LTPP Data Analysis Plan

The LTPP Data Analysis Plan allows easy access to past research reports and projects. List view of this feature also allows users to view and prioritize research reports on the basis of different attributes and selection criteria. And Pivot view lets the user find research project that is completed, in progress, or planned using LTPP data. For this pivot chart is used to sort research projects based on user selected criteria.

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LTPP Data Analysis Plan

The LTPP Data Analysis Plan allows easy access to proposed and active research projects, and projects that have been completed along with their final reports. The List View allows users to view and order research reports based on different attributes and selection criteria. The Pivot View allows users to find research projects based on selected criteria. Since 1999, the analysis of the LTPP data has been guided by the “Strategic Plan for Long-Term Pavement Performance Data Analysis.” The plan sets forth seven strategic objectives supporting the goal to develop knowledge, performance relationships, and models to facilitate improved pavement design and reliable predictions. Each strategic objective, in turn, is supported by several focused "product objectives," which are color-coded to represent criticality and numbered to indicate sequencing for completion. In 2010, a LTPP Pavement Analysis Forum was held to review and refine targeted analytical outcomes under the strategic plan. During the pavement analysis forum, the 2010 Strategic Plan was expanded to include two new strategic objectives. Formerly known as the Strategic Plan for LTPP Data Analysis with 9 objectives, the newly formed LTPP Data Analysis Plan now has 5 objectives with revised analytical outcomes and newly proposed analysis projects as a result of the 2020 LTPP Pavement Data Analysis Workshop. The LTPP program is implementing this plan and it can be viewed below.

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Objective 1: Characterize loading, environment, and materials and impact on pavement performance

Characterization and impact of traffic loading on pavement performance. A
Very High 1

FHWA LTPP-PROJ-0000014 Estimating Cumulative Traffic Loads, Phase 1
10/15/1998 to 9/30/2001	$250000 Status: Completed 1A1

FHWA LTPP-PROJ-0000015 Estimating Cumulative Traffic Loads, Phase 2
10/31/1999 to 12/20/2002	$293000 Status: Completed 1A2

NCHRP LTPP-PROJ-0000203 NCHRP 1-39: Traffic Data Collection, Analysis, and Forecasting for Mechanistic Pavement Design
8/30/2000 to 7/30/2004	$500000 Status: Completed 1A3

FHWA LTPP-PROJ-0000010 Optimization of Traffic Data Collection for Specific Pavement Applications
1/23/2003 to 8/15/2005	$266058 Status: Completed 1A4

FHWA LTPP-PROJ-0000002 Long-Term Pavement Performance Weigh-in-Motion Approach Smoothness Specifications
12/31/1999 to 11/1/2005	$0 Status: Completed 1A5

FHWA FHWA-PROJ-09-0045 Development of New Default Traffic Datasets for the Mechanistic-Empirical Pavement Design Guide Using the Data from Long-Term Pavement Performance Specific Pavement Study Traffic Data Collection Pooled Fund Study, TPF-5(004)
9/30/2009 to 5/30/2012	$258409 Status: Completed 1A6

FHWA LTPP-PROJ-0000204 Refinement of Pavement Smoothness Requirements for WIM Systems
10/1/2009 to 8/1/2012	$0 Status: Completed 1A7

FHWA FHWA-PROJ-09-0046 Verification, Refinement, and Applicability of Long-Term Pavement Performance (LTPP) Classification Scheme
9/30/2009 to 12/31/2012	$249977 Status: Completed 1A8

FHWA LTPP-PROJ-0000016 Predicting Truck and Axle Loading Patterns
7/21/2014 to 9/1/2017	$193919 Status: Completed 1A9

FHWA LTPP-PROJ-0000013 Guidance to Facilitate the Analysts' Use of the LTPP Traffic Data, Including Estimating Traffic Loads
7/21/2014 to 12/31/2017	$412210.35 Status: Completed 1A10

NCHRP LTPP-PROJ-0000004 NCHRP 20-50(20): LTPP Data Analysis: Develop Practical Tools and Procedures to Improve WIM Data Quality
10/1/2018 to 4/30/2023	$350000 Status: Completed 1A11

FHWA LTPP-PROJ-0000011 Effect of Traffic Data Input Levels on Mechanistic-Empirical Pavement Design Guide Outputs
9/17/2019 to 12/16/2021	$500000 Status: Completed 1A12

Problem Statement Number LTPP-PROJ-0000209 Develop Traffic Loading Estimates for Pavement Analysis Using Truck Volumes from Non-Traditional Data Sources
1/1/2021 to 12/31/2022	$100000 Status: Planned 1A13

Problem Statement Number LTPP-PROJ-0000210 Determine Loading Trends for Use in Pavement Load Forecasting
1/1/2021 to 12/31/2022	$100000 Status: Planned 1A14

Problem Statement Number LTPP-PROJ-0000067 Application of the Long-Term Pavement Performance Data to Validate Theoretical Analysis of the Relative Impacts of the Environment and Traffic on Pavement Response and Subsequent Performance
$200000 Status: Proposed 1A15

Problem Statement Number LTPP-PROJ-0000200 Time- and Load-Dependent Portland Cement Concrete Material Properties
$400000 Status: Proposed 1A16

Problem Statement Number LTPP-PROJ-0000012 Evaluation of Lane and Directional Changes of Traffic Loading Over Time
$150000 Status: Proposed 1A17

Problem Statement Number LTPP-PROJ-0000005 Validate Vehicle Simulation Model and Provide Recommendations for Improved Weigh-in-Motion Site Selection and Calibration
$750000 Status: Proposed 1A18

Problem Statement Number LTPP-PROJ-0000006 Truck Tire Wander, Pressure, and Width Data Collection
$150000 Status: Proposed 1A19

Problem Statement Number LTPP-PROJ-0000007 Adding Axle Groupings Beyond Quad Tire Groups to Long-Term Pavement Performance Database
$30000 Status: Proposed 1A20

Problem Statement Number LTPP-PROJ-0000008 Collecting Data From Static Scales
$75000 Status: Proposed 1A20

Problem Statement Number LTPP-PROJ-0000009 Innovative Cost-Effective Alternatives to Traditional Weigh-in-Motion Calibration
$200000 Status: Proposed 1A21

Characterization and impact of environmental effects on pavement layer characteristics and pavement performance. B
Very High 1

FHWA LTPP-PROJ-0000057 Determination of Frost Penetration in Long-Term Pavement Performance Sections
8/1/1997 to 7/1/1998	$98922 Status: Completed 1B1

FHWA LTPP-PROJ-0000045 Analysis of Time Domain Reflectometry Data
8/1/1997 to 7/1/1998	$103056 Status: Completed 1B2

FHWA LTPP-PROJ-0000032 Backcalculation of Layer Parameters for Long-Term Pavement Performance Test Sections, Volume I
8/7/1997 to 7/31/1998	$125000 Status: Completed 1B3

FHWA LTPP-PROJ-0000044 Study of Long-Term Pavement Performance Pavement Temperatures
10/1/1998 to 11/1/1999	$94000 Status: Completed 1B4

FHWA LTPP-PROJ-0000047 Seasonal Variations in the Moduli of Unbound Pavement Layers
5/1/1997 to 3/31/2000	$0 Status: Completed 1B5

FHWA LTPP-PROJ-0000065 Verification of Long-Term Pavement Performance Virtual Weather Stations Phase I Report: Accuracy and Reliability of Virtual Weather Stations
1/1/2000 to 10/1/2000	$135000 Status: Completed 1B6

FHWA LTPP-PROJ-0000033 Backcalculation of Layer Parameters for Long-Term Pavement Performance Test Sections, Volume II
5/1/1997 to 8/31/2001	$171000 Status: Completed 1B7

NCHRP LTPP-PROJ-0000043 NCHRP 20-50(7/12): LTPP Data Analysis: Daily and Seasonal Variations in In Situ Material Properties
2/7/2000 to 8/31/2003	$349969 Status: Completed 1B8

NCHRP LTPP-PROJ-0000056 NCHRP 10-66: Predicting Inservice Performance of Flexible Pavements from Accelerated Pavement Testing
3/4/2004 to 10/31/2005	$100000 Status: Completed 1B9

FHWA LTPP-PROJ-0000059 Effect of Multiple Freeze Cycles and Deep Frost Penetration on Pavement Performance and Cost
3/4/2003 to 6/4/2006	$369683 Status: Completed 1B10

NCHRP LTPP-PROJ-0000048 NCHRP 1-40: Facilitating the Implementation of the Guide for the Design of New and Rehabilitated Pavement Structures
7/1/2004 to 12/31/2006	$650000 Status: Completed 1B11

NCHRP LTPP-PROJ-0000042 NCHRP 9-23: Environmental Effects in Pavement Mix and Structural Design Systems
2/27/2001 to 12/31/2007	$487234 Status: Completed 1B12

FHWA LTPP-PROJ-0000062 Evaluation of the Integrated Climatic Model Using Long-Term Pavement Performance Seasonal Monitoring Program Data
2/27/2001 to 12/31/2007	$0 Status: Completed 1B13

FHWA LTPP-PROJ-0000046 Long-Term Pavement Performance Computed Parameter: Moisture Content
7/1/2005 to 12/31/2007	$265477 Status: Completed 1B14

FHWA LTPP-PROJ-0000058 Long-Term Pavement Performance Computed Parameter: Frost Penetration
7/1/2005 to 6/30/2008	$199819 Status: Completed 1B15

FHWA FHWA-PROJ-11-0110 Evaluation of Long-Term Pavement Performance Program Climatic Data for Use in Mechanistic-Empirical Pavement Design Guide Calibration and Other Pavement Analyses
5/18/2011 to 12/30/2015	$360538 Status: Completed 1B16

FHWA FHWA-PROJ-14-0131 Incorporating a Curling Factor in Layer Moduli Backcalculation Using Long-Term Pavement Performance's Seasonal Monitoring Program Falling Weight Deflectometer Data for Jointed Pavement Test Sections
5/1/2014 to 5/31/2016	$138092 Status: Completed 1B17

FHWA FHWA-PROJ-14-0129 Increase in Roughness Due to Environmental Factors in Flexible Pavements
7/23/2014 to 7/23/2017	$208583 Status: Completed 1B18

NCHRP LTPP-PROJ-0000063 NCHRP 20-50(22): LTPP Data Analysis: Feasibility of Using LTPP Data to Improve Use of Falling Weight Deflectometer and Longitudinal Profile Measurements
9/3/2019 to 10/30/2020	$100000 Status: Completed 1B19

NCHRP LTPP-PROJ-0000238 NCHRP 20-50(22)A: LTPP Data Analysis: Guidelines to Improve Use of Falling Weight Deflectometer and Longitudinal Profile Measurements
11/16/2021 to 2/15/2024	$350000 Status: Active 1B20

NCHRP LTPP-PROJ-0000049 NCHRP 20-50(21): Enhancements of Climatic Inputs and Related Models for Pavement ME Using LTPP Climate Tool (MERRA-2)
8/24/2018 to 2/23/2021	$350000 Status: Active 1B21

Problem Statement Number LTPP-PROJ-0000054 Examination of Construction Variability in the LTPP Database
1/1/2021 to 12/31/2022	$375000 Status: Planned 1B22

Problem Statement Number LTPP-PROJ-0000197 Material Characteristics for Pavement Design
$250000 Status: Proposed 1B23

Problem Statement Number LTPP-PROJ-0000199 Short- and Long-Term Variability of the Subgrade, Subbase, and Base Layer Properties (to be combined with LTPP-PROJ-0000038 and LTPP-PROJ-0000039)
$275000 Status: Proposed 1B24

Problem Statement Number LTPP-PROJ-0000201 Short- and Long-Term Variability of the Apshalt Concrete Layer Properties
$250000 Status: Proposed 1B25

Problem Statement Number LTPP-PROJ-0000064 Identification of the True Critical Variables for Understanding Temporal Variations in Pavements
$350000 Status: Proposed 1B26

Problem Statement Number LTPP-PROJ-0000061 Environmentally Induced Changes and Degradation
$200000 Status: Proposed 1B27

Problem Statement Number LTPP-PROJ-0000023 Performance of Treated Versus Untreated Sections of Unbound Materials
$0 Status: Proposed 1B28

Problem Statement Number LTPP-PROJ-0000050 Seasonal Variations in Moduli of Unbound Pavement Layers
$0 Status: Proposed 1B29

Problem Statement Number LTPP-PROJ-0000051 Seasonal Variations in Backcalculated Moduli of Asphalt-Bound Pavement Layers
$225000 Status: Proposed 1B30

Problem Statement Number LTPP-PROJ-0000052 Determination of Frost Penetration in Long-Term Pavement Performance Test Sections and Other Instrumented Sites
$100000 Status: Proposed 1B31

Problem Statement Number LTPP-PROJ-0000053 Impact of Maintenance and Rehabilitation Treatments on Temporal Variations in Pavement Materials
$1200000 Status: Proposed 1B32

Problem Statement Number LTPP-PROJ-0000211 Environmental Effect on Construction of Specific Pavement Studies (SPS) and the Influences of Paving Dates or Issues and The Effect on Pavement Performance
$0 Status: Proposed 1B33

Problem Statement Number LTPP-PROJ-0000212 Environmental Effects of Materials/Designs Used in Seasonal Monitoring Program (SMP) Locations and Their Ultimate Pavement Performance
$0 Status: Proposed 1B34

Problem Statement Number LTPP-PROJ-0000213 Evaluate In-Place Characteristics of Pavements
$0 Status: Proposed 1B35

Impact of material characteristics and properties on pavement performance. C
Critical 1

FHWA LTPP-PROJ-0000031 Analyses Relating to Pavement Material Characterizations and Their Effects on Pavement Performance
4/1/1995 to 9/1/1997	$270000 Status: Completed 1C1

FHWA LTPP-PROJ-0000030 Temperature Predictions and Adjustment Factors for Asphalt Pavements
10/1/1994 to 6/1/1999	$231930 Status: Completed 1C2

FHWA LTPP-PROJ-0000019 Assessment of Selected Long-Term Pavement Performance Material Data Tables and Development of Representative Test Tables – Volume I
9/1/1999 to 3/1/2001	$243000 Status: Completed 1C3

FHWA LTPP-PROJ-0000020 Study of Long-Term Pavement Performance Laboratory Resilient Modulus Test Data and Response Characteristics
6/1/2000 to 4/30/2001	$27000 Status: Completed 1C4

NCHRP LTPP-PROJ-0000017 NCHRP 20-50(14): LTPP Data Analysis: Significance of As-Constructed Asphalt Concrete Air Voids to Pavement Performance
6/5/2000 to 6/28/2002	$100000 Status: Completed 1C5

FHWA LTPP-PROJ-0000034 Review of the Long-Term Pavement Performance Backcalculation Results
1/23/2003 to 8/31/2005	$228530 Status: Completed 1C6

FHWA LTPP-PROJ-0000021 Long-Term Pavement Performance Computed Parameter: Dynamic Modulus (E*)
8/17/2007 to 9/30/2009	$316751 Status: Completed 1C7

FHWA LTPP-PROJ-0000040 Estimation of Key Portland Cement Concrete, Base, Subbase, and Component Engineering Properties From Routine Tests and Physical Characteristics
8/13/2007 to 4/13/2010	$368386 Status: Completed 1C8

FHWA FHWA-PROJ-11-0066 Backcalculation of the Long-Term Pavement Performance Program Deflection Data
9/30/2011 to 12/29/2015	$585144 Status: Completed 1C9

NCHRP LTPP-PROJ-0000029 NCHRP 9-48: Field Versus Laboratory Volumetrics and Mechanical Properties
8/1/2009 to 12/31/2015	$500000 Status: Completed 1C10

NCHRP LTPP-PROJ-0000198 NCHRP 1-50: Quantifying the Influence of Geosynthetics on Pavement Performance
9/1/2011 to 8/31/2016	$600000 Status: Completed 1C11

NCHRP LTPP-PROJ-0000018 NCHRP 9-49A: Performance of Warm-Mix Asphalt Technologies: Stage II — Long-Term Field Performance
4/29/2011 to 9/30/2016	$900000 Status: Completed 1C12

NCHRP LTPP-PROJ-0000035 NCHRP 20-50(19): LTPP Data Analysis: Feasibility of Using LTPP Data to Develop Relationships Between Laboratory- and Field-Derived Properties of Unbound Materials
6/11/2018 to 4/10/2019	$69762 Status: Completed 1C13

NCHRP LTPP-PROJ-0000024 NCHRP 20-50(18): LTPP Data Analysis: Significance of As-Constructed Asphalt Pavement Air Voids to Pavement Performance
4/1/2018 to 6/30/2020	$450000 Status: Completed 1C14

Problem Statement Number LTPP-PROJ-0000022 Effect of Reclaimed Asphalt Pavement and Polymer Modified Asphalt on Pavement Performance
1/1/2021 to 12/31/2022	$250000 Status: Planned 1C15

Problem Statement Number LTPP-PROJ-0000038 Estimating Subgrade Resilient Modulus From Conventional Soils Test Parameters (To Be Combined With LTPP-PROJ-0000039 and LTPP-PROJ-0000199)
$300000 Status: Proposed 1C16

Problem Statement Number LTPP-PROJ-0000039 Material Properties and Variability With Depth
$200000 Status: Proposed 1C17

Problem Statement Number LTPP-PROJ-0000118 Ground Penetrating Radar Signal Analysis to Determine Asphalt, Concrete, and Unbound In-Place Material Properties from LTPP Test Sections
$0 Status: Proposed 1C18

Problem Statement Number LTPP-PROJ-0000041 Estimation of Key Hot-Mix Asphalt, Base, Subgrade, and Component Engineering Properties from Routine Tests and Physical Characteristics
$500000 Status: Proposed 1C19

Problem Statement Number LTPP-PROJ-0000060 Conduct an Objective Assessment of the Applicability and Utility of Existing Models for Prediction of Long-Term Changes in Pavement Materials
$200000 Status: Proposed 1C20

Problem Statement Number LTPP-PROJ-0000122 Ground Penetrating Radar and Falling Weight Deflectometer Analysis to Develop a Constitutive Model from LTPP Test Sections
$0 Status: Proposed 1C21

Problem Statement Number LTPP-PROJ-0000202 Assessment of Changes in Pavement Friction Levels With Time and Loading
$400000 Status: Proposed 1C22

Problem Statement Number LTPP-PROJ-0000125 Ground Penetrating Radar Signal Analysis to Determine Asphalt Rutting, Fatigue, and Future Pay Factors During Construciton with LTPP Test Sections
$0 Status: Proposed 1C23

Problem Statement Number LTPP-PROJ-0000025 Aggregates and the Performance of Portland Cement Concrete
$650000 Status: Proposed 1C24

Problem Statement Number LTPP-PROJ-0000036 Relationships Among Material Properties Determined in the Laboratory and Field for Hot-Mix Asphalt
$375000 Status: Proposed 1C25

Problem Statement Number LTPP-PROJ-0000026 Change in Performance Grade Grading Over Time and Effect on Mixture Stiffness and Pavement Distress
$200000 Status: Proposed 1C26

Problem Statement Number LTPP-PROJ-0000037 Relationships Among Material Properties Determined in the Laboratory and Field for Portland Cement Concrete
$250000 Status: Proposed 1C27

Problem Statement Number LTPP-PROJ-0000027 Impact of Mix and Materials Properties on Individual Distress Type for Concrete Pavements
$0 Status: Proposed 1C28

Problem Statement Number LTPP-PROJ-0000128 Evaluation of Aggregate Absorptivity and Its Impact on Concrete Performance
$175000 Status: Proposed 1C29

Problem Statement Number LTPP-PROJ-0000028 Effect of Warm Mix on Pavement Performance
$0 Status: Proposed 1C30

Problem Statement Number LTPP-PROJ-0000214 Comparison with Lab Modulus and Falling Weight Deflectometer Backcalculated Modulus
$0 Status: Proposed 1C31

Problem Statement Number LTPP-PROJ-0000215 Support Performance Engineered Mixes Through the Use of LTPP Data and Materials
$0 Status: Proposed 1C32

Relationship among individual performance indicators (e.g. roughness, deflection, etc.) and pavement performance. D
High 2

NCHRP LTPP-PROJ-0000088 NCHRP 20-50(9): LTPP Data Analysis: Feasibility of Using Falling Weight Deflectometer Deflection Data to Characterize Pavement Construction Quality
5/2/2000 to 6/3/2002	$174996 Status: Completed 1D1

Problem Statement Number LTPP-PROJ-0000129 Use of Nondestructive Evaluation on Construction Risk Assessment
$675000 Status: Proposed 1D2

Problem Statement Number LTPP-PROJ-0000216 Construction Thickness Variability and Effect on Performance
$0 Status: Proposed 1D3

Capstone analysis findings. E
High 3

Problem Statement Number LTPP-PROJ-0000217 Identify and Delivery of Best Practices by Leveraging LTPP Data
1/1/2021 to 12/31/2022	$400000 Status: Planned 1E1

Problem Statement Number LTPP-PROJ-0000218 Verify Long-Term Pavement Performance Design Recommendations Using Accelerated Pavement Testing Data
1/1/2021 to 12/31/2022	$350000 Status: Planned 1E2

Problem Statement Number LTPP-PROJ-0000066 Assess and Quantify the Effects of Traffic Loading, Environment, and Their Interaction on Pavement Life
$500000 Status: Proposed 1E3

Problem Statement Number LTPP-PROJ-0000219 Rehabilitation Pavement Performance Findings Results
$0 Status: Proposed 1E4

Problem Statement Number LTPP-PROJ-0000220 Improved Hot Mix Asphalt Overlays of Rehabilitated Concrete Pavement
$0 Status: Proposed 1E5

Priorities

Critical - 32 Very High - 57 High - 8 Sequence 4321

Objective 2: Determine the effects of design features on pavement performance

Quantify the impact of specific design features (e.g., subsurface drainage, base types, shoulder types, edge support, etc.) on performance. A
Very High 1

FHWA LTPP-PROJ-0000162 Investigation of Development of Pavement Roughness
6/1/1995 to 8/1/1997	$194534 Status: Completed 2A1

FHWA LTPP-PROJ-0000163 Common Characteristics of Good and Poorly Performing Portland Cement Concrete and Asphalt Concrete Pavements
10/1/1996 to 11/1/1997	$240003 Status: Completed 2A2

NCHRP LTPP-PROJ-0000158 NCHRP 1-34B: Effectiveness of Subsurface Drainage for Hot-Mix Asphalt and Portland Cement Concrete Pavements
4/1/1999 to 11/30/1999	$50000 Status: Completed 2A3

NCHRP LTPP-PROJ-0000157 NCHRP 1-34A: Contributions of Pavement Structural Layers to Rutting of Flexible Pavements
6/18/1999 to 7/31/2001	$149923 Status: Completed 2A4

NCHRP LTPP-PROJ-0000161 NCHRP 20-50(8/13): LTPP Data Analysis: Factors Affecting Pavement Smoothness
10/25/1999 to 12/30/2001	$199998 Status: Completed 2A5

NCHRP LTPP-PROJ-0000159 NCHRP 1-34C: Effects of Subsurface Drainage on Performance of Asphalt and Concrete Pavements
4/6/2000 to 3/31/2003	$116924 Status: Completed 2A6

NCHRP LTPP-PROJ-0000160 NCHRP 1-34D: Effects of Subsurface Drainage on Performance of Asphalt and Concrete Pavements, Evaluation, and Analysis of Long-Term Pavement Performance SPS-1 and SPS-2 Field Sections
11/18/2002 to 12/31/2006	$230000 Status: Completed 2A7

FHWA LTPP-PROJ-0000164 Curl and Warp Analysis of the Long-Term Pavement Performance SPS-2 Site in Arizona
2/26/2010 to 7/31/2012	$28000 Status: Completed 2A8

FHWA FHWA-PROJ-14-0130 Advancement of Profile-Based Curl and Warp Analysis Using Long-Term Pavement Performance (LTPP) Profile Data
5/9/2014 to 11/10/2018	$249990 Status: Completed 2A9

Problem Statement Number LTPP-PROJ-0000167 Quantify the Impact of Design Features on Measured Distresses for Rehabilitated Flexible Pavements
$300000 Status: Proposed 2A11

Problem Statement Number LTPP-PROJ-0000168 Quantify the Impact of Design Features on Measured Distresses for Rehabilitated Rigid Pavements
$300000 Status: Proposed 2A12

Problem Statement Number LTPP-PROJ-0000170 Common Characteristics of Good and Poorly Performing Asphalt Concrete and Portland Cement Concrete Pavements
$300000 Status: Proposed 2A13

Problem Statement Number LTPP-PROJ-0000171 Factors Affecting Pavement Smoothness/Roughness
$250000 Status: Proposed 2A14

Impact of design features on measured pavement responses (deflections, load-transfer, strains, etc.). B
High 4

FHWA LTPP-PROJ-0000149 Review of SPS-1, -2, -5, and -6 Experiments
7/12/1999 to 12/31/2000	$360000 Status: Completed 2B1

FHWA LTPP-PROJ-0000150 Evaluation and Analysis of Long-Term Pavement Performance Pavement Layer Thickness Data
9/1/1999 to 12/31/2000	$191000 Status: Completed 2B2

NCHRP LTPP-PROJ-0000148 NCHRP 20-50(2): LTPP Data Analysis: Relative Performance of Jointed Plain Concrete Pavements With Sealed and Unsealed Joints
7/29/1999 to 1/31/2001	$74963 Status: Completed 2B3

FHWA LTPP-PROJ-0000151 Study of Environmental Effects in the Absence of Heavy Loads, SPS-8 – Initial Evaluation and Analysis
3/1/2001 to 1/1/2002	$75000 Status: Completed 2B4

FHWA LTPP-PROJ-0000152 Evaluation of Joint and Crack Load Transfer
3/1/2001 to 1/1/2002	$75000 Status: Completed 2B5

NCHRP LTPP-PROJ-0000153 NCHRP 20-50(10/16): LTPP Data Analysis: Influence of Design and Construction Features on the Response and Performance of New Flexible and Rigid Pavements
6/27/2002 to 3/22/2005	$299301 Status: Completed 2B6

FHWA LTPP-PROJ-0000154 Impact of Design Features on Pavement Response and Performance in Rehabilitated Flexible and Rigid Pavements
8/13/2007 to 3/30/2010	$317507 Status: Completed 2B7

FHWA FHWA-PROJ-11-0034 Environmental Effects in the Absence of Heavy Loads, Specific Pavement Study 8
4/20/2011 to 5/19/2015	$269632 Status: Completed 2B8

Guidelines to select design features for improved pavement performance. C
Critical 1

Problem Statement Number LTPP-PROJ-0000165 Influence of SPS-1 and SPS-8 Design Features on Performance of Flexible Pavements
1/1/2021 to 12/31/2022	$500000 Status: Planned 2C1

Problem Statement Number LTPP-PROJ-0000166 Influence of SPS-2 and SPS-8 Design Features on Performance of Rigid Pavements
1/1/2021 to 12/31/2022	$600000 Status: Planned 2C2

Problem Statement Number LTPP-PROJ-0000221 Development of a Plan for an LTPP Satellite Research Program for Pavement Preservation
1/1/2021 to 12/31/2022	$150000 Status: Planned 2C3

Problem Statement Number LTPP-PROJ-0000222 Development of a Plan for an LTPP Satellite Research Program for New Construction
1/1/2021 to 12/31/2022	$150000 Status: Planned 2C4

Capstone analysis findings. D
High 1

Problem Statement Number LTPP-PROJ-0000223 Final Analysis of the SPS-5 Experiment: Rehabilitation of Asphalt Concrete Pavements
$0 Status: Proposed 2D1

Problem Statement Number LTPP-PROJ-0000224 Final Analysis of the SPS-6 Experiment: Rehabilitation of Jointed Portland Cement Concrete Pavements
$0 Status: Proposed 2D2

Priorities

Critical - 4 Very High - 13 High - 10 Sequence 4321

Objective 3: Improve selection and design methodologies for new and rehabilitated pavements

Enhanced pavement response and performance prediction models. A
High 3

FHWA LTPP-PROJ-0000101 Validation of Guidelines for k-Value Selection and Concrete Pavement Performance Prediction
10/1/1994 to 7/1/1996	$84000 Status: Completed 3A1

FHWA LTPP-PROJ-0000102 Design and Construction of Portland Cement Concrete Pavements, Volume I
10/1/1994 to 8/1/1998	$84000 Status: Completed 3A2

FHWA LTPP-PROJ-0000103 Design and Construction of Portland Cement Concrete Pavements, Volume II
10/1/1994 to 8/1/1998	$84000 Status: Completed 3A3

FHWA LTPP-PROJ-0000104 Design and Construction of Portland Cement Concrete Pavements, Volume III
10/1/1994 to 8/1/1998	$84000 Status: Completed 3A4

FHWA LTPP-PROJ-0000094 Comparison and Quality Evaluation of Long-Term Pavement Performance Dynamic Load Response Data From Ohio and North Carolina
12/1/1999 to 12/1/2000	$50000 Status: Completed 3A5

FHWA LTPP-PROJ-0000205 LTPP Ohio SPS-1 and 2 Dynamic Load Response Data Processing
8/1/2011 to 10/1/2012	$0 Status: Completed 3A6

Problem Statement Number LTPP-PROJ-0000115 Coupling Load-Response and Pavement Performance Prediction Models
$375000 Status: Proposed 3A7

Problem Statement Number LTPP-PROJ-0000097 Development of Alternative Computational Tools to Enhance Model Response (After NCHRP 1-47)
$450000 Status: Proposed 3A8

Problem Statement Number LTPP-PROJ-0000226 Backcalculated Dynamic Modulus Mastercurve from the Time History of Falling Weight Deflectometer Surface Deflections
$0 Status: Proposed 3A9

Problem Statement Number LTPP-PROJ-0000227 Development of Enhanced Method to Predict Asphalt Pavement Performance Using Deflection Basin Parameters
$0 Status: Proposed 3A10

Problem Statement Number LTPP-PROJ-0000229 Measurement of Pavement Responses After Construction
$0 Status: Proposed 3A11

Distress prediction based on commonly collected pavement data. B
Very High 2

NCHRP LTPP-PROJ-0000099 NCHRP 20-50(5): LTPP Data Analysis: Variations in Pavement Design Inputs
10/13/1999 to 10/12/2001	$249991 Status: Completed 3B1

NCHRP LTPP-PROJ-0000106 NCHRP 1-42: Top-Down Fatigue Cracking of Hot-Mix Asphalt Layers - Phase I
8/22/2003 to 2/28/2005	$39556 Status: Completed 3B2

NCHRP LTPP-PROJ-0000241 NCHRP 1-42A: Models for Predicting Top-Down Cracking of Hot-Mix Asphalt Layers
5/1/2006 to 12/31/2009	$360000 Status: Completed 3B3

NCHRP LTPP-PROJ-0000105 NCHRP 1-41: Models for Predicting Reflection Cracking of Hot-Mix Asphalt Overlays
2/3/2005 to 2/26/2010	$500000 Status: Completed 3B4

NCHRP LTPP-PROJ-0000092 NCHRP 1-46: Handbook for Pavement Design, Construction, and Management
10/1/2009 to 12/31/2011	$400000 Status: Completed 3B5

NCHRP LTPP-PROJ-0000108 NCHRP 9-30A: Calibration of Rutting Models for Hot-Mix Asphalt Structural and Mix Design
8/29/2005 to 3/31/2012	$1000000 Status: Completed 3B6

NCHRP LTPP-PROJ-0000107 NCHRP 1-52: A Mechanistic-Empirical Model for Top-Down Cracking of Asphalt Pavement Layers
3/4/2013 to 3/30/2018	$500000 Status: Completed 3B7

FHWA LTPP-PROJ-0000207 LTPP Computed Parameter: Top-Down Cracking
7/21/2014 to 9/20/2018	$239099 Status: Completed 3B8

Problem Statement Number LTPP-PROJ-0000110 Development of Longitudinal Cracking Models for Portland Cement Concrete Pavements
1/1/2021 to 12/31/2022	$350000 Status: Planned 3B9

Problem Statement Number LTPP-PROJ-0000114 Development of Mechanistic-Empirical Pavement Design Performance Models for Other Pavement Distresses Affecting Functional Performance
1/1/2021 to 12/31/2022	$400000 Status: Planned 3B10

Problem Statement Number LTPP-PROJ-0000096 Effect of Multiple Axle Group Loading on Pavement Performance
$1500000 Status: Proposed 3B11

Problem Statement Number LTPP-PROJ-0000098 Use of Energy Density Methods to Predict Pavement Response
$700000 Status: Proposed 3B12

Problem Statement Number LTPP-PROJ-0000111 Revise Modeling of Fatigue Cracking to be a Fracture and Healing Process
$900000 Status: Proposed 3B13

Problem Statement Number LTPP-PROJ-0000230 Establishing Protocols for Pavement Subgrade Asset Management
$0 Status: Proposed 3B14

Problem Statement Number LTPP-PROJ-0000231 Studying Curling and Warping Impacts on Continuously Reinforced Concrete Pavement
$0 Status: Proposed 3B15

LTPP data to support/improve mechanistic-empirical procedures. C
Critical 1

NCHRP LTPP-PROJ-0000174 NCHRP 1-32: Systems for Design of Highway Pavements
2/1/1994 to 11/11/1997	$500000 Status: Completed 3C1

NCHRP LTPP-PROJ-0000173 NCHRP 20-07/Task 106: Thermal Movement Design Procedure for Concrete
1/1/1999 to 6/2/2002	$30000 Status: Completed 3C2

NCHRP LTPP-PROJ-0000091 NCHRP 1-37A: Development of the 2002 Guide for the Design of New and Rehabilitated Pavement Structures (Phase II)
2/1/1998 to 2/28/2004	$6579080 Status: Completed 3C3

NCHRP LTPP-PROJ-0000239 NCHRP 1-40B: User Manual and Local Calibration Guide for the Mechanistic-Empirical Pavement Design Guide and Software
1/28/2005 to 2/28/2009	$324995 Status: Completed 3C4

NCHRP LTPP-PROJ-0000240 NCHRP 1-40D: Technical Assistance to NCHRP and NCHRP Project 1-40A: Versions 0.9 and 1.0 of the Mechanistic-Empirical Pavement Design Software
7/18/2005 to 12/31/2009	$642819 Status: Completed 3C5

NCHRP LTPP-PROJ-0000093 NCHRP 1-47: Sensitivity Evaluation of Mechanistic-Empirical Pavement Design Guide Performance Prediction
9/2/2009 to 12/31/2011	$0 Status: Completed 3C6

NCHRP LTPP-PROJ-0000116 NCHRP 1-49: Guidelines for Conducting Forensic Investigation of Highway Pavements
4/7/2010 to 12/30/2012	$499999 Status: Completed 3C7

FHWA FHWA-PROJ-10-0006 National Forensic Workshop and Forensic Guidelines
2/1/2010 to 3/1/2013	$125000 Status: Completed 3C8

NCHRP LTPP-PROJ-0000184 NCHRP 9-44A: Validating an Endurance Limit for Hot-Mix Asphalt Pavements: Laboratory Experiment and Algorithm Development
9/1/2009 to 9/30/2013	$839456 Status: Completed 3C9

FHWA FHWA-PROJ-14-0126 Characterizing Existing Hot-Mix Asphalt Layer Damage for Mechanistic Pavement Rehabilitation Design
7/21/2014 to 7/21/2017	$249771 Status: Completed 3C10

FHWA LTPP-PROJ-0000208 Using Multiobjective Optimization to Enhance Calibration of Performance Models in the Mechanistic-Empirical Pavement Design Guide
7/28/2014 to 10/31/2017	$115404 Status: Completed 3C11

FHWA LTPP-PROJ-0000206 Effect of Dowel Misalignment on Concrete Pavement Performance
5/9/2014 to 12/8/2017	$274773.71 Status: Completed 3C12

NCHRP LTPP-PROJ-0000243 NCHRP 9-57A: Ruggedness of Laboratory Tests to Assess Cracking Resistance of Asphalt Mixtures
6/15/2018 to 10/31/2022	$750000 Status: Completed 3C13

NCHRP LTPP-PROJ-0000244 NCHRP 9-57B: Field Validation of Laboratory Cracking Tests of Asphalt Mixtures
1/1/2021 to 12/31/2022	$250000 Status: Planned 3C14

Problem Statement Number LTPP-PROJ-0000189 Model for Predicting Degradation of Unbound Granular Base and Subbase Quality of In-Service Pavements
1/1/2021 to 12/31/2022	$300000 Status: Planned 3C15

Problem Statement Number LTPP-PROJ-0000179 Using Seasonal and Diurnal Profile Data to Understand the Curling and Warping Effects on Jointed Concrete Pavements
1/1/2021 to 12/31/2022	$0 Status: Planned 3C16

Problem Statement Number LTPP-PROJ-0000225 Assessment of and Guidance on Future Enhancements to Models for Predicting Variability in Pavement Layer Modulus Over Time
1/1/2021 to 12/31/2022	$600000 Status: Planned 3C17

Problem Statement Number LTPP-PROJ-0000175 Creation of Mechanistic-Empirical Pavement Design Guide Subdatabase of Most Complete Datasets That Can Be Used for Analysis
$300000 Status: Proposed 3C18

Problem Statement Number LTPP-PROJ-0000187 Cracking Mechanisms
$0 Status: Proposed 3C19

Problem Statement Number LTPP-PROJ-0000176 State Data vs. Long-Term Pavement Performance Data Since Long-Term Pavement Performance Units and Protocols Were Used in Mechanistic-Empirical Pavement Design Guide
$400000 Status: Proposed 3C20

Problem Statement Number LTPP-PROJ-0000188 New Models Related to Distress Prediction
$400000 Status: Proposed 3C21

Problem Statement Number LTPP-PROJ-0000177 Update Default Values
$250000 Status: Proposed 3C22

Problem Statement Number LTPP-PROJ-0000178 States Need Local Data for Items Like Coefficient of Thermal Expansion, Dynamic Modulus, Resilient Modulus of Unbound Layers
$0 Status: Proposed 3C23

Problem Statement Number LTPP-PROJ-0000180 Evaluate Whether Added Climate Data Are Needed for Mechanistic-Empirical Pavement Design
$0 Status: Proposed 3C24

Problem Statement Number LTPP-PROJ-0000182 Benefits of Design Features Captured Adequately in Mechanistic-Empirical Models
$0 Status: Proposed 3C25

Problem Statement Number LTPP-PROJ-0000183 Developing Pavement Catalogs
$400000 Status: Proposed 3C26

Problem Statement Number LTPP-PROJ-0000228 Guidelines for Developing Mini Long-term Pavement Performance Program
$0 Status: Proposed 3C27

Priorities

Critical - 27 Very High - 15 High - 11 Sequence 4321

Objective 4: Improved strategies for planning maintenance and preservation treatments

Performance analysis ready maintenance and preservation data sets. A
High 1

FHWA LTPP-PROJ-0000131 Performance of Rehabilitated Asphalt Concrete Pavements in the Long-Term Pavement Performance Experiments
10/1/1997 to 8/1/1999	$54000 Status: Completed 4A1

FHWA LTPP-PROJ-0000133 Long-Term Pavement Performance Maintenance and Rehabilitation Data Review
7/1/1999 to 4/1/2000	$54000 Status: Completed 4A2

FHWA LTPP-PROJ-0000132 Assessment of the SPS-7 Bonded Concrete Overlays Experiment
7/1/1999 to 12/1/2000	$25433 Status: Completed 4A3

NCHRP LTPP-PROJ-0000130 NCHRP 20-50(3/4): LTPP Data Analysis: Effectiveness of Maintenance and Rehabilitation Options
10/14/1999 to 3/31/2002	$250000 Status: Completed 4A4

Problem Statement Number LTPP-PROJ-0000135 Determination of Long-Term Pavement Performance Experiment Maturity for Analysis in Maintenance and Rehabilitation and Other Strategic Objective Analytical Projects
$180000 Status: Proposed 4A5

Problem Statement Number LTPP-PROJ-0000233 Development of LTPP Pavement Preservation Analysis Dataset
$0 Status: Proposed 4A6

Problem Statement Number LTPP-PROJ-0000234 Development of Maintenance and Rehabilitation Analysis Datasets
$0 Status: Proposed 4A7

Procedures for identifying maintenance and preservation needs. B
Critical 2

NCHRP LTPP-PROJ-0000143 NCHRP 9-40: Optimization of Tack Coat for Hot-Mix Asphalt Placement
7/1/2005 to 12/31/2011	$428000 Status: Completed 4B1

Problem Statement Number LTPP-PROJ-0000142 Development of Distress Threshold Triggers for Maintenance and Rehabilitation Treatments
1/1/2021 to 12/31/2022	$350000 Status: Planned 4B2

Problem Statement Number LTPP-PROJ-0000146 Selection of Appropriate Pavement Rehabilitation Techniques for Existing Conditions and Features
1/1/2021 to 12/31/2022	$350000 Status: Planned 4B3

Problem Statement Number LTPP-PROJ-0000144 Determine the Effect of Repair Techniques on the Performance of Subsequent Hot-Mix Asphalt Overlays
$250000 Status: Proposed 4B4

Problem Statement Number LTPP-PROJ-0000147 Methodology to Enable Development of Long-Term Rehabilitation and Maintenance Schedules
$750000 Status: Proposed 4B5

Performance prediction of maintenance and preservation treatments. C
Very High 2

NCHRP LTPP-PROJ-0000136 NCHRP 1-38: Guide on Pavement Rehabilitation Strategies
3/1/1999 to 3/31/2001	$100000 Status: Completed 4C1

NCHRP LTPP-PROJ-0000137 NCHRP 14-14: Guide for Optimal Timing of Pavement Preventive Maintenance Treatment Applications
4/10/2000 to 9/30/2003	$312397 Status: Completed 4C2

NCHRP LTPP-PROJ-0000194 NCHRP 1-48: Incorporating Pavement Preservation Into the Mechanistic-Empirical Pavement Design Guide
7/26/2010 to 12/31/2013	$262124 Status: Completed 4C3

FHWA FHWA-PROJ-13-0098 Pavement Performance Measures and Forecasting, and the Effects of Maintenance and Rehabilitation Strategy on Treatment Effectiveness
9/30/2013 to 12/31/2016	$415197 Status: Completed 4C4

NCHRP LTPP-PROJ-0000139 NCHRP 20-50(17): LTPP Data Analysis: Consequences of Deferred Treatment of Pavement Preservation Treatment Placement on Asphalt Concrete, Portland Cement Concrete and Composite Pavement Structures
3/1/2018 to 3/1/2018	$425000 Status: Cancelled 4C5

Problem Statement Number LTPP-PROJ-0000232 Incorporation of Structural Condition into Maintenance Decision-Making
1/1/2021 to 12/31/2022	$350000 Status: Planned 4C6

Problem Statement Number LTPP-PROJ-0000140 Followup of NCHRP to 14-14 Research with Emphasis on Quantitative Analysis of Enlarged Long-Term Pavement Performance Maintenance and Rehabilitation Database (M&R) and Supplemental M&R Data From State Highway Administrations and Others
$250000 Status: Proposed 4C7

Problem Statement Number LTPP-PROJ-0000141 Development of Cost-Effective Combinations of Scheduled Maintenance and Rehabilitation Treatments Over Long-Life Pavement Design Periods
$375000 Status: Proposed 4C8

Problem Statement Number LTPP-PROJ-0000145 Cost Effectiveness of Maintenance and Rehabilitation Design Features
$150000 Status: Proposed 4C9

Problem Statement Number LTPP-PROJ-0000235 Development of Pavement Performance Models for Selected Preservation Treatments
$0 Status: Proposed 4C10

Priorities

Critical - 5 Very High - 10 High - 7 Sequence 4321

Objective 5: Improve pavement asset management practices

Evaluation and use of pavement performance data in pavement management and performance reporting. A
Very High 1

NCHRP LTPP-PROJ-0000087 NCHRP 20-05/Topic10-05: Collection and Use of Pavement Condition Data
7/1/1980 to 7/1/1981	$0 Status: Completed 5A1

FHWA FHWA-PROJ-10-0069 Relating Ride Quality and Structural Adequacy for Pavement Rehabilitation/Design Decisions
12/1/2010 to 12/1/2012	$227465 Status: Completed 5A2

FHWA LTPP-PROJ-0000084 Estimate Long-Term Pavement Performance Faulting Data Using Profile Measurements
11/1/2012 to 11/1/2014	$0 Status: Completed 5A3

FHWA FHWA-PROJ-14-0008 Validation of Pavement Performance Measures
5/1/2014 to 10/30/2017	$291743 Status: Completed 5A4

FHWA FHWA-PROJ-14-0021 Using Long-Term Pavement Performance Program Distress Data to Support Performance-Based Reporting
5/9/2014 to 11/8/2018	$159788 Status: Completed 5A5

Problem Statement Number LTPP-PROJ-0000236 Climate Models for Transportation Asset Management
9/16/2022 to 12/15/2024	$335129 Status: Active 5A6

Problem Statement Number LTPP-PROJ-0000083 Localized International Roughness Index Roughness Triggers for Pavement Maintenance Actions
1/1/2021 to 12/31/2022	$150000 Status: Planned 5A7

Problem Statement Number LTPP-PROJ-0000196 Comprehensive Perspective and Strategic Lessons Learned from the LTPP Program
$600000 Status: Proposed 5A8

Problem Statement Number LTPP-PROJ-0000192 Numerical Pavement Evaluation Indices for Pavement Condition (Summary Condition Index)
$200000 Status: Proposed 5A9

Data collection efficiency and quality management. B
High 1

FHWA LTPP-PROJ-0000069 Assessment of Long-Term Pavement Performance Friction Data
8/1/1997 to 7/1/1998	$55838 Status: Completed 5B1

FHWA LTPP-PROJ-0000070 Study of Long-Term Pavement Performance Distress Data Variability
1/1/1997 to 12/1/1998	$100000 Status: Completed 5B2

FHWA LTPP-PROJ-0000073 Preliminary Evaluation and Analysis of Long-Term Pavement Performance Faulting Data
5/1/1998 to 12/31/1998	$58000 Status: Completed 5B3

FHWA LTPP-PROJ-0000072 Long-Term Pavement Performance Profile Variability
7/28/1997 to 3/1/2000	$397000 Status: Completed 5B4

NCHRP LTPP-PROJ-0000068 NCHRP 1-35A: Guide for Pavement Management: American Association of State Highway and Transportation Officials Pavement Management Guide
12/1/1997 to 6/30/2000	$200000 Status: Completed 5B5

FHWA LTPP-PROJ-0000074 Characterization of Transverse Profiles
7/28/1997 to 9/1/2000	$196000 Status: Completed 5B6

FHWA LTPP-PROJ-0000071 Distress Data Consolidation
8/15/1998 to 12/31/2000	$141000 Status: Completed 5B7

FHWA LTPP-PROJ-0000079 Study of Long-Term Pavement Performance Pavement Deflections
4/1/2001 to 9/1/2001	$100000 Status: Completed 5B8

FHWA LTPP-PROJ-0000075 Pavement Smoothness Index Relationships
2/1/2001 to 11/1/2001	$60000 Status: Completed 5B9

FHWA LTPP-PROJ-0000076 Smoothness Index Differences Related to Long-Term Pavement Performance Equipment Type
1/6/2004 to 4/30/2005	$78437 Status: Completed 5B10

NCHRP LTPP-PROJ-0000078 NCHRP 20-05/Topic 39-01: Quality Management of Pavement Distress Data Collection
10/1/2007 to 9/30/2008	$30000 Status: Completed 5B11

FHWA FHWA-PROJ-09-0024 Simplified Techniques for Evaluation and Interpretation of Pavement Deflections for Network-Level Analysis
8/1/2009 to 10/31/2011	$299951 Status: Completed 5B12

FHWA LTPP-PROJ-0000082 Quality Management Procedures for Network Level Pavement Condition Data
10/1/2011 to 2/28/2013	$149193 Status: Completed 5B13

NCHRP LTPP-PROJ-0000242 NCHRP 10-98: Protocols for Network-Level Macrotexture Measurement
9/6/2016 to 3/5/2020	$500000 Status: Completed 5B14

Problem Statement Number LTPP-PROJ-0000077 Establishing Pavement Data Collection Requirements for Network-Level and Project-Level Pavement Management
1/1/2021 to 12/31/2022	$400000 Status: Planned 5B15

Problem Statement Number LTPP-PROJ-0000081 Quantitative Information of Environmental Variables on Pavement Performance Measures
$500000 Status: Proposed 5B16

Problem Statement Number LTPP-PROJ-0000086 Guidelines for Transitioning From One Technology to Another
$500000 Status: Proposed 5B17

Capstone analysis findings. C
Critical 1

Problem Statement Number LTPP-PROJ-0000237 Development of Predictive Pavement Performance Models for Asset Management
1/1/2021 to 12/31/2022	$750000 Status: Planned 5C1

Priorities

Critical - 1 Very High - 9 High - 17 Sequence 4321

Long-Term Pavement Performance Data Analysis Program

Strategic Plan Objectives, Analysis Outcomes, and Supporting Project

Objective

Priorities

Critical
Very High
High
Sequence1234

Sequence numbers denote the order in which Analysis Outcomes should be addressed for a given Objective. Analysis Outcomes with the same sequence number can be addressed at the same time.

Dashed light blue boxes are ongoing NCHRP projects that were initiated by the LTPP ETG. Solid Light Blue boxes are completed projects.
Dashed pink boxes are ongoing NCHRP projects that were initiated by other agencies or work groups, but are directly associated with LTPP Data Analysis Plan Strategic Objectives and Analysis Outcomes.Solid Pink boxes are completed projects.
Dashed white boxes are proposed Research Problem Statements that were developed at LTPP Workshops. See Note 1) for an explanation of the Problem Statement Numbering scheme.

Hashed orange boxes are planned FHWA projects or data studies that will be funded using LTPP budgeted funds.
Dashed orange boxes are ongoing FHWA projects that were funded using LTPP budgeted funds.
Thin solid boxes are completed projects with reports pending.
Thick solid boxes are completed projects with reports published.

March 13, 2017

Note

1) Problem Statements are assigned a 3 character number using the convention 'O_A_n'. 'O' is the associated Strategic Objective number (1 through 9); 'A' is the associated Analysis Outcome letter (A, B, C etc.) and 'n' is an arbitrarily assigned number used for identification purposes. The number 'n' does not imply a sequence in which Problem Statements should be addressed.

Last Updated: January 30, 2024

WesTrack data has not been collected by the LTPP program.

: Analysis

heading

Long-Term Pavement Performance Data Analysis Program

Strategic Plan Objectives, Analysis Outcomes, and Supporting Project