3.14
1.37
3.12
0.99
0.95
1.07
1.22
2.21

2.05
1.41
1.63
1.54
1.31
1.26
1.15
1.18
1.08
1.06
2.40
1.80
2.14
1.68
1.86
1.56
0.62
1.54
0.21
0.24
0.38
0.44
1.13

389

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.27
0.39
0.70
0.70
0.40
0.47
0.95
0.19
0.77
0.39
0.97
1.11
0.79
0.86
0.94
0.57
1.82
0.92
0.67
0.82
0.80
1.27
1.81

700
700
300
300
300
300
300
300
300
300
150
150
150
150
150
150
150
150
150
150
150
150
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

429
740
946
982
921
1,153
1,294
1,071
1,165
1,409
1,346
1,230
1,374
641
1,596
1,187
652
516
611
717
838
785
208

50
150
158
341
229
238
177
193
100
72
113
283
286
212
220
387
37
49
62
51
17
21
15

Subbase
25
36
38
48
42
44
46
22
30
12
53
66
31
65
48
20
58
37
19
26
117
72
19

Roadbed
18
26
19
20
24
25
27
28
28
29
7
10
9
11
10
14
29
12
68
64
45
39
29

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994

8

12

18

24

36

60

16.78
13.63
19.29
20.53
14.95
12.44
17.00
19.76
18.16
21.87
16.91
18.57
17.71
16.08
19.79
17.66
19.92
17.87
16.50
17.65
18.88
16.80
13.71

11.52
9.51
13.78
15.36
10.61
8.86
12.00
14.50
13.22
15.14
12.08
12.95
12.58
11.41
14.37
12.90
14.70
12.99
11.40
12.08
12.62
11.54
9.69

8.33
7.10
9.96
11.74
7.81
6.71
8.80
11.03
9.71
10.80
9.06
9.54
9.33
8.43
10.89
9.88
11.30
9.73
8.33
8.88
9.05
8.20
7.26

5.29
4.72
6.49
8.14
5.13
4.56
5.92
7.62
6.47
6.77
6.11
6.28
6.17
5.69
7.65
7.11
7.72
6.47
5.67
5.89
5.80
5.18
4.90

3.75
3.42
4.62
6.04
3.73
3.37
4.38
5.63
4.85
4.58
4.43
4.49
4.46
4.17
5.71
5.46
5.69
4.67
4.16
4.21
4.06
3.64
3.58

2.15
2.07
2.69
3.57
2.22
2.05
2.77
3.37
3.04
2.57
2.52
2.64
2.62
2.50
3.55
3.55
3.28
2.75
2.46
2.49
2.35
2.06
2.17

1.18
1.15
1.36
1.76
1.25
1.16
1.53
1.74
1.67
1.30
1.24
1.43
1.37
1.34
1.92
1.93
1.70
1.48
1.29
1.29
1.30
1.10
1.27

390

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.24
0.69
1.92
1.47
1.25
0.81
1.30
1.13
1.86
1.62
1.16
0.91
1.28
1.18
0.96
1.11
1.02
1.15
1.22
0.93
0.83
1.48
0.98

228
305
195
219
296
363
229
222
230
166
229
214
225
244
214
223
245
262
200
195
186
214
344

20
25
22
26
19
27
22
24
19
17
31
19
23
26
23
32
20
17
32
27
18
21
19

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
27
34
19
14
34
38
29
17
26
18
18
23
21
25
20
22
17
23
22
22
25
25
42

Roadbed
29
31
25
19
28
31
23
20
21
25
27
24
25
26
18
19
20
23
27
26
26
31
28

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)

8

12

18

24

36

60

19.14
13.88
19.78
16.68
14.59
14.95
16.20
15.76
18.95
11.91
12.36
12.20
12.23
11.37
13.61
10.44
11.53
11.42
12.51
11.87
10.94
10.57
11.46

13.91
10.09
13.95
11.93
10.25
10.78
12.62
12.03
13.91
8.40
9.12
8.60
8.90
8.14
9.88
7.59
8.14
8.39
8.55
8.58
7.85
7.57
8.45

10.60
7.72
10.10
8.73
7.48
8.14
10.28
9.62
10.63
6.18
7.11
6.37
6.80
6.02
7.51
5.75
6.03
6.44
6.35
6.29
5.76
5.70
6.54

7.27
5.51
6.46
5.90
4.91
5.64
8.03
7.20
7.44
4.27
5.19
4.17
4.82
4.07
5.41
3.95
3.97
4.49
4.16
4.21
3.85
3.93
4.64

5.41
4.20
4.45
4.37
3.53
4.27
6.52
5.75
5.46
3.18
3.89
3.02
3.59
2.95
4.17
2.91
2.81
3.25
2.93
3.03
2.84
2.96
3.48

3.31
2.64
2.45
2.76
2.08
2.72
4.58
3.94
3.10
2.05
2.53
1.75
2.28
1.83
2.77
1.82
1.63
1.97
1.70
1.89
1.81
1.86
2.16

1.73
1.42
1.32
1.59
1.17
1.42
2.68
2.38
1.60
1.23
1.47
0.90
1.21
1.01
1.51
1.04
0.88
1.04
0.95
1.09
1.08
1.06
1.15

391

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.19
0.99
1.13
1.27
1.12
1.58
0.68
0.67
0.96
1.05
0.53
1.37
1.04
1.05
1.40
0.77
0.82
0.72
0.64
1.12
1.20
0.94
0.76

222
288
217
261
287
249
325
360
251
360
429
313
346
382
281
476
372
424
328
382
408
392
391

25
41
14
17
21
37
41
23
24
23
27
36
41
29
42
25
29
34
25
18
19
33
40

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
19
27
21
35
33
25
26
35
17
56
41
30
31
42
31
52
36
32
37
51
65
45
30

Roadbed
20
25
26
23
30
25
14
15
21
30
25
38
29
35
24
34
40
33
37
31
32
33
29

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)

8

12

18

24

36

60

9.39
11.44
10.38
12.57
12.50
12.34
21.48
19.81
19.90
19.31
15.43
17.30
19.87
22.28
17.86
15.45
21.82
17.48
19.21
15.44
12.50
11.49
11.02

6.88
8.47
7.42
9.77
9.39
8.31
15.35
14.52
13.38
13.74
11.08
12.13
12.61
14.58
12.29
10.68
13.96
11.19
13.37
10.27
9.03
8.25
7.89

5.14
6.38
5.60
7.73
7.12
5.96
11.30
11.02
9.54
10.13
8.11
9.00
8.63
10.31
8.86
7.67
9.80
8.02
9.55
7.30
6.62
6.05
5.94

3.40
4.35
3.92
5.61
5.06
4.00
7.54
7.81
5.95
6.43
5.46
5.84
5.27
6.24
5.71
5.24
6.11
5.33
6.45
4.81
4.44
4.04
4.10

2.46
3.22
2.92
4.28
3.89
2.98
5.46
5.82
4.15
4.53
4.08
4.15
3.64
4.31
4.11
3.82
4.27
3.93
4.76
3.43
3.19
2.98
3.08

1.45
1.99
1.97
2.84
2.58
1.98
3.21
3.67
2.46
2.64
2.65
2.42
2.21
2.49
2.44
2.37
2.65
2.65
2.92
2.09
1.99
1.90
1.94

0.86
1.08
1.20
1.56
1.62
1.20
1.74
2.00
1.32
1.46
1.59
1.39
1.25
1.33
1.31
1.29
1.51
1.57
1.62
1.16
1.15
1.13
1.11

392

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.31
1.40
0.54
1.25
1.26
0.98
1.20
0.98
1.34
1.29
1.28
0.89
0.93
1.36
1.39
1.30
0.59
0.38
1.57
0.90
1.10
1.20
0.95

572
398
447
451
449
283
191
216
164
223
284
258
144
137
192
213
138
168
177
203
385
406
392

16
29
21
28
13
22
16
21
17
13
14
13
15
15
21
28
14
19
20
24
18
19
33

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
80
36
79
32
85
62
19
20
23
25
49
31
29
20
24
28
27
40
24
31
51
65
45

Roadbed
40
31
29
22
22
29
19
17
25
23
22
24
27
25
25
26
22
22
21
29
31
32
32

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(4)

8

12

18

24

36

60

12.00
9.81
11.99
10.84
13.17
13.04
12.95
22.28
20.51
20.66
19.94
15.94
17.83
17.22
20.41
22.72
18.17
15.81
22.22
17.98
19.76
15.84
19.19

8.85
7.18
8.88
7.75
10.23
9.80
8.72
15.92
15.03
13.89
14.19
11.45
12.50
12.24
12.96
14.87
12.50
10.92
14.21
11.52
13.76
10.53
13.69

6.85
5.37
6.69
5.85
8.09
7.43
6.25
11.72
11.41
9.90
10.46
8.38
9.28
9.23
8.86
10.52
9.01
7.85
9.98
8.25
9.82
7.49
9.78

4.86
3.55
4.56
4.09
5.88
5.28
4.20
7.82
8.08
6.18
6.64
5.64
6.02
6.51
5.42
6.36
5.81
5.36
6.22
5.48
6.63
4.93
6.01

3.64
2.57
3.37
3.06
4.48
4.06
3.13
5.66
6.03
4.31
4.68
4.22
4.27
4.98
3.74
4.40
4.18
3.90
4.35
4.05
4.90
3.52
4.02

2.26
1.51
2.09
2.05
2.98
2.69
2.08
3.33
3.80
2.55
2.73
2.74
2.50
3.32
2.27
2.54
2.49
2.42
2.70
2.72
3.00
2.14
2.13

1.21
0.90
1.13
1.25
1.63
1.69
1.26
1.81
2.07
1.37
1.51
1.64
1.43
1.84
1.28
1.36
1.34
1.32
1.54
1.61
1.66
1.19
1.09

393

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.75
1.31
1.43
0.57
1.26
1.28
0.99
1.21
0.97
1.33
1.27
1.29
0.88
1.18
0.95
1.37
1.38
1.28
0.59
0.38
1.58
0.91
1.78

392
571
397
446
450
447
283
190
216
165
224
283
258
213
144
137
191
214
138
167
176
203
208

40
16
29
21
29
13
22
16
21
17
12
14
13
28
16
15
21
27
14
19
20
24
15

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
30
81
36
77
31
84
62
19
20
23
25
49
31
27
29
20
24
28
27
40
23
31
19

Roadbed
29
40
31
29
22
22
29
19
17
25
23
22
25
19
27
25
25
26
22
22
21
29
29

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)

8

12

18

24

36

60

16.12
13.07
18.50
14.26
11.95
16.31
19.18
17.53
21.17
16.29
17.98
17.02
15.51
19.13
16.99
19.34
17.29
16.00
17.11
18.33
16.21
13.14
18.42

11.07
9.12
13.21
10.13
8.51
11.52
14.07
12.76
14.66
11.63
12.55
12.08
11.01
13.89
12.41
14.28
12.57
11.05
11.71
12.25
11.13
9.28
13.38

8.00
6.80
9.55
7.45
6.44
8.45
10.71
9.37
10.45
8.73
9.24
8.97
8.14
10.53
9.51
10.97
9.41
8.07
8.61
8.79
7.91
6.95
10.20

5.08
4.53
6.22
4.89
4.38
5.69
7.40
6.25
6.55
5.89
6.08
5.92
5.49
7.40
6.84
7.50
6.26
5.50
5.71
5.63
5.00
4.69
7.00

3.60
3.27
4.43
3.56
3.24
4.21
5.47
4.68
4.43
4.27
4.35
4.28
4.03
5.52
5.26
5.52
4.52
4.04
4.08
3.94
3.51
3.43
5.21

2.06
1.98
2.58
2.12
1.97
2.66
3.27
2.93
2.48
2.43
2.55
2.52
2.42
3.43
3.41
3.19
2.66
2.38
2.41
2.28
1.99
2.08
3.18

1.13
1.10
1.30
1.19
1.11
1.47
1.69
1.61
1.26
1.20
1.39
1.31
1.30
1.85
1.86
1.65
1.43
1.25
1.25
1.26
1.06
1.22
1.67

394

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.24
0.68
1.93
1.25
0.82
1.32
1.12
1.87
1.60
1.18
0.90
1.28
1.18
0.95
1.11
1.04
1.16
1.20
0.93
0.83
1.48
0.99
1.18

228
304
195
295
361
228
222
230
166
228
214
225
244
214
224
244
261
201
195
186
212
346
223

20
25
22
19
27
22
24
19
16
32
19
23
26
23
32
20
17
32
27
18
21
19
24

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
27
34
19
34
38
29
17
26
18
18
23
21
25
20
22
17
23
23
22
25
25
43
19

Roadbed
29
31
25
28
31
23
20
21
25
27
24
25
26
18
19
20
23
27
26
27
31
28
20

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993

8

12

18

24

36

60

13.35
19.19
15.90
14.04
14.45
15.74
15.30
18.38
11.90
11.76
11.72
10.89
13.09
10.06
11.07
11.03
12.08
11.02
12.00
11.99
11.99
13.17
22.28

9.71
13.53
11.37
9.86
10.42
12.26
11.67
13.49
8.78
8.29
8.54
7.80
9.50
7.32
7.82
8.11
8.26
7.89
8.85
8.58
8.88
10.23
15.92

7.42
9.80
8.33
7.20
7.87
9.98
9.34
10.31
6.85
6.14
6.52
5.77
7.22
5.54
5.79
6.23
6.13
5.94
6.85
6.30
6.69
8.09
11.72

5.30
6.27
5.62
4.72
5.45
7.80
6.99
7.21
5.00
4.02
4.62
3.90
5.20
3.80
3.81
4.34
4.01
4.10
4.86
4.06
4.56
5.88
7.82

4.04
4.31
4.16
3.39
4.13
6.33
5.58
5.29
3.75
2.91
3.44
2.83
4.01
2.80
2.70
3.14
2.83
3.08
3.64
2.90
3.37
4.48
5.66

2.54
2.37
2.64
2.00
2.63
4.45
3.82
3.01
2.44
1.69
2.19
1.75
2.67
1.75
1.57
1.90
1.64
1.94
2.26
1.68
2.09
2.98
3.33

1.37
1.28
1.52
1.12
1.37
2.61
2.31
1.55
1.42
0.87
1.16
0.97
1.45
1.01
0.85
1.01
0.92
1.11
1.21
0.87
1.13
1.63
1.81

395

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.00
1.12
1.25
1.13
1.61
0.68
0.66
0.96
0.54
1.34
1.06
1.05
1.42
0.78
0.82
0.69
0.66
0.95
0.75
1.66
1.43
1.26
1.21

288
218
261
288
249
324
361
251
428
316
346
381
279
478
372
426
331
392
392
344
397
450
190

41
14
17
20
37
41
23
24
27
35
41
29
42
25
29
34
25
33
40
31
29
29
16

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
27
21
35
34
25
26
35
17
41
30
31
42
30
53
37
32
38
45
30
32
36
31
19

Roadbed
25
26
23
30
25
14
15
21
25
38
29
35
24
34
39
33
37
32
29
40
31
22
19

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993

8

12

18

24

36

60

20.51
18.02
20.66
16.85
20.97
17.22
22.72
18.17
21.62
22.87
21.47
17.24
15.81
19.76
15.84
18.87
14.90
16.78
13.63
19.29
20.53
14.95
12.44

15.03
12.68
13.89
11.58
15.21
12.24
14.87
12.50
14.95
15.70
14.59
11.44
10.92
13.76
10.53
12.77
11.13
11.52
9.51
13.78
15.36
10.61
8.86

11.41
9.42
9.90
8.62
11.38
9.23
10.52
9.01
10.87
11.66
10.38
8.13
7.85
9.82
7.49
9.07
8.48
8.33
7.10
9.96
11.74
7.81
6.71

8.08
6.31
6.18
5.96
7.83
6.51
6.36
5.81
7.24
7.82
7.01
5.39
5.36
6.63
4.93
5.86
5.84
5.29
4.72
6.49
8.14
5.13
4.56

6.03
4.60
4.31
4.42
5.72
4.98
4.40
4.18
5.29
5.76
5.12
3.88
3.90
4.90
3.52
4.13
4.16
3.75
3.42
4.62
6.04
3.73
3.37

3.80
2.70
2.55
2.77
3.46
3.32
2.54
2.49
3.24
3.51
3.13
2.38
2.42
3.00
2.14
2.39
2.37
2.15
2.07
2.69
3.57
2.22
2.05

2.07
1.43
1.37
1.44
1.78
1.84
1.36
1.34
1.67
1.85
1.67
1.28
1.32
1.66
1.19
1.23
1.11
1.18
1.15
1.36
1.76
1.25
1.16

396

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.97
1.06
1.33
1.23
1.32
1.18
1.37
1.38
1.66
1.12
1.50
1.17
1.28
1.58
0.91
1.49
1.39
1.24
0.69
1.92
1.47
1.25
0.81

216
215
165
180
190
213
137
191
149
144
139
169
214
176
203
165
310
228
305
195
219
296
363

21
25
17
36
23
28
15
21
23
22
23
27
27
20
24
24
36
20
25
22
26
19
27

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
20
21
23
22
16
27
20
24
18
17
19
26
28
23
31
20
18
27
34
19
14
34
38

Roadbed
17
24
25
24
19
19
25
25
20
19
20
27
26
21
29
27
30
29
31
25
19
28
31

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993

8

12

18

24

36

60

17.00
19.76
18.16
21.87
16.91
18.57
17.71
16.08
19.79
17.66
19.92
17.87
16.50
17.65
18.88
16.80
13.71
19.14
13.88
19.78
16.68
14.59
14.95

12.00
14.50
13.22
15.14
12.08
12.95
12.58
11.41
14.37
12.90
14.70
12.99
11.40
12.08
12.62
11.54
9.69
13.91
10.09
13.95
11.93
10.25
10.78

8.80
11.03
9.71
10.80
9.06
9.54
9.33
8.43
10.89
9.88
11.30
9.73
8.33
8.88
9.05
8.20
7.26
10.60
7.72
10.10
8.73
7.48
8.14

5.92
7.62
6.47
6.77
6.11
6.28
6.17
5.69
7.65
7.11
7.72
6.47
5.67
5.89
5.80
5.18
4.90
7.27
5.51
6.46
5.90
4.91
5.64

4.38
5.63
4.85
4.58
4.43
4.49
4.46
4.17
5.71
5.46
5.69
4.67
4.16
4.21
4.06
3.64
3.58
5.41
4.20
4.45
4.37
3.53
4.27

2.77
3.37
3.04
2.57
2.52
2.64
2.62
2.50
3.55
3.55
3.28
2.75
2.46
2.49
2.35
2.06
2.17
3.31
2.64
2.45
2.76
2.08
2.72

1.53
1.74
1.67
1.30
1.24
1.43
1.37
1.34
1.92
1.93
1.70
1.48
1.29
1.29
1.30
1.10
1.27
1.73
1.42
1.32
1.59
1.17
1.42

397

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.30
1.13
1.86
1.62
1.16
0.91
1.28
1.18
0.96
1.11
1.02
1.15
1.22
0.93
0.83
1.48
0.98
1.19
0.99
1.13
1.27
1.12
1.58

229
222
230
166
229
214
225
244
214
223
245
262
200
195
186
214
344
222
288
217
261
287
249

22
24
19
17
31
19
23
26
23
32
20
17
32
27
18
21
19
25
41
14
17
21
37

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
29
17
26
18
18
23
21
25
20
22
17
23
22
22
25
25
42
19
27
21
35
33
25

Roadbed
23
20
21
25
27
24
25
26
18
19
20
23
27
26
26
31
28
20
25
26
23
30
25

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005

8

12

18

24

36

60

16.20
15.76
18.95
11.91
12.36
12.20
12.23
11.37
13.61
10.44
11.53
11.42
12.51
12.72
12.02
11.74
13.15
11.89
16.31
15.93
13.19
13.66
14.74

12.62
12.03
13.91
8.40
9.12
8.60
8.90
8.14
9.88
7.59
8.14
8.39
8.55
10.05
9.52
9.06
9.95
8.91
12.57
13.00
9.83
10.35
11.60

10.28
9.62
10.63
6.18
7.11
6.37
6.80
6.02
7.51
5.75
6.03
6.44
6.35
8.43
8.03
7.67
8.11
7.24
10.34
11.11
7.87
8.51
9.73

8.03
7.20
7.44
4.27
5.19
4.17
4.82
4.07
5.41
3.95
3.97
4.49
4.16
6.23
5.98
5.75
5.64
4.99
7.36
8.34
5.40
6.06
7.14

6.52
5.75
5.46
3.18
3.89
3.02
3.59
2.95
4.17
2.91
2.81
3.25
2.93
4.70
4.60
4.44
4.09
3.55
5.54
6.35
3.91
4.45
5.43

4.58
3.94
3.10
2.05
2.53
1.75
2.28
1.83
2.77
1.82
1.63
1.97
1.70
2.79
2.76
2.71
2.31
2.02
3.42
3.82
2.31
2.57
3.39

2.68
2.38
1.60
1.23
1.47
0.90
1.21
1.01
1.51
1.04
0.88
1.04
0.95
1.37
1.27
1.31
1.02
0.98
1.72
1.78
1.14
1.27
1.77

398

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.68
0.67
0.96
1.05
0.53
1.37
1.04
1.05
1.40
0.77
0.82
0.72
0.64
1.22
0.54
0.92
0.63
0.71
0.58
0.42
0.53
0.91
0.56

700
700
700
700
700
700
700
700
700
700
700
700
700
300
300
300
300
300
300
300
300
300
300

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

325
360
251
360
429
313
346
382
281
476
372
424
329
1,148
1,149
1,029
836
1,092
781
1,290
840
1,019
1,123

41
23
24
23
27
36
41
29
42
25
29
34
25
43
59
64
43
27
26
23
29
25
20

Subbase
26
35
17
56
41
30
31
42
31
52
36
32
37
20
19
22
19
28
21
16
26
24
27

Roadbed
14
15
21
30
25
38
29
35
24
34
40
33
37
20
21
21
26
27
16
15
23
21
15

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)

8

12

18

24

36

60

14.00
12.78
15.53
15.44
15.55
14.66
14.04
11.19
14.04
12.21
14.11
17.24
17.28
18.87
18.37
16.93
17.27
12.41
14.16
12.17
10.97
11.15
10.44

10.64
9.74
11.96
11.68
11.94
10.89
10.33
8.04
10.84
9.37
10.42
13.46
13.65
15.12
14.69
13.14
13.19
8.99
10.41
8.75
8.87
8.94
8.39

8.65
8.00
9.80
9.52
9.77
8.85
8.23
6.45
9.03
7.90
8.32
11.17
11.27
12.78
12.57
10.78
10.93
7.32
8.37
7.04
7.49
7.71
7.19

6.15
5.66
7.12
6.78
6.88
6.22
5.71
4.45
6.64
6.03
5.86
8.27
8.26
9.73
9.72
7.67
8.04
5.23
5.98
4.99
5.59
5.80
5.47

4.57
4.12
5.38
5.05
5.07
4.61
4.14
3.20
5.09
4.84
4.29
6.33
6.27
7.60
7.71
5.60
6.14
3.94
4.49
3.73
4.22
4.40
4.20

2.72
2.40
3.32
3.11
3.00
2.73
2.43
1.77
3.14
3.24
2.53
3.97
3.83
4.75
4.89
3.07
3.78
2.44
2.86
2.27
2.59
2.60
2.53

1.38
1.18
1.68
1.54
1.47
1.37
1.22
0.83
1.47
1.73
1.29
1.97
1.88
2.25
2.29
1.38
1.78
1.26
1.62
1.22
1.38
1.25
1.19

399

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.65
0.68
0.37
0.47
0.54
0.80
0.68
1.10
0.52
0.53
0.77
0.29
0.32
0.32
0.38
0.65
0.45
0.97
1.22
1.42
0.41
0.84
0.60

300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
400
400
400

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

920
1,102
794
704
860
742
758
803
715
707
752
710
813
700
603
881
538
680
848
805
2,068
1,943
1,697

26
26
31
34
24
32
29
51
59
76
30
35
28
44
63
24
49
49
19
35
13
34
64

Subbase
25
26
21
21
21
23
25
25
18
27
25
17
17
12
11
15
15
29
43
34
48
22
20

Roadbed
20
23
16
18
18
20
22
32
18
16
21
14
14
12
12
19
15
22
17
23
23
25
26

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)

8

12

18

24

36

60

11.74
14.13
13.62
12.18
13.24
19.63
12.18
14.07
14.66
14.28
13.20
15.10
14.00
17.22
15.85
15.04
14.88
12.68
12.51
14.24
11.14
13.37
12.74

9.29
11.15
10.92
9.58
10.48
16.12
9.85
10.91
11.77
11.51
10.22
11.86
10.58
13.22
12.01
11.09
11.60
9.67
9.38
10.55
8.11
10.35
9.71

7.96
9.22
9.14
7.88
8.66
13.79
8.55
9.01
10.07
9.97
8.59
10.01
8.61
11.00
9.76
8.83
9.64
7.87
7.72
8.54
6.68
8.75
8.11

6.03
6.60
6.68
5.59
6.19
10.32
6.53
6.35
7.41
7.59
6.18
7.36
5.84
8.11
6.94
5.99
6.82
5.44
5.51
5.94
4.64
6.55
5.93

4.60
4.81
4.85
4.03
4.53
7.76
4.99
4.65
5.51
5.83
4.50
5.56
4.08
6.17
5.19
4.33
4.95
3.91
4.01
4.40
3.34
5.01
4.38

2.76
2.73
2.65
2.27
2.65
4.57
2.99
2.77
3.26
3.59
2.60
3.46
2.27
3.82
3.18
2.56
2.91
2.28
2.31
2.75
1.89
3.15
2.57

1.25
1.26
1.11
1.09
1.35
2.06
1.34
1.49
1.57
1.78
1.30
1.74
1.09
1.86
1.65
1.38
1.50
1.14
1.14
1.50
0.94
1.57
1.18

400

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.68
0.38
0.29
0.34
0.33
0.43
0.69
0.61
0.67
0.75
0.89
0.62
0.78
0.46
0.46
0.74
0.61
0.58
0.93
0.71
1.33
0.64
0.71

400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,201
1,135
1,381
1,410
1,373
1,113
1,571
1,209
1,424
1,436
1,348
987
964
584
720
787
1,173
1,067
1,017
814
1,039
864
962

75
30
32
23
16
20
57
13
19
31
20
34
23
47
29
18
14
27
38
24
41
59
68

Subbase
16
17
14
24
29
11
15
35
19
18
25
19
21
14
21
29
27
26
23
31
27
19
19

Roadbed
24
23
26
27
22
14
23
20
19
17
23
17
27
16
18
22
20
26
26
20
32
19
28

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)

8

12

18

24

36

60

14.24
13.28
14.82
17.03
16.63
14.87
16.04
14.76
14.12
17.55
13.63
17.23
15.95
15.67
13.90
16.29
15.14
18.78
14.58
14.61
16.15
12.37
13.54

10.78
10.26
11.14
12.86
12.77
11.27
11.93
10.88
10.19
12.95
10.89
13.54
12.67
12.39
10.75
12.59
11.90
14.00
10.30
10.98
11.89
9.07
10.16

8.93
8.57
9.37
10.43
10.78
9.53
9.70
8.83
8.11
10.30
9.36
11.59
10.87
10.64
9.03
10.56
10.03
11.30
8.10
8.94
9.66
7.37
8.27

6.39
6.26
6.93
7.24
8.03
7.20
6.82
6.23
5.54
7.27
7.14
8.89
8.43
8.22
6.70
7.90
7.43
7.95
5.58
6.38
6.86
5.32
5.94

4.65
4.64
5.25
5.20
6.13
5.54
4.91
4.52
3.95
5.51
5.55
7.00
6.66
6.53
5.09
6.01
5.64
5.86
4.10
4.70
5.08
4.09
4.50

2.60
2.76
3.35
3.03
3.82
3.50
2.82
2.61
2.28
3.54
3.50
4.41
4.41
4.29
3.08
3.65
3.43
3.53
2.56
2.77
3.15
2.68
2.86

1.17
1.30
1.82
1.56
1.85
1.81
1.47
1.26
1.19
1.92
1.78
2.17
2.24
2.18
1.66
1.78
1.73
1.77
1.42
1.39
1.73
1.45
1.65

401

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.78
0.58
1.16
0.57
0.66
0.98
1.08
0.72
0.99
0.39
0.65
0.64
0.47
0.52
1.23
0.68
0.62
0.46
0.92
0.62
0.98
0.56
1.05

400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

830
947
825
796
605
675
840
661
747
514
1,215
630
684
673
1,197
720
1,027
530
584
773
708
645
971

45
49
34
17
54
57
19
41
26
28
45
61
68
71
23
47
32
29
29
35
23
53
20

Subbase
15
18
24
21
14
19
22
18
26
23
19
13
15
15
26
15
18
16
31
20
26
30
40

Roadbed
25
23
17
19
16
17
20
23
25
16
17
14
14
14
18
17
17
17
21
21
18
21
19

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005

8

12

18

24

36

60

15.16
15.88
15.56
13.05
12.83
14.70
15.81
15.53
13.73
14.73
12.67
11.49
11.57
10.78
11.15
11.17
9.24
11.92
10.85
11.33
11.31
11.60
11.94

11.57
12.43
12.78
8.69
8.60
9.89
10.66
10.15
9.39
10.61
8.72
8.67
8.74
8.03
8.44
8.43
6.79
9.26
8.12
8.41
8.47
8.74
9.13

9.69
10.44
11.17
6.31
6.27
7.11
7.62
7.19
6.73
7.81
6.30
6.92
6.96
6.39
6.78
6.83
5.45
7.59
6.54
6.70
6.66
7.00
7.39

7.33
7.86
8.97
4.31
4.15
4.65
5.20
4.77
4.53
5.54
4.42
4.96
4.85
4.55
4.89
4.94
3.94
5.57
4.69
4.69
4.61
4.93
5.29

5.72
6.07
7.33
3.20
2.98
3.39
3.94
3.50
3.40
4.21
3.41
3.72
3.54
3.36
3.74
3.80
2.95
4.19
3.52
3.48
3.31
3.61
4.06

3.71
3.86
4.92
1.99
1.72
1.99
2.42
2.03
2.13
2.70
2.13
2.27
2.04
2.04
2.37
2.42
1.81
2.45
2.12
2.10
1.88
2.11
2.57

1.97
2.08
2.45
1.04
0.77
0.89
1.19
0.95
1.08
1.31
1.02
1.17
0.99
1.06
1.20
1.27
0.88
1.10
1.04
1.15
0.91
1.00
1.36

402

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.59
0.68
0.27
1.64
0.52
0.91
1.27
1.19
1.19
1.10
1.31
0.58
0.48
0.72
0.28
0.51
0.33
0.28
0.49
1.13
0.49
0.29
0.52

400
400
400
200
200
200
200
200
200
200
200
275
275
275
275
275
275
275
275
275
275
275
275

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

621
910
711
451
394
328
309
276
440
422
354
1,017
1,048
1,104
904
971
887
989
912
1,165
1,059
970
1,030

56
31
102
32
46
39
33
37
29
36
51
38
35
35
52
46
80
62
57
22
33
43
33

Subbase
20
21
12
48
32
29
33
29
44
32
37
35
30
40
34
37
35
20
30
52
32
27
37

Roadbed
16
15
13
22
28
24
19
23
21
17
22
24
27
26
23
22
31
24
26
24
29
27
20

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-10-10-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005

8

12

18

24

36

60

10.70
9.97
12.15
11.89
8.10
7.79
7.61
7.75
7.69
6.50
7.64
7.47
7.98
8.06
8.10
7.68
8.53
8.62
7.67
8.51
8.00
8.45
8.97

7.85
7.45
9.09
8.81
6.53
6.24
6.06
6.23
6.12
5.09
6.13
5.94
6.45
6.61
6.53
6.18
6.78
6.80
6.15
6.76
6.33
6.59
7.15

6.27
5.88
7.25
7.00
5.76
5.44
5.30
5.44
5.32
4.42
5.40
5.17
5.68
5.87
5.70
5.40
5.87
5.78
5.37
5.88
5.47
5.61
6.20

4.41
4.09
5.11
4.84
4.58
4.26
4.19
4.31
4.18
3.45
4.32
4.04
4.48
4.77
4.49
4.24
4.55
4.42
4.22
4.58
4.24
4.23
4.87

3.27
2.98
3.75
3.46
3.71
3.40
3.39
3.50
3.36
2.77
3.50
3.23
3.63
3.92
3.53
3.38
3.57
3.39
3.34
3.65
3.31
3.26
3.89

2.02
1.72
2.17
1.96
2.43
2.10
2.17
2.26
2.19
1.77
2.27
2.04
2.34
2.59
2.15
2.08
2.12
1.96
2.07
2.34
2.04
2.00
2.55

1.04
0.79
0.99
0.92
1.21
0.94
1.04
1.10
1.12
0.85
1.05
0.95
1.11
1.27
0.97
0.93
0.93
0.78
0.89
1.17
0.98
0.92
1.31

403

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.61
0.31
0.27
0.41
1.16
1.18
1.26
1.13
1.30
1.32
0.97
1.20
1.08
1.16
1.38
1.28
1.49
1.05
0.98
1.34
1.45
1.02
1.22

275
275
275
275
160
160
160
160
160
160
160
160
160
160
160
160
160
160
160
160
160
160
160

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

964
939
770
909
2,277
2,199
2,010
2,057
2,370
2,012
1,696
2,112
2,197
2,319
2,816
2,546
2,282
1,772
2,002
2,251
2,608
1,917
2,144

41
61
55
40
87
103
115
110
64
136
166
106
104
122
57
89
64
89
133
52
41
56
44

Subbase
39
29
23
26
44
35
41
41
58
50
33
41
38
37
38
36
34
27
30
50
54
43
55

Roadbed
26
34
27
29
17
21
20
18
18
24
20
21
18
16
21
22
21
25
23
17
20
22
15

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-11-2005
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)

8

12

18

24

36

60

8.29
7.62
8.69
8.18
8.08
9.45
7.87
8.34
8.11
8.04
7.68
12.08
12.69
13.48
12.37
12.10
13.60
14.18
12.63
11.86
12.61
11.54
11.93

6.46
5.92
6.89
6.44
6.55
7.82
6.45
6.76
6.54
6.45
6.16
8.63
9.28
9.75
8.76
8.91
9.68
10.11
9.14
8.66
9.26
8.30
8.59

5.56
5.06
5.93
5.48
5.70
6.91
5.65
5.87
5.71
5.57
5.32
6.58
7.26
7.53
6.63
6.91
7.31
7.51
7.03
6.70
7.17
6.41
6.60

4.28
3.81
4.62
4.23
4.46
5.53
4.45
4.63
4.50
4.37
4.19
4.40
4.96
5.09
4.38
4.70
4.81
4.78
4.60
4.58
4.94
4.30
4.51

3.37
2.95
3.63
3.31
3.56
4.55
3.51
3.69
3.58
3.45
3.35
3.22
3.62
3.71
3.15
3.40
3.40
3.27
3.21
3.37
3.68
3.09
3.29

2.12
1.76
2.27
2.04
2.21
3.00
2.15
2.27
2.23
2.08
2.03
1.96
2.17
2.22
1.82
1.97
1.91
1.72
1.76
2.00
2.25
1.76
1.90

1.06
0.81
1.00
0.93
1.03
1.44
0.94
1.04
1.04
0.96
0.97
1.00
1.11
1.09
0.89
0.93
0.88
0.74
0.83
0.99
1.12
0.86
0.88

404

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
1.60
1.57
0.84
1.06
1.11
0.83
1.00
1.30
1.23
1.55
1.84
0.60
0.56
0.40
0.60
0.38
0.46
0.73
0.51
0.50
0.51
0.72
0.42

160
160
160
160
160
160
160
160
160
160
160
250
250
250
250
250
250
250
250
250
250
250
250

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

2,193
2,397
1,578
1,763
2,645
2,065
3,061
2,594
2,590
2,769
3,007
713
826
640
645
758
562
532
781
765
682
797
601

43
48
106
88
63
95
65
63
68
49
43
31
27
33
35
39
36
34
28
37
37
34
51

Subbase
59
51
31
38
40
31
34
36
39
42
52
40
36
30
33
29
26
22
29
33
32
33
27

Roadbed
19
24
20
21
19
14
21
19
19
21
20
26
23
23
28
27
28
32
29
26
23
29
28

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-B-M84-CS9011-09-13-2005-(2)
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002

8

12

18

24

36

60

11.80
11.91
11.38
11.37
10.75
10.74
11.14
11.15
10.99
11.51
11.13
10.85
10.85
10.62
10.87
10.93
11.01
10.60
11.43
10.85
11.06
11.73
11.42

8.35
8.44
7.98
8.07
9.07
9.05
9.32
9.26
9.13
9.53
9.20
8.89
9.02
8.83
9.05
8.99
8.85
8.74
9.37
8.86
8.75
9.26
9.29

6.37
6.47
6.13
6.18
7.76
7.77
8.06
7.92
7.81
8.00
7.76
7.60
7.60
7.53
7.80
7.61
7.39
7.43
7.86
7.48
7.20
7.63
7.82

4.23
4.34
4.12
4.16
6.03
6.06
6.27
6.19
6.07
6.09
5.92
5.88
5.83
5.86
6.07
5.79
5.51
5.71
5.97
5.71
5.29
5.78
5.87

3.04
3.15
3.03
2.98
4.64
4.66
4.80
4.75
4.64
4.66
4.49
4.53
4.42
4.50
4.65
4.42
4.17
4.33
4.53
4.33
3.95
4.33
4.42

1.74
1.85
1.83
1.72
2.68
2.72
2.73
2.72
2.64
2.64
2.57
2.64
2.53
2.61
2.65
2.55
2.36
2.52
2.63
2.51
2.24
2.48
2.52

0.82
0.86
0.88
0.81
1.18
1.18
1.15
1.22
1.14
1.14
1.15
1.17
1.13
1.18
1.14
1.11
1.10
1.15
1.14
1.11
1.10
1.17
1.15

405

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.51
0.49
0.52
0.30
0.32
0.21
0.30
0.56
0.45
0.63
0.34
0.51
0.38
0.45
0.41
0.37
0.64
0.23
0.32
0.27
0.65
0.81
0.34

250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

617
572
593
643
1,153
1,153
1,147
1,093
1,084
883
941
954
991
1,090
1,139
900
817
1,009
791
881
736
679
838

44
48
48
47
5
6
4
5
5
9
7
12
7
6
5
11
10
7
16
12
9
14
8

Subbase
30
29
34
30
375
213
434
440
263
49
133
39
157
236
365
42
88
170
28
43
134
43
112

Roadbed
30
29
29
30
23
23
23
22
23
23
23
23
24
23
24
23
24
23
23
23
24
22
23

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008

8

12

18

24

36

60

13.08
10.71
10.66
10.67
11.67
11.25
11.30
10.64
10.51
10.58
11.27
10.76
10.72
10.72
10.56
10.39
10.51
11.01
11.17
13.55
12.28
12.33
12.69

10.38
8.66
8.81
8.58
9.08
9.02
9.09
8.73
8.66
8.67
8.95
8.78
8.93
8.71
8.45
8.65
8.51
8.86
8.94
10.03
9.08
9.05
9.71

8.58
7.31
7.47
7.31
7.45
7.52
7.52
7.44
7.41
7.31
7.45
7.45
7.44
7.39
7.13
7.36
7.23
7.48
7.41
8.01
7.30
7.37
7.95

6.39
5.56
5.70
5.59
5.38
5.58
5.62
5.66
5.71
5.60
5.51
5.72
5.67
5.64
5.54
5.67
5.51
5.66
5.55
5.89
5.46
5.41
6.01

4.72
4.21
4.33
4.21
3.99
4.14
4.20
4.32
4.33
4.28
4.09
4.37
4.32
4.36
4.22
4.32
4.20
4.28
4.16
4.53
4.27
4.19
4.73

2.64
2.45
2.47
2.36
2.23
2.36
2.37
2.49
2.45
2.44
2.29
2.48
2.49
2.49
2.51
2.51
2.40
2.44
2.35
2.85
2.85
2.70
3.11

1.14
1.14
1.10
1.06
1.09
1.10
1.07
1.14
1.10
1.07
1.06
1.17
1.09
1.07
1.13
1.10
1.06
1.09
1.10
1.49
1.64
1.54
1.70

406

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.28
0.37
0.36
0.79
0.76
0.22
0.43
0.38
0.42
0.55
0.45
0.74
0.60
0.66
0.59
0.19
0.53
0.46
0.60
0.61
0.75
1.21
0.50

250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
350
350
350
350

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

596
872
1,005
973
649
768
747
974
1,088
942
746
1,012
899
863
773
1,046
910
818
781
794
927
1,019
1,049

15
11
7
7
10
9
12
7
5
10
10
6
12
19
27
8
12
13
9
60
60
55
65

Subbase
25
69
190
195
97
90
48
148
443
53
75
409
40
26
25
99
43
41
94
24
33
32
26

Roadbed
22
23
24
25
24
24
24
23
24
24
24
23
24
24
23
24
24
24
24
21
19
20
18

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-Su-M38-CS66042-05-20-2008
flex-M-M53-CS50015-04-04-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US141-CS7022-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008

8

12

18

24

36

60

13.27
16.71
15.42
14.15
14.16
14.77
7.78
13.87
16.27
17.27
13.99
12.02
15.52
16.04
17.84
19.76
17.61
17.99
17.49
17.11
18.45
16.35
15.97

10.11
13.13
12.18
10.04
10.68
11.37
6.56
11.29
13.63
13.95
11.50
9.35
12.82
13.05
14.50
15.96
14.18
14.62
13.99
12.61
13.93
12.06
11.64

8.27
10.71
10.11
7.61
8.43
9.24
5.97
9.16
11.46
11.29
9.61
7.62
10.73
10.78
11.90
13.02
11.65
12.07
11.38
9.96
10.91
9.33
9.02

6.34
8.03
8.04
5.29
6.20
6.90
5.24
6.58
8.70
7.98
7.24
5.55
8.15
7.94
8.75
9.54
8.70
8.96
8.31
7.16
7.94
6.70
6.55

5.03
6.20
6.52
3.96
4.77
5.36
4.54
4.81
6.68
5.67
5.56
4.25
6.32
5.96
6.52
7.17
6.69
6.92
6.25
5.50
6.13
5.18
5.11

3.29
3.91
4.47
2.39
2.98
3.39
3.40
2.58
3.94
2.87
3.36
2.63
3.85
3.45
3.62
4.17
4.12
4.41
3.78
3.36
3.77
3.23
3.27

1.77
1.94
2.58
1.26
1.55
1.74
1.84
1.02
1.84
1.12
1.62
1.38
1.85
1.53
1.53
1.99
2.13
2.33
1.95
1.55
1.75
1.57
1.65

407

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.60
0.23
0.72
0.88
0.61
0.41
0.18
0.85
0.47
0.60
0.41
0.48
0.48
0.59
0.98
0.57
0.46
0.71
0.48
1.13
1.01
1.21
1.37

350
350
350
350
350
350
300
700
700
700
700
700
700
700
700
700
700
700
700
150
150
150
150

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

841
926
923
672
840
928
621
907
1,097
792
1,018
796
907
778
723
626
684
675
680
1,815
1,816
1,889
1,809

76
50
64
46
54
56
311
36
21
19
35
45
35
34
29
23
27
25
22
35
32
33
35

Subbase
23
16
22
27
23
20
16
12
13
11
15
24
13
12
10
12
15
16
16
23
22
31
36

Roadbed
18
16
12
24
20
18
19
32
19
28
22
26
19
22
22
17
16
15
18
12
11
12
11

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US41-CS7013-05-19-2008
flex-Su-US2-CS27022-05-20-2008
flex-Su-US2-CS27022-05-20-2008
flex-Su-US2-CS27022-05-20-2008
flex-N-US131-CS67017-05-01-2002
flex-N-US131-CS67017-05-01-2002
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001

8

12

18

24

36

60

17.59
17.00
18.65
17.73
17.97
18.77
16.97
7.39
9.28
13.40
10.66
10.74
12.52
11.72
11.63
13.39
12.11
11.94
12.47
13.54
11.63
11.94
11.33

13.09
13.12
13.97
12.87
13.35
13.85
12.35
5.46
6.19
9.48
7.53
7.85
9.69
9.06
8.67
9.97
9.11
8.75
9.30
9.92
8.54
8.93
8.62

10.17
10.42
10.94
9.91
10.57
10.71
9.56
4.58
4.65
7.15
6.29
6.64
7.64
7.21
6.81
7.72
7.01
6.70
7.17
7.52
6.56
6.93
6.81

7.36
7.67
7.95
7.12
7.79
7.81
6.89
3.88
3.53
4.78
4.89
5.33
5.40
5.08
4.84
5.27
4.93
4.68
5.08
5.13
4.58
4.97
4.75

5.59
5.96
6.19
5.52
6.18
6.08
5.34
3.44
3.08
3.40
3.85
4.36
4.09
3.87
3.77
3.97
3.71
3.59
3.94
3.86
3.55
3.90
3.62

3.37
3.81
3.92
3.51
4.06
3.92
3.38
2.78
2.61
1.92
2.41
2.90
2.60
2.52
2.56
2.59
2.44
2.45
2.65
2.53
2.41
2.63
2.40

1.46
1.83
1.91
1.77
2.09
1.94
1.71
1.67
1.77
0.84
1.18
1.49
1.49
1.46
1.53
1.46
1.42
1.47
1.50
1.41
1.45
1.47
1.38

408

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.84
0.65
1.00
1.37
1.04
0.98
1.46
1.46
0.17
0.41
0.17
0.35
1.39
1.47
1.24
1.83
1.42
1.42
1.79
1.99
1.45
1.73
1.67

150
150
150
150
150
150
150
250
250
250
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,651
2,260
1,714
1,594
1,671
1,481
1,725
427
808
686
220
223
348
365
320
261
304
281
271
235
288
287
342

37
32
30
30
33
31
32
238
44
51
169
220
7
8
11
10
9
10
15
13
11
20
10

Subbase
19
26
26
33
30
27
34
105
291
23
22
22
86
97
93
57
81
102
50
47
94
46
81

Roadbed
12
10
10
10
9
9
11
16
14
30
30
25
24
25
24
24
25
24
24
25
25
24
26

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001

8

12

18

24

36

60

10.89
11.73
11.80
11.60
11.65
11.76
11.33
11.51
12.43
12.48
11.39
18.12
14.84
13.10
14.29
13.21
11.76
13.08
11.59
11.98
11.72
12.59
12.31

8.27
8.90
9.06
8.99
9.07
9.04
8.93
8.91
9.49
9.96
8.90
13.47
10.50
9.42
10.20
9.75
8.73
9.72
9.25
9.37
9.09
9.62
9.41

6.50
6.85
7.13
7.10
7.17
7.14
7.00
6.98
7.48
7.98
7.10
10.52
7.92
7.11
7.69
7.55
6.89
7.52
7.47
7.49
7.15
7.48
7.32

4.60
4.88
5.05
5.07
5.12
5.05
4.92
4.93
5.40
5.93
5.27
7.67
5.66
5.00
5.43
5.47
5.05
5.44
5.59
5.55
5.20
5.39
5.34

3.54
3.81
3.93
3.91
3.91
3.85
3.73
3.71
4.20
4.73
4.21
5.92
4.46
3.97
4.33
4.36
4.06
4.37
4.49
4.44
4.12
4.27
4.23

2.45
2.55
2.65
2.57
2.55
2.49
2.39
2.47
2.79
3.30
3.03
3.81
3.11
2.90
3.08
3.10
2.92
3.15
3.20
3.14
2.94
3.00
3.06

1.43
1.46
1.49
1.47
1.42
1.41
1.39
1.38
1.51
1.93
1.94
1.94
1.85
1.81
1.89
1.89
1.81
1.93
1.93
1.88
1.80
1.80
1.81

409

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.77
1.84
1.99
1.59
1.63
1.50
1.80
1.94
1.74
1.71
1.30
1.68
1.38
1.65
1.57
1.35
1.12
1.59
1.59
1.51
1.74
1.80
1.96

340
309
323
354
359
347
384
343
295
354
369
166
188
224
204
251
296
254
394
353
333
287
289

11
13
13
10
10
10
6
11
20
11
8
29
14
10
11
11
13
12
10
11
10
11
13

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
90
62
55
69
59
65
134
63
35
64
181
17
55
122
86
84
101
89
99
85
115
79
76

Roadbed
25
24
24
24
25
25
26
26
23
18
18
17
19
20
19
19
20
19
19
19
20
20
20

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)

8

12

18

24

36

60

10.85
10.54
12.65
12.52
11.72
11.63
13.39
12.11
11.94
12.47
13.54
11.63
11.94
11.33
10.89
11.73
11.80
11.60
11.65
11.76
11.33
11.51
12.43

8.36
8.03
9.38
9.69
9.06
8.67
9.97
9.11
8.75
9.30
9.92
8.54
8.93
8.62
8.27
8.90
9.06
8.99
9.07
9.04
8.93
8.91
9.49

6.62
6.43
7.33
7.64
7.21
6.81
7.72
7.01
6.70
7.17
7.52
6.56
6.93
6.81
6.50
6.85
7.13
7.10
7.17
7.14
7.00
6.98
7.48

4.88
4.81
5.31
5.40
5.08
4.84
5.27
4.93
4.68
5.08
5.13
4.58
4.97
4.75
4.60
4.88
5.05
5.07
5.12
5.05
4.92
4.93
5.40

3.90
3.90
4.22
4.09
3.87
3.77
3.97
3.71
3.59
3.94
3.86
3.55
3.90
3.62
3.54
3.81
3.93
3.91
3.91
3.85
3.73
3.71
4.20

2.86
2.86
3.00
2.60
2.52
2.56
2.59
2.44
2.45
2.65
2.53
2.41
2.63
2.40
2.45
2.55
2.65
2.57
2.55
2.49
2.39
2.47
2.79

1.81
1.81
1.84
1.49
1.46
1.53
1.46
1.42
1.47
1.50
1.41
1.45
1.47
1.38
1.43
1.46
1.49
1.47
1.42
1.41
1.39
1.38
1.51

410

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.44
1.04
1.25
1.39
1.47
1.24
1.83
1.42
1.42
1.79
1.99
1.45
1.73
1.67
1.77
1.84
1.99
1.59
1.63
1.50
1.80
1.94
1.74

358
371
274
348
365
320
261
304
281
271
235
288
287
342
340
309
323
354
359
347
384
343
295

10
12
11
7
8
11
10
9
10
15
13
11
20
10
11
13
13
10
10
10
6
11
20

700
700
700
736
737
738
739
740
741
742
743
745
746
748
749
750
751
752
753
754
755
756
757

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
162
140
92
86
97
93
57
81
102
50
47
94
46
81
90
62
55
69
59
65
134
63
35

Roadbed
20
20
20
24
25
24
24
25
24
24
25
25
24
26
25
24
24
24
25
25
26
26
23

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-M55-CS77022-8-20-2001-(2)
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997

8

12

18

24

36

60

12.48
11.39
13.77
18.12
14.84
13.10
14.29
13.21
11.76
13.08
11.59
11.98
11.72
12.59
12.31
10.85
10.54
12.65
9.80
10.00
11.61
13.74
12.48

9.96
8.90
10.05
13.47
10.50
9.42
10.20
9.75
8.73
9.72
9.25
9.37
9.09
9.62
9.41
8.36
8.03
9.38
8.82
7.95
7.40
8.15
9.17

7.98
7.10
7.74
10.52
7.92
7.11
7.69
7.55
6.89
7.52
7.47
7.49
7.15
7.48
7.32
6.62
6.43
7.33
5.55
5.24
5.83
6.26
7.01

5.93
5.27
5.58
7.67
5.66
5.00
5.43
5.47
5.05
5.44
5.59
5.55
5.20
5.39
5.34
4.88
4.81
5.31
4.13
3.58
4.33
4.57
5.00

4.73
4.21
4.37
5.92
4.46
3.97
4.33
4.36
4.06
4.37
4.49
4.44
4.12
4.27
4.23
3.90
3.90
4.22
3.19
2.40
3.23
3.35
3.62

3.30
3.03
3.03
3.81
3.11
2.90
3.08
3.10
2.92
3.15
3.20
3.14
2.94
3.00
3.06
2.86
2.86
3.00
2.05
1.34
1.93
2.09
2.17

1.93
1.94
1.88
1.94
1.85
1.81
1.89
1.89
1.81
1.93
1.93
1.88
1.80
1.80
1.81
1.81
1.81
1.84
1.14
0.83
1.06
1.22
1.34

411

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.71
1.30
1.04
1.68
1.38
1.65
1.58
1.35
1.12
1.59
1.59
1.51
1.74
1.80
1.96
1.44
1.04
1.26
1.77
1.23
1.81
1.19
0.45

354
369
242
168
188
224
204
251
296
255
394
353
333
287
289
358
371
275
199
590
435
211
840

11
8
9
28
14
10
11
11
13
12
10
11
10
11
13
10
12
11
83
11
36
51
13

758
759
760
761
762
763
765
766
767
768
769
770
771
772
773
774
775
776
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
64
181
92
17
55
122
84
84
101
89
99
85
115
79
76
162
140
92
32
52
36
29
21

Roadbed
18
18
19
17
19
20
19
19
20
19
19
19
20
20
20
20
20
20
35
37
24
40
29

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-11-12-1997
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999

8

12

18

24

36

60

14.02
9.92
9.29
9.29
10.94
9.13
10.94
14.06
11.73
10.35
10.67
11.81
10.35
11.81
11.57
8.78
9.33
7.83
7.99
8.19
7.99
7.76
7.76

9.96
8.46
8.07
8.46
9.21
8.11
10.59
9.76
8.50
7.64
7.95
8.62
8.70
8.82
7.76
6.50
6.61
5.63
5.75
6.34
5.67
5.79
5.91

6.89
7.17
6.97
7.36
7.87
7.09
7.48
5.79
6.69
6.22
5.67
6.38
7.52
6.77
6.10
5.12
5.00
4.33
4.41
5.16
4.25
4.61
4.72

4.65
5.51
5.71
4.06
6.10
5.83
5.35
4.53
5.08
4.76
4.06
4.21
6.26
5.20
4.72
3.94
3.70
3.27
3.31
4.13
3.27
3.62
3.82

3.35
4.06
4.37
3.15
4.13
4.29
3.94
3.50
3.82
3.54
2.99
3.11
4.69
4.06
3.66
2.99
2.64
2.40
2.48
3.15
2.40
2.80
2.95

2.01
2.20
2.24
1.97
2.05
2.44
2.48
2.17
2.20
2.09
1.77
1.73
2.80
2.76
2.32
2.01
1.69
1.46
1.61
2.13
1.69
1.81
1.97

1.22
1.10
1.22
1.02
1.18
1.26
1.57
1.22
1.10
0.83
0.79
0.75
1.46
1.81
1.30
1.26
0.87
0.71
0.83
1.02
1.06
0.94
1.02

412

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.33
0.57
0.59
0.47
0.71
0.61
0.59
0.13
1.13
0.51
0.64
0.96
1.00
0.36
0.61
1.32
1.65
1.10
1.31
1.51
1.86
0.96
1.28

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,233
429
923
1,021
366
828
992
677
1,178
756
1,056
428
1,159
917
878
501
314
380
357
455
419
437
453

17
64
85
39
141
69
51
110
22
101
14
50
11
53
25
27
52
75
73
96
36
84
94

Subbase
29
30
17
31
17
28
38
34
83
28
119
37
77
47
46
100
33
29
35
20
117
30
28

Roadbed
23
27
29
40
44
41
57
28
31
30
20
19
27
28
31
28
38
46
41
34
33
36
34

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)

8

12

18

24

36

60

10.20
9.41
8.74
9.09
8.35
8.74
8.70
8.82
8.90
10.20
9.33
8.35
9.02
6.93
8.23
7.52
8.62
8.50
7.95
7.36
7.44
6.50
7.01

7.64
6.85
6.30
6.34
5.59
6.22
5.87
6.30
6.50
7.28
6.18
5.55
6.22
5.08
6.10
5.63
6.30
6.18
5.67
5.43
5.43
4.49
5.20

6.14
5.39
4.92
4.92
4.09
4.88
4.45
4.96
5.20
5.75
4.53
4.06
4.61
3.98
4.80
4.45
4.80
4.84
4.41
4.33
4.33
3.46
4.17

4.76
4.13
3.86
3.86
2.95
3.74
3.27
3.86
4.06
4.53
3.11
2.95
3.35
2.95
3.58
3.50
3.74
3.62
3.39
3.31
3.35
2.48
3.31

3.66
3.11
2.91
2.91
2.09
2.72
2.40
2.91
3.03
3.46
2.28
2.20
2.52
2.09
2.72
2.68
2.83
2.72
2.60
2.48
2.56
1.81
2.52

2.32
2.01
1.85
1.85
1.26
1.69
1.46
1.93
1.89
2.40
1.61
1.57
1.61
1.42
2.01
1.81
2.01
1.77
1.85
1.73
1.69
1.10
1.57

1.10
1.02
0.94
0.94
0.59
0.83
0.75
1.02
0.91
1.30
1.02
1.10
0.98
0.83
1.18
1.14
1.30
1.10
1.22
1.14
1.10
0.51
0.87

413

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.77
0.95
1.22
1.24
1.66
1.23
0.83
1.05
0.97
1.26
0.56
1.97
1.57
1.59
1.68
1.59
1.70
1.22
1.38
1.15
1.88
1.09
1.62

325
329
327
266
264
336
278
322
354
261
299
369
327
603
448
608
445
496
465
655
631
394
576

73
66
79
85
74
71
67
74
80
69
26
25
36
33
38
34
30
26
33
23
28
98
71

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
17
26
26
26
30
25
32
31
21
30
165
388
69
107
87
110
139
105
168
322
166
35
40

Roadbed
31
33
36
36
54
40
44
33
37
26
34
32
35
42
29
30
27
31
29
31
32
64
40

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)
flex-N-I75-CS69014-08-03-1999-(2)

8

12

18

24

36

60

8.11
7.60
8.46
10.20
9.41
8.58
7.76
8.31
8.35
7.99
7.44
8.03
8.66
8.58
7.48
7.76
8.86
7.17
7.64
8.54
8.35
6.18
7.68

6.02
5.47
6.14
7.56
7.01
6.57
5.83
5.79
6.02
5.75
5.47
5.83
6.38
6.26
5.24
5.39
6.14
4.88
5.39
5.98
6.10
4.65
5.79

4.88
4.29
4.76
5.94
5.51
5.35
4.57
4.45
4.57
4.45
4.25
4.53
5.00
4.84
3.98
3.98
4.69
3.66
4.09
4.53
4.69
3.74
4.57

3.94
3.27
3.54
4.37
4.29
4.21
3.50
3.39
3.39
3.31
3.31
3.50
3.90
3.62
3.07
2.91
3.43
2.52
2.87
3.31
3.50
2.95
3.54

3.07
2.48
2.64
3.19
3.27
3.23
2.60
2.56
2.44
2.32
2.44
2.64
2.91
2.64
2.36
2.13
2.48
1.73
2.01
2.40
2.56
2.24
2.68

2.09
1.61
1.61
1.85
2.17
2.01
1.61
1.65
1.42
1.34
1.61
1.69
1.97
1.65
1.73
1.42
1.61
1.02
1.14
1.61
1.69
1.57
1.77

1.18
0.87
0.83
0.83
1.18
1.02
0.79
0.91
0.67
0.63
1.02
0.91
1.06
0.83
1.18
0.91
1.02
0.63
0.71
1.02
1.10
1.06
1.14

414

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.08
0.77
0.80
0.72
1.09
0.93
1.16
1.02
1.23
1.19
1.94
1.19
1.40
1.20
1.74
1.71
1.59
1.38
1.68
1.28
1.48
1.54
1.60

432
406
392
356
378
520
467
323
374
430
605
393
382
381
453
436
414
533
601
432
545
872
690

80
74
59
51
56
61
70
70
62
58
27
70
62
58
34
30
25
26
18
26
19
25
20

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
38
40
32
18
33
24
27
40
26
28
149
36
36
30
260
156
124
153
247
152
284
481
258

Roadbed
30
39
40
39
29
33
42
38
48
51
34
38
32
40
30
38
34
56
50
35
32
33
30

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-11-23-1997
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999

8

12

18

24

36

60

11.14
11.30
11.14
12.36
13.23
8.11
9.76
8.86
7.52
7.87
8.58
9.21
8.62
9.33
10.91
9.88
9.92
9.92
11.30
10.63
10.71
9.92
8.90

7.32
8.15
7.48
8.27
9.29
6.57
6.81
5.94
5.55
5.35
5.79
6.30
5.71
6.22
7.28
7.40
7.52
7.56
8.43
7.52
7.91
7.13
6.26

5.79
6.14
5.87
6.26
6.89
5.51
5.20
4.57
4.41
4.09
4.33
4.92
4.33
4.84
5.47
5.91
6.06
6.26
6.65
5.71
6.22
5.55
4.80

4.21
4.53
4.25
4.61
5.04
4.37
4.06
3.50
3.43
3.19
3.31
3.90
3.35
3.86
4.09
4.57
4.80
5.00
5.00
4.17
4.61
4.29
3.58

2.95
3.46
3.11
3.50
3.78
3.39
3.23
2.64
2.60
2.32
2.44
3.03
2.48
3.03
3.15
3.39
3.70
3.90
3.78
3.07
3.35
3.23
2.72

1.85
2.24
1.81
2.09
2.52
2.24
2.32
1.77
1.73
1.54
1.54
2.09
1.65
2.09
2.09
2.20
2.48
2.56
2.44
1.93
1.89
2.01
1.89

1.06
1.38
0.91
1.06
1.61
1.38
1.54
1.10
0.91
0.83
0.87
1.18
0.87
1.22
1.10
1.06
1.22
1.26
1.22
0.94
0.83
1.06
1.26

415

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
1.98
1.52
0.83
1.09
1.60
0.65
1.60
1.89
1.07
1.72
1.82
1.05
1.49
1.20
1.20
1.42
1.24
0.62
1.12
1.37
0.68
1.29
1.43

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

304
344
259
197
281
1,055
296
309
434
308
289
242
233
218
186
356
336
373
305
256
346
316
418

37
28
57
60
20
13
39
49
81
81
62
82
87
83
64
66
82
84
51
55
49
58
25

Subbase
45
68
25
23
97
399
99
67
35
41
43
39
35
43
30
21
19
17
21
24
16
27
202

Roadbed
35
28
40
34
24
27
23
32
37
41
39
29
39
28
30
32
29
28
28
35
39
32
28

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)

8

12

18

24

36

60

9.29
7.32
8.90
9.06
10.91
9.49
11.46
9.45
8.62
7.87
9.33
8.46
8.94
9.72
8.35
7.44
8.86
8.82
8.11
8.03
9.33
9.61
9.06

6.85
4.96
5.91
6.18
7.40
6.69
8.27
6.61
6.14
5.75
5.98
5.35
5.63
6.14
5.59
5.12
5.55
5.35
5.00
5.16
6.06
6.22
6.02

5.39
3.74
4.33
4.72
5.59
5.08
6.30
5.20
4.96
4.45
4.25
4.02
4.29
4.57
4.21
4.02
4.17
3.74
3.74
4.17
4.80
5.04
4.84

4.25
2.80
3.07
3.54
4.02
3.78
4.69
3.98
3.82
3.31
2.99
3.11
3.19
3.35
3.11
2.95
3.11
2.64
2.76
3.31
3.66
4.02
3.82

3.27
2.05
2.28
2.76
3.11
2.95
3.46
3.07
2.95
2.44
2.20
2.32
2.32
2.44
2.20
2.20
2.32
2.01
2.09
2.56
2.72
3.15
2.95

2.20
1.34
1.54
2.05
2.24
2.01
2.24
2.09
2.09
1.61
1.50
1.57
1.46
1.54
1.46
1.46
1.54
1.46
1.34
1.77
1.73
2.17
2.01

1.18
0.83
0.94
1.34
1.46
1.34
1.42
1.34
1.38
0.98
0.98
0.94
0.83
0.87
0.91
0.94
0.87
0.98
0.79
1.02
0.94
1.30
1.18

416

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.20
1.86
0.99
0.84
0.55
1.81
1.57
1.63
1.44
1.00
1.91
1.89
1.73
1.36
1.96
1.75
0.99
1.81
1.49
1.33
1.45
1.59
1.42

337
417
299
321
268
371
355
364
464
523
274
234
242
214
372
487
214
238
232
234
237
204
246

72
47
37
35
26
27
18
36
31
29
29
71
64
56
34
32
71
36
75
112
76
88
83

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
30
90
92
148
133
146
99
82
139
108
149
60
45
42
95
146
48
218
58
47
33
42
42

Roadbed
29
43
37
26
24
26
24
26
26
35
36
37
42
39
38
37
39
36
44
34
36
27
30

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-N-I75-CS69014-08-04-1999-(2)
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998

8

12

18

24

36

60

8.74
9.33
7.76
7.44
8.43
7.83
7.13
7.28
7.01
6.18
7.05
7.20
8.31
6.61
7.48
7.83
14.21
19.80
18.35
23.46
22.17
18.58
23.03

5.31
6.46
5.94
5.67
6.34
6.06
4.92
5.20
5.08
4.61
5.16
5.08
6.10
5.00
5.35
5.75
9.53
14.84
13.27
15.47
16.42
13.07
14.57

3.98
5.08
4.69
4.61
5.20
4.92
3.86
4.09
4.09
3.66
4.09
3.82
4.80
3.94
4.06
4.49
7.48
12.01
10.55
11.34
12.91
10.55
10.43

2.87
3.94
3.70
3.66
4.13
4.02
2.87
2.99
3.11
2.95
3.15
2.87
3.58
2.99
2.95
3.35
6.14
9.45
8.27
7.80
10.28
9.06
7.36

2.13
3.03
2.87
2.80
3.31
3.23
2.05
2.24
2.28
2.24
2.44
2.20
2.60
2.24
2.17
2.48
4.84
7.28
6.50
5.24
8.15
7.44
5.24

1.26
1.97
1.97
1.81
2.17
2.20
1.42
1.54
1.50
1.61
1.61
1.54
1.77
1.54
1.46
1.50
3.11
4.53
4.21
2.60
5.43
5.39
2.76

0.71
1.14
1.10
0.91
1.22
1.14
0.79
1.02
0.98
1.10
1.06
1.06
1.18
1.02
0.94
0.94
1.69
2.05
2.24
1.02
2.80
3.15
1.14

417

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.94
1.43
1.29
0.94
1.07
1.13
1.84
0.96
1.76
1.99
1.92
2.00
1.16
1.10
1.17
1.97
1.70
0.90
0.88
1.12
1.51
1.39
1.68

215
293
516
534
467
444
434
603
762
833
670
536
587
792
538
673
128
149
145
89
116
103
72

71
62
68
93
76
122
62
24
19
29
29
28
17
22
24
17
106
58
46
29
46
96
43

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
43
39
45
26
34
24
64
369
457
464
198
402
456
499
272
260
22
9
16
9
12
21
10

Roadbed
48
30
33
39
29
32
45
35
36
32
33
34
30
35
37
38
22
17
16
29
13
12
27

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998

8

12

18

24

36

60

30.63
19.21
16.50
26.30
15.59
12.95
15.47
17.52
21.38
19.21
20.79
21.54
20.20
19.21
16.38
32.72
29.72
21.69
19.25
22.72
22.72
17.48
16.14

21.54
14.02
11.38
18.27
10.94
8.86
10.83
11.65
14.92
12.87
14.88
14.37
14.17
12.99
11.30
23.27
22.72
16.14
12.52
16.30
14.57
12.09
11.38

16.89
11.42
8.86
14.21
8.39
6.81
8.43
9.02
11.85
9.69
11.54
10.79
10.98
9.96
9.06
17.52
19.69
12.95
9.29
12.80
11.06
9.72
9.13

13.31
9.21
6.93
10.31
6.50
5.08
6.34
6.93
9.57
7.48
8.54
7.76
8.07
7.95
7.36
12.20
16.46
10.55
7.01
9.65
8.07
7.95
7.52

10.31
6.89
5.55
7.36
5.16
3.78
4.72
5.08
7.56
5.94
6.42
5.71
6.06
6.14
5.79
8.46
13.31
8.35
5.39
7.28
5.91
6.26
5.91

6.18
3.90
3.82
3.82
3.50
2.24
2.87
2.91
4.96
3.98
3.62
3.35
3.66
3.98
4.02
4.17
8.90
5.43
3.54
4.45
3.35
4.02
3.82

2.32
1.54
2.05
1.69
1.85
1.10
1.34
1.14
2.48
2.09
1.42
1.46
1.57
2.05
2.13
1.38
3.82
2.68
1.93
2.13
1.73
1.85
1.81

418

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.76
1.43
1.40
1.10
1.74
0.84
1.03
1.24
1.16
1.81
1.45
1.73
1.74
1.50
1.18
1.58
0.59
1.26
1.30
0.88
1.42
1.11
1.23

60
143
123
106
139
177
150
101
93
95
112
89
110
97
120
76
88
119
97
116
89
103
121

73
71
63
22
58
61
59
95
77
55
54
46
52
65
90
22
104
64
39
36
31
139
129

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
4
7
22
8
22
21
15
10
11
19
8
11
10
15
19
5
3
9
22
10
14
10
12

Roadbed
15
22
17
19
19
31
25
29
14
17
23
22
21
17
17
20
11
13
18
16
20
20
20

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998

8

12

18

24

36

60

14.88
17.76
16.77
19.37
24.29
17.83
16.26
14.13
24.33
26.38
14.21
19.80
18.35
23.46
22.17
18.58
23.03
30.63
19.21
16.50
26.30
15.59
12.95

9.96
12.48
11.50
13.58
16.73
12.17
9.96
10.16
18.27
20.94
9.53
14.84
13.27
15.47
16.42
13.07
14.57
21.54
14.02
11.38
18.27
10.94
8.86

7.56
9.65
9.21
10.63
12.44
9.76
7.68
8.43
14.61
17.95
7.48
12.01
10.55
11.34
12.91
10.55
10.43
16.89
11.42
8.86
14.21
8.39
6.81

6.02
7.40
7.52
8.03
8.11
7.44
6.22
6.73
12.09
15.98
6.14
9.45
8.27
7.80
10.28
9.06
7.36
13.31
9.21
6.93
10.31
6.50
5.08

4.65
5.59
6.06
5.83
5.31
5.51
4.84
5.24
9.80
13.66
4.84
7.28
6.50
5.24
8.15
7.44
5.24
10.31
6.89
5.55
7.36
5.16
3.78

2.99
3.31
4.02
3.31
2.24
3.19
3.11
3.54
6.77
10.75
3.11
4.53
4.21
2.60
5.43
5.39
2.76
6.18
3.90
3.82
3.82
3.50
2.24

1.42
1.50
1.85
1.54
0.67
1.26
1.42
1.93
3.94
6.89
1.69
2.05
2.24
1.02
2.80
3.15
1.14
2.32
1.54
2.05
1.69
1.85
1.10

419

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.95
1.21
1.56
1.03
1.19
0.66
1.68
0.75
1.44
1.06
1.70
0.90
0.88
1.12
1.51
1.39
1.68
1.76
1.43
1.40
1.10
1.74
0.84

111
127
97
140
105
114
76
195
120
120
128
149
145
89
116
103
72
60
143
123
106
139
177

112
62
180
38
23
86
205
69
36
63
106
58
46
29
46
96
43
73
71
63
22
58
61

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
16
12
11
12
7
9
14
22
15
17
22
9
16
9
12
21
10
4
7
22
8
22
21

Roadbed
24
23
19
22
37
27
25
19
9
5
22
17
16
29
13
12
27
15
22
17
19
19
31

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998

8

12

18

24

36

60

15.47
17.52
21.38
19.21
20.79
21.54
20.20
19.21
16.38
32.72
29.72
21.69
19.25
22.72
22.72
17.48
16.14
14.88
17.76
16.77
19.37
24.29
17.83

10.83
11.65
14.92
12.87
14.88
14.37
14.17
12.99
11.30
23.27
22.72
16.14
12.52
16.30
14.57
12.09
11.38
9.96
12.48
11.50
13.58
16.73
12.17

8.43
9.02
11.85
9.69
11.54
10.79
10.98
9.96
9.06
17.52
19.69
12.95
9.29
12.80
11.06
9.72
9.13
7.56
9.65
9.21
10.63
12.44
9.76

6.34
6.93
9.57
7.48
8.54
7.76
8.07
7.95
7.36
12.20
16.46
10.55
7.01
9.65
8.07
7.95
7.52
6.02
7.40
7.52
8.03
8.11
7.44

4.72
5.08
7.56
5.94
6.42
5.71
6.06
6.14
5.79
8.46
13.31
8.35
5.39
7.28
5.91
6.26
5.91
4.65
5.59
6.06
5.83
5.31
5.51

2.87
2.91
4.96
3.98
3.62
3.35
3.66
3.98
4.02
4.17
8.90
5.43
3.54
4.45
3.35
4.02
3.82
2.99
3.31
4.02
3.31
2.24
3.19

1.34
1.14
2.48
2.09
1.42
1.46
1.57
2.05
2.13
1.38
3.82
2.68
1.93
2.13
1.73
1.85
1.81
1.42
1.50
1.85
1.54
0.67
1.26

420

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.03
1.24
1.16
1.81
1.45
1.73
1.74
1.50
1.18
1.58
0.59
1.26
1.30
0.88
1.42
1.11
1.23
1.95
1.21
1.56
1.03
1.19
0.66

150
101
93
95
112
89
110
97
120
76
88
119
97
116
89
103
121
111
127
97
140
105
114

59
95
77
55
54
46
52
65
90
22
104
64
39
36
31
139
129
112
62
180
38
23
86

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
15
10
11
19
8
11
10
15
19
5
3
9
22
10
14
10
12
16
12
11
12
7
9

Roadbed
25
29
14
17
23
22
21
17
17
20
11
13
18
16
20
20
20
24
23
19
22
37
27

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-M120-CS61012-07-23-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-US131-CS54014-05-13-1998
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002
flex-G-M20-CS54041-04-09-2002

8

12

18

24

36

60

16.26
14.13
24.33
26.38
8.19
8.19
7.99
9.09
6.57
7.76
11.02
7.05
8.86
13.77
20.23
23.10
21.60
19.42
9.39
12.48
14.70
10.67
13.42

9.96
10.16
18.27
20.94
6.61
6.61
6.30
6.65
5.31
5.79
8.31
5.28
6.73
10.21
14.88
17.40
16.15
14.37
7.10
9.67
10.83
9.06
10.38

7.68
8.43
14.61
17.95
5.47
5.63
5.12
5.35
4.53
4.61
6.93
4.49
5.63
7.86
12.01
13.81
12.58
10.92
5.58
7.79
8.53
7.23
8.57

6.22
6.73
12.09
15.98
4.21
4.41
3.70
3.86
3.54
3.62
5.20
3.74
4.53
5.41
8.77
9.97
8.98
7.48
3.90
5.68
6.17
5.50
6.35

4.84
5.24
9.80
13.66
3.19
3.50
2.68
2.83
2.64
2.76
3.74
2.91
3.50
4.05
6.72
7.52
6.76
5.58
2.92
4.21
4.79
4.20
4.54

3.11
3.54
6.77
10.75
2.20
2.44
1.73
1.81
1.73
1.93
2.05
2.09
2.40
2.53
4.14
4.42
4.10
3.35
1.74
2.33
3.05
2.44
2.57

1.42
1.93
3.94
6.89
1.38
1.61
0.98
1.18
1.02
1.26
0.71
1.18
1.26
1.50
2.04
2.00
1.92
1.67
1.01
0.95
1.56
0.98
1.02

421

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.68
0.75
1.44
1.06
1.90
1.02
1.66
1.47
1.54
1.29
0.89
1.35
1.02
1.02
0.70
1.20
1.68
1.84
1.04
0.81
1.31
1.94
1.01

76
195
120
120
612
684
537
407
928
526
312
430
369
360
182
168
173
193
614
391
241
664
396

205
69
36
63
5
5
5
5
5
8
103
180
122
11
40
35
34
25
14
59
47
56
52

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
14
22
15
17
466
500
276
500
500
371
12
48
31
58
13
10
12
16
77
14
21
14
12

Roadbed
25
19
9
5
26
21
35
30
35
29
43
31
28
24
17
17
18
20
36
35
22
34
32

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-M37-CS62032-05-18-2000
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994

8

12

18

24

36

60

13.78
17.17
11.34
8.90
11.65
9.21
9.06
15.98
9.33
20.31
17.24
8.57
10.33
9.36
11.17
10.45
10.30
11.27
11.59
10.37
10.52
9.47
9.59

10.75
13.19
9.21
7.20
8.50
6.77
6.81
12.60
7.95
16.34
13.94
6.34
7.73
6.96
8.64
7.64
8.07
8.40
8.37
7.69
7.71
6.56
7.01

8.74
10.47
7.72
6.34
6.73
5.28
5.28
10.51
7.05
13.46
11.61
5.18
6.17
5.69
7.00
6.14
6.79
6.85
6.55
6.34
6.31
5.21
5.61

6.34
7.64
6.18
5.59
4.76
3.70
3.86
7.87
6.46
10.00
8.94
3.93
4.76
4.46
5.50
4.68
5.14
5.29
4.83
4.82
4.88
4.02
4.32

4.65
5.43
4.69
4.65
3.50
2.60
2.80
5.98
5.43
7.28
6.77
2.97
3.78
3.53
4.38
3.60
4.04
4.07
3.73
3.84
3.90
3.15
3.22

2.91
3.23
3.07
3.58
2.24
1.69
1.89
3.90
4.02
4.37
4.41
1.68
2.51
2.28
2.77
2.24
2.48
2.46
2.24
2.50
2.51
2.03
2.13

1.57
1.73
1.85
2.09
1.26
0.98
1.14
1.85
2.17
2.20
2.52
0.61
1.29
1.08
1.20
0.96
0.97
0.88
0.97
1.16
1.24
1.08
1.03

422

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.54
1.20
1.52
1.11
1.24
1.94
1.80
1.80
1.38
1.38
1.00
0.79
1.37
1.02
1.62
1.62
1.61
1.70
1.91
1.60
0.81
0.62
1.79

277
216
458
436
256
319
345
237
597
218
272
318
278
281
256
230
335
215
199
251
245
232
285

9
6
7
133
16
15
16
19
140
4
5
190
83
166
154
154
140
212
111
144
127
113
93

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
79
87
308
18
67
166
216
15
5
100
178
15
28
22
14
18
13
10
18
20
23
34
27

Roadbed
22
20
19
19
28
36
31
19
22
16
14
55
27
33
29
35
35
39
34
30
28
33
33

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(2)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)

8

12

18

24

36

60

10.71
9.91
9.57
9.68
10.93
9.53
10.36
10.69
9.99
9.62
10.60
9.47
9.02
9.35
10.49
8.35
9.19
11.02
10.28
10.13
11.07
11.44
10.24

7.90
7.60
6.99
6.70
8.20
6.77
8.00
8.06
7.57
7.27
7.54
7.39
6.75
7.09
7.66
6.18
6.84
8.52
7.52
7.94
8.25
8.26
7.60

6.32
6.21
5.57
5.34
6.65
5.35
6.44
6.47
5.97
5.80
6.10
5.81
5.13
5.57
6.07
5.05
5.59
6.90
6.03
6.69
6.73
6.46
6.26

4.76
4.50
4.27
4.03
5.03
4.01
4.97
5.04
4.88
4.54
4.75
4.56
4.07
4.01
4.52
3.84
4.38
5.43
4.60
5.06
5.20
4.77
4.76

3.74
3.56
3.40
3.05
3.99
3.11
3.90
3.98
4.01
3.56
3.79
3.36
3.16
3.16
3.47
2.90
3.47
4.32
3.54
3.98
4.00
3.69
3.79

2.38
2.22
2.20
1.92
2.47
1.95
2.50
2.59
2.67
2.48
2.35
2.35
2.03
2.11
2.20
1.64
2.24
2.73
2.20
2.45
2.42
2.22
2.47

1.11
1.08
1.10
0.96
1.17
0.98
1.19
1.29
1.55
1.30
1.29
1.42
1.10
1.16
1.07
0.59
1.06
1.19
0.94
0.96
0.87
0.96
1.15

423

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.69
1.79
1.39
0.50
1.18
0.89
1.50
1.25
1.88
1.79
1.41
1.82
2.00
1.97
1.44
0.81
1.06
1.63
1.66
1.65
1.67
1.94
1.58

244
351
254
239
268
255
308
270
295
313
238
433
312
355
250
315
278
253
227
331
214
197
249

116
56
119
100
96
94
92
96
79
82
91
6
64
18
83
188
165
154
154
138
213
111
142

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
21
25
27
30
20
30
21
23
38
36
30
220
37
56
25
15
22
14
18
13
10
18
20

Roadbed
32
31
31
36
29
35
29
27
24
28
28
26
32
30
32
55
33
29
35
35
39
34
30

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(3)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(4)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS54013-08-18-1994-(5)
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-US131-CS59012-06-25-1998
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994

8

12

18

24

36

60

10.39
9.46
10.33
9.62
9.48
10.77
10.29
10.58
9.73
9.17
9.23
9.15
10.37
9.99
9.62
9.02
9.35
10.49
8.66
8.90
9.09
10.52
12.23

7.62
6.92
7.62
7.02
6.57
8.09
7.95
7.98
7.37
6.93
7.21
6.94
7.57
7.57
7.27
6.75
7.09
7.66
6.65
6.77
6.85
8.18
9.66

6.24
5.54
6.10
5.60
5.23
6.56
6.40
6.41
5.81
5.53
5.66
5.45
6.01
5.97
5.80
5.13
5.57
6.07
5.55
5.59
5.87
6.45
7.74

4.82
4.26
4.59
4.29
3.95
4.96
4.94
4.99
4.75
4.33
4.44
3.92
4.47
4.88
4.54
4.07
4.01
4.52
4.49
4.49
4.25
4.55
5.64

3.85
3.18
3.61
3.42
2.99
3.93
3.88
3.94
3.90
3.39
3.28
3.09
3.43
4.01
3.56
3.16
3.16
3.47
3.46
3.43
3.35
3.41
4.38

2.48
2.10
2.30
2.21
1.88
2.43
2.49
2.56
2.60
2.37
2.29
2.06
2.18
2.67
2.48
2.03
2.11
2.20
2.24
2.20
2.20
2.02
2.83

1.23
1.01
1.07
1.11
0.94
1.15
1.18
1.28
1.51
1.24
1.39
1.13
1.06
1.55
1.30
1.10
1.16
1.07
1.38
1.30
1.30
0.97
1.41

424

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.83
1.79
1.73
1.37
0.56
1.18
1.51
1.22
1.86
1.81
1.82
1.99
1.47
1.88
1.78
1.99
1.99
1.40
1.62
1.35
1.24
0.91
1.27

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

242
282
240
252
236
266
304
268
295
312
434
354
249
296
312
313
353
251
534
493
428
1,863
1,511

125
89
115
115
98
92
88
90
80
82
6
19
85
75
78
62
21
76
5
5
6
77
80

Subbase
23
27
21
27
30
20
21
24
38
36
220
55
25
38
35
37
54
25
239
169
145
23
20

Roadbed
28
33
32
31
36
29
29
27
24
28
26
31
32
24
28
32
30
32
26
28
28
35
25

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS41122-8-23-1994
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995

8

12

18

24

36

60

11.51
11.53
9.80
9.19
11.30
12.53
9.72
18.94
11.56
12.20
13.39
13.83
13.92
14.17
13.84
13.64
10.43
12.00
10.80
8.86
8.94
10.92
9.42

9.30
8.38
6.78
6.92
8.74
9.82
7.07
11.62
8.91
9.23
9.78
10.38
10.41
10.47
9.88
9.95
7.99
8.93
8.28
6.72
7.20
8.60
7.72

7.40
6.46
5.11
5.30
6.93
7.87
5.38
7.71
7.18
7.18
7.20
8.02
7.98
7.87
7.26
7.48
6.19
6.80
6.24
5.39
5.94
6.94
6.53

5.31
4.72
3.63
3.64
4.99
5.71
3.70
4.71
5.30
5.20
4.81
5.64
5.52
5.39
4.95
5.18
4.25
4.77
4.31
4.01
4.57
5.03
5.10

4.05
3.59
2.69
2.70
3.80
4.35
2.78
3.40
4.10
3.92
3.49
4.21
4.11
3.95
3.56
3.86
2.96
3.55
3.13
3.04
3.67
3.82
3.97

2.51
2.19
1.67
1.62
2.43
2.65
1.69
2.14
2.59
2.37
2.09
2.59
2.48
2.24
2.08
2.41
1.55
2.31
1.85
1.83
2.31
2.29
2.46

1.24
1.00
0.91
0.83
1.20
1.18
0.88
1.28
1.32
1.03
1.06
1.23
1.24
0.94
0.92
1.21
0.68
1.22
0.91
0.88
1.14
1.06
1.14

425

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
1.32
1.23
0.61
0.91
1.19
1.19
0.76
1.43
0.37
1.46
1.17
1.29
0.93
1.80
1.86
1.20
0.40
1.12
1.20
0.30
0.72
0.70
1.07

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

2,096
643
976
1,901
1,488
1,264
1,348
441
1,464
898
1,062
977
1,123
778
661
888
2,313
1,308
1,750
1,709
2,330
1,960
3,000

66
112
83
76
82
91
79
25
87
101
52
71
60
77
75
64
63
63
66
135
154
93
142

Subbase
21
20
36
33
23
15
33
34
22
16
26
19
21
16
19
24
22
31
27
26
22
19
17

Roadbed
28
34
38
42
29
29
39
28
27
33
34
29
29
36
37
30
49
30
39
42
34
34
33

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995

8

12

18

24

36

60

10.10
12.90
12.26
13.72
13.86
13.61
13.16
13.92
14.20
14.32
14.43
14.24
13.96
12.95
12.55
11.83
12.91
13.57
12.72
11.11
11.72
10.98
9.30

7.76
10.49
9.02
9.27
9.31
9.15
8.87
9.01
9.66
9.75
10.08
9.62
9.87
8.77
9.17
9.21
10.43
10.36
9.42
8.27
9.05
8.55
7.19

6.25
8.60
6.97
6.55
6.58
6.51
6.36
6.33
6.90
6.81
7.22
6.81
7.30
6.27
6.97
7.30
8.42
8.17
7.38
6.48
7.27
6.95
5.83

4.40
6.51
5.07
4.48
4.40
4.36
4.28
4.31
4.66
4.55
4.94
4.74
5.12
4.26
4.87
5.21
6.05
5.95
5.32
4.63
5.34
5.09
4.34

3.22
5.02
3.86
3.32
3.27
3.22
3.15
3.24
3.59
3.40
3.72
3.65
3.81
3.15
3.56
3.92
4.53
4.56
4.06
3.47
4.07
3.86
3.31

1.83
2.95
2.40
2.14
2.03
1.92
1.94
2.04
2.32
2.17
2.32
2.40
2.27
1.92
2.11
2.33
2.80
2.79
2.55
2.12
2.52
2.36
1.99

0.78
1.31
1.16
1.12
1.01
0.91
0.97
1.02
1.20
1.17
1.17
1.25
1.00
0.92
1.10
1.13
1.34
1.32
1.28
1.08
1.27
1.18
0.99

426

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.80
0.61
1.01
1.41
1.85
1.89
1.42
1.91
1.89
1.39
1.78
1.97
1.99
1.83
0.46
0.72
1.30
0.84
0.64
0.28
0.27
0.19
0.48

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,914
2,226
752
587
502
473
568
380
534
634
578
453
514
503
1,259
1,802
2,067
1,045
977
1,408
1,691
2,148
2,223

99
84
98
57
63
72
67
68
59
49
62
64
86
76
60
73
63
85
84
82
82
81
109

Subbase
19
13
21
32
28
25
28
30
30
32
25
31
19
26
26
21
18
17
23
26
22
23
25

Roadbed
44
28
31
32
35
38
37
35
30
31
31
29
35
38
33
32
27
27
29
34
29
31
37

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS29021-5-23-1995
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994

8

12

18

24

36

60

9.35
11.89
12.16
11.85
10.98
13.15
13.47
14.09
14.39
14.30
13.49
13.17
12.12
11.86
12.26
13.06
10.52
12.23
11.51
9.67
9.57
11.53
9.79

7.10
8.34
9.06
9.19
8.24
10.33
10.54
11.19
11.37
11.09
10.58
10.53
9.57
9.33
9.86
10.14
8.18
9.66
9.30
7.70
7.63
8.38
6.72

5.47
6.24
7.09
7.40
6.40
8.26
8.33
9.03
9.25
8.89
8.45
8.60
7.35
7.39
8.02
8.15
6.45
7.74
7.40
5.91
5.87
6.46
5.08

3.83
4.21
5.06
5.35
4.48
5.97
6.01
6.70
6.85
6.48
6.22
6.32
5.21
5.37
5.85
5.81
4.55
5.64
5.31
3.94
4.02
4.72
3.60

2.88
3.12
3.81
3.97
3.29
4.45
4.53
5.18
5.30
5.00
4.74
4.79
3.79
3.97
4.33
4.30
3.41
4.38
4.05
2.87
2.98
3.59
2.69

1.79
1.90
2.27
2.23
1.97
2.55
2.66
3.15
3.16
2.99
2.84
2.78
2.23
2.21
2.25
2.30
2.02
2.83
2.51
1.81
1.86
2.19
1.68

0.92
1.02
1.08
1.04
0.99
1.04
1.11
1.34
1.40
1.29
1.24
1.18
1.05
0.94
0.85
0.91
0.97
1.41
1.24
1.09
1.11
1.00
0.92

427

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.92
0.50
0.55
0.61
0.37
0.88
1.32
1.19
0.66
1.13
0.95
0.56
1.24
0.62
0.74
0.55
0.91
1.27
1.33
1.34
1.19
1.24
0.57

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,907
1,051
1,095
2,162
1,674
1,396
1,070
1,111
1,282
975
1,215
1,781
1,797
1,886
2,753
1,648
1,858
1,509
2,092
3,211
3,283
644
897

82
61
87
68
70
89
95
101
88
95
93
85
63
82
67
78
78
80
67
17
21
112
86

Subbase
34
32
20
19
27
13
13
12
12
13
14
13
21
16
12
13
23
20
21
92
69
20
37

Roadbed
39
36
33
34
36
34
32
27
26
28
29
30
33
37
39
37
35
25
28
32
32
34
38

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(2)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)

8

12

18

24

36

60

10.99
10.04
10.21
11.84
11.12
9.50
9.71
11.33
9.68
9.00
9.55
10.17
10.31
10.52
14.05
9.80
9.57
11.95
10.15
10.71
9.82
10.44
10.59

8.06
6.90
7.93
9.35
8.99
7.56
7.97
8.23
6.65
6.86
7.10
7.00
8.31
8.31
10.90
6.98
7.24
8.28
8.04
8.42
7.83
8.01
7.58

6.03
5.11
6.26
7.49
7.16
5.81
6.32
6.35
5.02
5.23
5.44
5.22
6.79
6.74
8.74
5.21
5.69
5.82
6.17
6.76
6.26
6.18
5.78

4.29
3.57
4.41
5.46
5.13
3.87
4.59
4.64
3.56
3.54
3.79
3.55
5.11
4.88
6.46
3.55
4.00
4.10
4.67
5.13
4.57
4.23
3.86

3.32
2.69
3.30
4.24
3.92
2.82
3.50
3.53
2.66
2.62
2.84
2.71
4.03
3.66
4.97
2.66
2.97
3.20
3.77
3.87
3.44
3.10
2.77

2.35
1.77
1.96
2.73
2.43
1.78
2.36
2.15
1.66
1.58
1.73
1.73
2.68
2.16
3.06
1.66
1.77
2.26
2.47
2.33
2.14
1.82
1.60

1.50
1.12
0.94
1.36
1.20
1.07
1.46
0.98
0.91
0.79
0.88
0.94
1.44
1.02
1.27
0.86
0.91
1.32
1.50
1.13
1.08
0.91
0.84

428

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.92
1.83
0.92
1.24
1.34
1.35
0.95
1.25
0.54
1.34
0.78
0.70
0.68
0.39
1.55
0.94
0.38
1.38
1.90
0.62
0.77
0.92
0.57

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

1,758
1,431
1,857
1,519
2,096
3,203
3,814
575
892
2,021
1,550
937
2,374
2,361
753
1,105
2,022
818
2,160
2,014
2,500
1,918
1,536

30
45
78
79
66
17
18
116
86
74
84
73
84
77
107
79
73
49
61
92
77
60
56

Subbase
78
62
22
20
21
90
98
19
37
33
31
40
28
20
11
35
29
52
43
20
26
27
31

Roadbed
24
33
35
25
28
32
24
34
38
44
40
37
25
34
27
40
38
27
24
31
33
37
41

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(3)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-G-M57-CS59021-08-23-1994-(4)
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS1052-06-03-2008
flex-N-US23-CS71073-06-04-2008-(2)

8

12

18

24

36

60

13.15
10.39
11.26
11.89
8.61
9.13
9.96
10.21
13.73
9.56
9.32
10.46
8.07
8.68
10.86
10.32
9.15
9.92
12.75
10.17
12.92
9.51
6.30

10.08
7.55
8.90
8.95
6.57
6.78
6.85
8.06
10.65
6.80
7.08
8.27
5.95
6.15
7.63
8.11
7.57
7.62
9.77
7.39
9.73
6.71
5.02

7.90
5.73
7.05
6.91
5.01
5.20
5.11
6.54
8.54
5.08
5.70
6.65
4.63
4.49
5.75
6.52
6.20
5.83
7.66
5.61
8.03
5.35
4.21

5.75
4.11
5.21
5.03
3.39
3.62
3.48
4.74
6.31
3.46
4.09
4.74
3.19
3.15
3.90
4.94
4.45
4.18
5.58
4.02
6.19
3.95
3.22

4.34
3.10
4.01
3.91
2.51
2.71
2.65
3.55
4.85
2.60
2.96
3.72
2.44
2.39
2.99
3.73
3.70
3.22
4.21
3.04
4.75
2.99
2.38

2.56
1.97
2.68
2.56
1.51
1.65
1.69
2.10
2.99
1.61
1.84
2.59
1.62
1.50
1.95
2.25
2.48
2.18
2.48
1.93
2.91
1.88
1.23

1.02
1.06
1.49
1.41
0.76
0.84
0.92
0.99
1.24
0.84
1.12
1.67
1.05
0.92
1.26
1.09
1.54
1.39
0.99
1.04
1.27
0.93
0.33

429

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
1.60
0.56
0.79
0.72
1.27
0.76
0.67
0.37
1.53
0.90
1.14
1.23
3.66
2.03
1.97
0.63
1.98
1.14
1.57
0.54
0.79
1.20
0.55

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
200
200
300

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

827
1,136
2,025
1,226
2,039
1,557
941
2,384
755
1,110
3,852
3,122
3,121
1,638
1,712
2,011
4,077
2,658
830
1,139
729
888
1,339

105
80
57
66
72
84
73
76
106
79
18
19
28
58
30
92
27
25
105
79
88
81
96

Subbase
12
33
31
30
34
31
40
20
11
35
90
100
100
57
69
20
75
87
12
33
18
41
14

Roadbed
33
33
24
25
44
40
37
34
27
40
31
21
34
39
28
31
23
25
33
33
18
25
83

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-Su-I75-CS49025-05-22-2008
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)

8

12

18

24

36

60

8.44
15.96
14.90
20.56
16.23
19.26
16.84
11.13
13.29
17.44
13.80
10.70
11.64
16.66
11.78
9.49
11.04
10.90
14.43
11.41
16.43
11.93
14.81

6.01
11.73
11.13
14.02
11.37
13.06
11.09
7.77
9.15
11.77
10.60
7.69
8.32
12.33
8.26
6.97
7.72
7.75
10.61
8.16
12.43
8.07
10.95

5.27
8.85
8.48
9.79
8.18
9.03
7.84
5.83
6.72
8.16
8.34
5.81
6.16
9.63
6.20
5.25
5.55
5.67
8.25
5.99
9.71
5.75
8.57

4.27
5.98
5.84
5.82
5.14
5.52
4.65
3.90
4.42
4.92
6.52
3.89
4.39
6.93
4.21
3.37
3.77
3.80
5.94
3.87
6.94
3.72
6.75

3.39
4.28
4.16
4.09
3.72
3.77
3.10
2.91
3.20
3.38
5.38
2.80
3.41
5.21
3.08
2.32
2.79
2.83
4.64
2.77
5.27
2.71
5.65

2.16
2.40
2.37
2.65
2.25
2.08
1.89
1.86
2.05
2.01
4.29
1.74
2.45
2.99
2.03
1.35
1.78
1.83
2.97
1.60
3.05
1.81
4.56

0.97
1.13
1.11
1.67
1.27
1.16
1.19
1.13
1.26
1.21
3.13
1.09
1.67
1.28
1.25
0.80
1.08
1.13
1.54
0.83
1.27
1.18
3.32

430

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.87
1.40
1.39
1.56
1.70
1.59
0.81
0.94
0.78
1.38
0.94
0.77
1.32
1.33
0.41
0.86
1.43
1.30
1.39
1.65
1.92
1.31
0.97

344
276
310
196
248
189
271
407
336
227
448
534
425
216
407
611
377
411
256
344
220
345
333

107
33
36
7
16
14
9
21
15
11
12
12
14
60
16
13
23
17
49
31
61
13
14

150
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
32
18
18
78
36
26
93
68
71
50
259
134
201
12
83
106
66
85
22
33
11
144
195

Roadbed
20
30
30
22
28
30
33
32
29
30
11
34
22
26
29
45
34
31
22
40
25
30
10

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)
flex-B-M57-CS29022-08-30-1994-(2)

8

12

18

24

36

60

17.29
18.55
16.13
14.27
16.09
14.61
18.81
17.89
16.56
20.44
16.76
17.91
18.72
17.22
21.28
22.29
21.13
16.92
15.70
22.67
18.43
16.86
22.50

12.17
12.44
10.33
9.75
11.19
10.08
12.97
13.00
11.38
14.82
11.91
10.56
11.78
11.78
14.71
15.30
14.36
11.23
10.50
15.85
12.47
11.87
18.62

9.04
8.53
7.11
6.90
8.15
7.01
8.92
9.85
8.47
11.09
8.99
6.74
7.96
8.13
10.70
11.37
10.21
7.98
7.31
11.50
8.85
8.82
15.80

6.05
5.13
4.36
4.38
5.20
4.37
5.40
6.89
5.85
7.63
6.34
3.77
4.75
5.11
7.12
7.62
6.90
5.29
4.60
7.45
5.72
5.87
13.31

4.41
3.59
3.16
3.21
3.67
3.06
3.73
5.11
4.34
5.58
4.85
2.53
3.28
3.54
5.20
5.62
5.04
3.81
3.35
5.05
4.04
4.14
11.39

2.59
2.21
2.02
2.15
2.24
1.81
2.12
3.00
2.72
3.37
3.23
1.77
2.04
2.03
3.19
3.42
3.08
2.34
2.08
2.56
2.34
2.31
8.81

1.37
1.36
1.25
1.36
1.35
1.09
1.19
1.37
1.41
1.73
1.79
1.18
1.21
1.19
1.65
1.80
1.64
1.26
1.16
1.11
1.20
1.02
5.52

431

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.07
1.67
1.46
1.26
0.88
1.67
1.95
1.77
1.26
1.32
1.18
1.29
1.02
1.68
1.68
1.12
1.51
1.17
1.77
1.51
1.49
1.94
0.94

215
199
197
275
275
271
192
185
180
190
213
162
159
219
149
144
138
170
194
150
165
185
265

25
9
14
12
11
13
13
43
36
23
28
9
13
13
23
22
23
27
21
24
24
40
46

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
21
55
57
98
52
51
29
14
22
16
27
145
41
34
18
17
19
26
34
11
20
15
20

Roadbed
24
26
28
26
26
32
28
23
24
19
19
31
28
29
20
19
20
27
29
27
27
31
6

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)

8

12

18

24

36

60

11.44
15.03
11.99
17.12
12.54
15.32
18.02
19.23
16.72
14.92
16.65
15.10
19.36
17.21
18.43
16.85
20.97
18.42
19.20
17.60
21.62
22.87
21.47

8.13
11.06
8.58
12.96
8.49
11.33
12.68
12.91
10.71
10.19
11.57
10.41
13.35
11.81
13.39
11.58
15.21
10.86
12.08
12.03
14.95
15.70
14.59

5.95
8.59
6.30
10.12
6.04
8.87
9.42
8.85
7.37
7.22
8.43
7.25
9.18
8.49
10.15
8.62
11.38
6.93
8.16
8.31
10.87
11.66
10.38

3.98
6.19
4.06
7.23
3.91
6.99
6.31
5.32
4.52
4.58
5.38
4.52
5.56
5.68
7.10
5.96
7.83
3.87
4.86
5.22
7.24
7.82
7.01

2.98
4.83
2.90
5.49
2.85
5.84
4.60
3.72
3.28
3.35
3.79
3.17
3.83
4.13
5.27
4.42
5.72
2.60
3.37
3.62
5.29
5.76
5.12

1.92
3.09
1.68
3.18
1.90
4.72
2.70
2.29
2.10
2.25
2.31
1.87
2.18
2.53
3.09
2.77
3.46
1.82
2.09
2.08
3.24
3.51
3.13

1.19
1.61
0.87
1.33
1.24
3.44
1.43
1.41
1.30
1.42
1.39
1.12
1.23
1.27
1.42
1.44
1.78
1.21
1.24
1.22
1.67
1.85
1.67

432

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.33
1.41
1.66
1.89
1.27
0.97
1.06
1.66
1.48
1.24
0.89
1.67
1.94
1.97
1.76
1.23
1.32
1.30
1.06
1.70
1.66
1.12
1.50

411
256
344
221
345
333
215
199
197
275
275
272
192
176
186
180
190
162
159
219
149
144
139

17
49
31
61
13
14
25
9
14
12
11
13
13
32
43
36
23
9
13
13
23
22
23

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
85
22
32
11
145
195
21
55
58
96
52
51
29
22
14
22
16
145
41
35
18
17
19

Roadbed
31
22
40
25
30
10
24
26
28
26
26
32
28
26
23
24
19
31
28
29
20
19
20

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(3)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-08-30-1994-(4)

8

12

18

24

36

60

17.24
16.07
23.09
18.87
17.27
23.22
15.15
14.18
19.87
19.89
15.57
18.51
15.08
10.70
12.78
16.79
13.27
11.47
10.29
11.24
16.21
11.34
9.13

11.44
10.75
16.15
12.77
12.17
19.22
11.13
10.59
13.55
14.89
10.90
12.55
9.93
7.47
8.80
11.34
10.19
8.09
7.40
8.03
12.00
7.96
6.70

8.13
7.48
11.72
9.07
9.04
16.30
8.39
8.07
9.47
11.37
7.84
8.68
7.01
5.61
6.47
7.86
8.02
5.95
5.59
5.94
9.38
5.97
5.05

5.39
4.71
7.59
5.86
6.02
13.73
5.68
5.55
5.63
7.89
4.93
5.30
4.16
3.75
4.25
4.74
6.27
4.11
3.74
4.24
6.75
4.06
3.24

3.88
3.43
5.14
4.13
4.24
11.76
4.06
3.96
3.96
5.85
3.56
3.62
2.78
2.80
3.08
3.25
5.17
3.06
2.69
3.29
5.07
2.96
2.23

2.38
2.13
2.61
2.39
2.37
9.09
2.28
2.26
2.56
3.46
2.16
2.00
1.69
1.79
1.97
1.94
4.13
1.98
1.68
2.37
2.91
1.96
1.30

1.28
1.18
1.13
1.23
1.04
5.69
1.07
1.06
1.61
1.70
1.22
1.12
1.07
1.08
1.21
1.17
3.01
1.18
1.05
1.61
1.24
1.20
0.77

433

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.17
1.77
1.50
1.49
1.95
0.94
1.43
1.40
1.57
1.49
1.69
1.59
0.83
0.96
0.80
1.40
0.94
1.03
0.79
1.33
1.32
0.44
0.87

169
194
151
165
185
264
272
310
196
219
249
190
269
408
336
227
447
361
536
426
216
408
609

27
21
24
24
40
46
33
36
7
26
16
14
9
21
15
11
12
23
12
14
60
16
13

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
26
34
11
20
15
20
18
18
78
14
36
26
95
68
70
50
260
56
137
204
12
83
106

Roadbed
27
29
27
27
30
6
30
30
22
19
28
30
33
32
29
29
11
30
34
22
26
29
45

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-08-30-1994-(4)
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993

8

12

18

24

36

60

10.68
12.50
11.44
11.49
15.03
9.81
10.84
17.12
13.04
12.54
12.95
15.32
19.23
16.72
14.92
19.94
15.94
17.83
16.65
15.10
19.36
17.21
18.43

7.47
9.03
8.13
8.25
11.06
7.18
7.75
12.96
9.80
8.49
8.72
11.33
12.91
10.71
10.19
14.19
11.45
12.50
11.57
10.41
13.35
11.81
13.39

5.37
6.62
5.95
6.05
8.59
5.37
5.85
10.12
7.43
6.04
6.25
8.87
8.85
7.37
7.22
10.46
8.38
9.28
8.43
7.25
9.18
8.49
10.15

3.65
4.44
3.98
4.04
6.19
3.55
4.09
7.23
5.28
3.91
4.20
6.99
5.32
4.52
4.58
6.64
5.64
6.02
5.38
4.52
5.56
5.68
7.10

2.70
3.19
2.98
2.98
4.83
2.57
3.06
5.49
4.06
2.85
3.13
5.84
3.72
3.28
3.35
4.68
4.22
4.27
3.79
3.17
3.83
4.13
5.27

1.72
1.99
1.92
1.90
3.09
1.51
2.05
3.18
2.69
1.90
2.08
4.72
2.29
2.10
2.25
2.73
2.74
2.50
2.31
1.87
2.18
2.53
3.09

1.04
1.15
1.19
1.13
1.61
0.90
1.25
1.33
1.69
1.24
1.26
3.44
1.41
1.30
1.42
1.51
1.64
1.43
1.39
1.12
1.23
1.27
1.42

434

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

1.40
1.10
1.33
1.20
1.41
1.31
0.57
1.89
1.28
1.27
0.99
0.97
1.66
1.48
1.24
1.27
1.29
0.88
0.89
1.67
1.94
1.97
1.76

375
385
411
406
256
571
446
221
447
345
283
333
199
197
275
224
283
258
275
272
192
176
186

23
18
17
19
49
16
21
61
13
13
22
14
9
14
12
12
14
13
11
13
13
32
43

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
66
51
85
65
22
81
77
11
84
145
62
195
55
58
96
25
49
31
52
51
29
22
14

Roadbed
34
31
31
32
22
40
29
25
22
30
29
10
26
28
26
23
22
25
26
32
28
26
23

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993

8

12

18

24

36

60

20.41
18.42
19.20
17.60
16.07
23.09
22.22
17.98
17.27
15.96
19.95
20.56
16.23
19.26
16.84
11.13
13.29
17.44
13.80
10.70
11.64
16.66
11.78

12.96
10.86
12.08
12.03
10.75
16.15
14.21
11.52
12.17
11.73
14.23
14.02
11.37
13.06
11.09
7.77
9.15
11.77
10.60
7.69
8.32
12.33
8.26

8.86
6.93
8.16
8.31
7.48
11.72
9.98
8.25
9.04
8.85
10.17
9.79
8.18
9.03
7.84
5.83
6.72
8.16
8.34
5.81
6.16
9.63
6.20

5.42
3.87
4.86
5.22
4.71
7.59
6.22
5.48
6.02
5.98
6.24
5.82
5.14
5.52
4.65
3.90
4.42
4.92
6.52
3.89
4.39
6.93
4.21

3.74
2.60
3.37
3.62
3.43
5.14
4.35
4.05
4.24
4.28
4.18
4.09
3.72
3.77
3.10
2.91
3.20
3.38
5.38
2.80
3.41
5.21
3.08

2.27
1.82
2.09
2.08
2.13
2.61
2.70
2.72
2.37
2.40
2.21
2.65
2.25
2.08
1.89
1.86
2.05
2.01
4.29
1.74
2.45
2.99
2.03

1.28
1.21
1.24
1.22
1.18
1.13
1.54
1.61
1.04
1.13
1.13
1.67
1.27
1.16
1.19
1.13
1.26
1.21
3.13
1.09
1.67
1.28
1.25

435

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.95
1.30
1.06
1.70
1.77
1.50
0.59
0.38
1.95
1.40
1.81
1.56
1.70
1.59
0.81
0.94
0.78
1.38
0.94
0.77
1.32
1.33
0.41

144
162
159
219
194
151
138
167
185
273
208
196
248
189
271
407
336
227
448
534
425
216
407

16
9
13
13
21
24
14
19
40
33
15
7
16
14
9
21
15
11
12
12
14
60
16

700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
29
145
41
35
34
11
27
40
15
18
19
78
36
26
93
68
71
50
259
134
201
12
83

Roadbed
27
31
28
29
29
27
22
22
30
30
29
22
28
30
33
32
29
30
11
34
22
26
29

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M57-CS29022-01-28-1993
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2005
flex-B-M84-CS9011-05-17-2006
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)

8

12

18

24

36

60

9.49
11.04
23.22
12.44
13.70
13.70
13.32
16.76
16.50
15.28
13.32

6.97
7.72
19.22
9.07
10.03
10.67
9.69
13.08
12.27
11.37
9.85

5.25
5.55
16.30
7.25
7.98
8.95
7.85
11.02
10.03
9.58
7.95

3.37
3.77
13.73
4.87
5.31
6.65
5.58
8.39
7.39
7.37
5.62

2.32
2.79
11.76
3.40
3.75
5.08
4.09
6.54
5.70
5.82
4.16

1.35
1.78
9.09
1.72
1.97
2.95
2.35
4.05
3.62
3.74
2.48

0.80
1.08
5.69
0.63
0.76
1.14
1.02
1.88
1.69
1.81
1.41

11.09
18.50
12.15
12.90
15.12
17.62
14.46
14.62
15.37
14.92
15.63

7.90
14.11
8.97
9.74
11.82
13.99
11.13
11.26
11.59
11.48
12.11

6.23
11.57
7.14
7.85
9.85
11.92
9.21
9.32
9.24
9.49
10.33

4.13
8.32
4.64
5.39
7.13
9.02
6.57
6.55
6.23
6.85
7.87

2.86
6.22
3.06
3.74
5.24
6.93
4.73
4.65
4.48
5.11
6.09

1.60
3.66
1.45
1.93
2.96
4.24
2.56
2.40
2.71
3.14
3.74

0.91
1.57
0.54
0.74
1.11
1.77
0.94
0.86
1.54
1.46
1.77

436

Depth
RMS
to Stiff
Error
Layer
(%)
(in)
0.86
1.43
0.94
0.77
1.00
0.53
0.55
0.39
0.71
0.47
1.66
1.11
1.57
0.77
0.99
0.65
0.89
0.67
0.70
0.66
0.56
0.86
0.73

700
700
700
300
300
300
300
300
300
300
300
300
400
400
400
400
400
400
400
400
400
400
400

3 - Layer Backcalculated
resilient modulus (ksi)
AC

Base

611
377
264
630
556
607
502
568
355
308
1,112
1,067
1,194
435
847
793
675
561
703
809
936
675
636

13
23
46
62
55
93
69
64
67
98
12
33
14
54
44
54
68
74
64
52
9
53
70

Subbase
106
66
20
16
15
11
17
13
16
17
59
38
64
11
17
14
10
9
11
11
53
16
13

Roadbed
45
34
6
38
32
23
26
15
16
15
20
15
33
18
47
36
26
17
29
31
20
20
17

Table B.2 (Cont'd)

File Title

Deflection (in mills) at the Specified Distance
(in inch) from the Center of the Loaded Area
0

flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-05-17-2005-(2)
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-B-M84-CS9011-10-03-2005
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-U-M52-CS33051-11-13-2002
flex-Su-M38-CS66042-05-20-2008
flex-Su-US141-CS7022-05-19-2008

8

12

18

24

36

60

14.86
12.86
13.47
15.16
14.77
11.14
14.15
14.50
14.44
15.35
15.27
14.41
12.06
17.17
11.39
12.04
10.67
11.77
19.91

11.38
9.44
10.16
11.58
10.58
8.26
9.38
9.77
9.80
10.68
10.23
10.20
8.13
11.92
9.30
9.34
8.78
8.07
15.46

9.69
7.80
8.53
9.81
8.58
7.00
6.73
6.93
7.04
7.79
7.52
7.68
5.96
8.92
7.75
7.48
7.44
6.34
12.36

7.51
5.79
6.47
7.52
6.03
5.34
4.46
4.40
4.64
5.21
5.23
5.51
4.11
6.28
5.76
5.42
5.67
4.57
8.87

5.95
4.50
5.09
5.94
4.41
4.16
3.31
3.13
3.31
3.90
3.90
4.26
3.13
4.76
4.32
4.02
4.04
3.41
6.80

3.85
2.91
3.30
3.85
2.52
2.69
2.15
1.83
1.96
2.50
2.31
2.71
1.94
2.80
2.40
2.24
2.29
2.06
4.30

1.94
1.50
1.73
1.97
1.22
1.34
1.17
0.92
0.99
1.31
0.96
1.25
0.88
1.11
1.14
1.14
1.06
1.08
2.14

437

Depth
RMS
to Stiff
Error
Layer
(%)
(in)

AC

Base

0.58
0.55
0.66
0.59
1.10
0.73
1.61
1.44
1.55
1.04
1.22
0.99
1.05
1.73
0.55
1.10
1.31
1.36
1.26

466
472
552
499
530
470
480
484
500
486
218
330
333
200
856
599
951
613
377

91
80
78
78
49
125
20
22
23
20
60
54
60
62
6
10
6
73
34

400
400
400
400
400
400
200
200
200
200
200
200
200
200
250
250
250
350
700

3 - Layer Backcalculated
resilient modulus (ksi)
Subbase
16
23
21
17
18
22
66
43
42
49
23
28
36
17
369
127
500
30
13

Roadbed
16
21
18
16
24
23
20
24
23
17
22
18
25
19
23
23
24
29
16

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438

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