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

There are 220 of 220 projects currently selected. Clear

Objective 1: Traffic characterization and prediction

Guidelines for data collection (hardware, software, placement, calibration, data collection frequency). Some elements require work beyond LTPP data analysis, but analysis is needed to provide some components. A - Critical

NCHRP 1-39 Traffic Data Collection, Analysis, and Forecasting for Mechanistic Pavement Design
8/30/2000 to 7/30/2004	$500000 Status: Completed 1A1

FHWA LTPP-PROJ-0000002 Long-Term Pavement Performance Weigh-in-Motion Approach Smoothness Specifications
1/1/2000 to 11/1/2005	$0 Status: Completed 1A2

FHWA LTPP-PROJ-0000204 Refinement of Pavement Smoothness Requirements for WIM Systems
10/1/2009 to 8/1/2012	$0 Status: Completed 1A3

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 1A4

FHWA LTPP-PROJ-0000004 Develop Tools to Improve Accuracy of Traffic Loading Data Collection
N/A to N/A	$350000 Status: Programmed 1A5

Problem Statement Number LTPP-PROJ-0000005 Validate Vehicle Simulation Model and Provide Recommendations for Improved Weigh-in-Motion Site Selection and Calibration
N/A to N/A	$750000 Status: Proposed 1A6

Problem Statement Number LTPP-PROJ-0000006 Truck Tire Wander, Pressure, and Width Data Collection
N/A to N/A	$150000 Status: Proposed 1A7

Problem Statement Number LTPP-PROJ-0000007 Adding Axle Groupings Beyond Quad Tire Groups to Long-Term Pavement Performance Database
N/A to N/A	$30000 Status: Proposed 1A8

Problem Statement Number LTPP-PROJ-0000008 Collecting Data From Static Scales
N/A to N/A	$75000 Status: Proposed 1A9

Problem Statement Number LTPP-PROJ-0000009 Innovative Cost-Effective Alternatives to Traditional Weigh-in-Motion Calibration
N/A to N/A	$200000 Status: Proposed 1A10

Guidelines for using traffic data in pavement applications. B - Critical

FHWA LTPP-PROJ-0000010 Optimization of Traffic Data Collection for Specific Pavement Applications
1/23/2003 to 8/15/2005	$266058 Status: Completed 1B1

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 1B2

FHWA LTPP-PROJ-0000011 Effect of Traffic Data Input Levels on Mechanistic-Empirical Pavement Design Guide Outputs
N/A to N/A	$350000 Status: Programmed 1B3

Problem Statement Number LTPP-PROJ-0000012 Evaluation of Lane and Directional Changes of Traffic Loading Over Time
N/A to N/A	$150000 Status: Proposed 1B4

FHWA LTPP-PROJ-0000013 Guidance to Facilitate the Analyst's Use of the Long-Term Pavement Performance Traffic Data
7/21/2014 to 12/31/2017	$412210.35 Status: Active 1B5

Procedures for forecasting and backcasting traffic loading data. C - Very High

FHWA LTPP-PROJ-0000014 Estimating Cumulative Traffic Loads, Phase 1
10/15/1998 to 9/30/2001	$250000 Status: Completed 1C1

FHWA LTPP-PROJ-0000015 Estimating Cumulative Traffic Loads, Phase 2
10/31/1999 to 12/20/2002	$293000 Status: Completed 1C2

FHWA LTPP-PROJ-0000016 Modeling and Predicting Truck Loading Patterns for Pavement Design
7/21/2014 to 9/1/2017	$193919 Status: Active 1C3

Priorities

Critical - 15 Very High - 3 High - 0 Sequence 321

Objective 2: Materials characterization

Relate material properties to pavement performance. A - Critical

NCHRP 20-50(14) Significance of As-Constructed Asphalt Concrete Air Voids to Pavement Performance
6/5/2000 to 6/28/2002	$100000 Status: Completed 2A1

NCHRP 9-49A Performance of Warm-Mix Asphalt Technologies: Stage II — Long-Term Field Performance
4/29/2011 to 9/30/2016	$900000 Status: Active 2A2

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 2A3

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 2A4

FHWA LTPP-PROJ-0000021 Long-Term Pavement Performance Computed Parameter: Dynamic Modulus (E*)
8/17/2007 to 9/30/2009	$316751 Status: Completed 2A5

Problem Statement Number LTPP-PROJ-0000022 Effect of Reclaimed Asphalt Pavement and Polymer Modified Asphalt on Pavement Performance
N/A to N/A	$150000 Status: Proposed 2A6

Problem Statement Number LTPP-PROJ-0000023 Performance of Treated Versus Untreated Sections of Unbound Materials
N/A to N/A	$0 Status: Proposed 2A7

FHWA LTPP-PROJ-0000024 Significance of As-Constructed Asphalt Pavement Air Voids to Pavement Performance
N/A to N/A	$425000 Status: Programmed 2A8

Problem Statement Number LTPP-PROJ-0000025 Version 2: Aggregates and the Performance of Portland Cement Concrete
N/A to N/A	$650000 Status: Proposed 2A9

Problem Statement Number LTPP-PROJ-0000026 Change in Performance Grade Grading Over Time and Effect on Mixture Stiffness and Pavement Distress
N/A to N/A	$200000 Status: Proposed 2A10

Problem Statement Number LTPP-PROJ-0000027 Impact of Mix and Materials Properties on Individual Distress Type for Concrete Pavements
N/A to N/A	$0 Status: Proposed 2A11

Problem Statement Number LTPP-PROJ-0000028 Effect of Warm Mix on Pavement Performance
N/A to N/A	$0 Status: Proposed 2A12

Relationships among material properties determined in the laboratory and field. B - Very High

NCHRP 9-48 Field Versus Laboratory Volumetrics and Mechanical Properties
8/1/2009 to 12/31/2015	$500000 Status: Completed 2B1

FHWA LTPP-PROJ-0000030 Temperature Predictions and Adjustment Factors for Asphalt Pavements
10/1/1994 to 6/1/1999	$231930 Status: Completed 2B2

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 2B3

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 2B4

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 2B5

FHWA LTPP-PROJ-0000034 Review of the Long-Term Pavement Performance Backcalculation Results
1/23/2003 to 8/31/2005	$228530 Status: Completed 2B6

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 2B7

FHWA LTPP-PROJ-0000035 Relationships Between Material Properties Determined in Field and Laboratory for Untreated Materials
N/A to N/A	$300000 Status: Programmed 2B8

Problem Statement Number LTPP-PROJ-0000036 Relationships Among Material Properties Determined in the Laboratory and Field for Hot-Mix Asphalt
N/A to N/A	$375000 Status: Proposed 2B9

Problem Statement Number LTPP-PROJ-0000037 Relationships Among Material Properties Determined in the Laboratory and Field for Portland Cement Concrete
N/A to N/A	$250000 Status: Proposed 2B10

Estimate material design properties from conventional material parameters. C - Very High

Problem Statement Number LTPP-PROJ-0000038 Estimating Subgrade Resilient Modulus From Conventional Soils Test Parameters (To Be Combined With 2D2 and 2F1a)
N/A to N/A	$300000 Status: Proposed 2C1

Using deflection and DCP procedures to obtain material properties and their variability. D - Very High

Problem Statement Number LTPP-PROJ-0000039 Material Properties and Variability With Depth (To Be Combined With 2C2 and 2F1a)
N/A to N/A	$200000 Status: Proposed 2D1

Guidelines for characterizing material properties. E - High

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 2E1

Problem Statement Number LTPP-PROJ-0000041 Estimation of Key Hot-Mix Asphalt, Base, Subgrade, and Component Engineering Properties from Routine Tests and Physical Characteristics
N/A to N/A	$500000 Status: Proposed 2E2

Time and load dependent material properties. F - High

NCHRP 1-50 Quantifying the Influence of Geosynthetics on Pavement Performance
9/1/2011 to 8/31/2016	$600000 Status: Active 2F1

Problem Statement Number LTPP-PROJ-0000199 Short- and Long-Term Variability of the Subgrade, Subbase, and Base Layer Properties (to be combined with 2C2 and 2D2)
N/A to N/A	$275000 Status: Proposed 2F2

Problem Statement Number LTPP-PROJ-0000200 Time- and Load-Dependent Portland Cement Concrete Material Properties
N/A to N/A	$400000 Status: Proposed 2F3

Problem Statement Number LTPP-PROJ-0000201 Short- and Long-Term Variability of the Apshalt Concrete Layer Properties
N/A to N/A	$250000 Status: Proposed 2F4

Problem Statement Number LTPP-PROJ-0000202 Assessment of Changes in Pavement Friction Levels With Time and Loading
N/A to N/A	$400000 Status: Proposed 2F5

Priorities

Critical - 12 Very High - 12 High - 7 Sequence 321

Objective 3: Determination of environmental effects in pavement design and performance prediction

Characterization of temporal variations in pavements. A - Critical

NCHRP 9-23 Environmental Effects in Pavement Mix and Structural Design Systems
2/27/2001 to 12/31/2007	$487234 Status: Completed 3A1

NCHRP 20-50(7/12)ETG Daily and Seasonal Variations in In Situ Material Properties
2/7/2000 to 8/31/2003	$349969 Status: Completed 3A2

FHWA LTPP-PROJ-0000044 Study of Long-Term Pavement Performance Pavement Temperatures
10/1/1998 to 11/1/1999	$94000 Status: Completed 3A3

FHWA LTPP-PROJ-0000045 Analysis of Time Domain Reflectometry Data
8/1/1997 to 7/1/1998	$103056 Status: Completed 3A4

FHWA LTPP-PROJ-0000046 Long-Term Pavement Performance Computed Parameter: Moisture Content
7/1/2005 to 12/31/2007	$265477 Status: Completed 3A5

FHWA LTPP-PROJ-0000047 Seasonal Variations in the Moduli of Unbound Pavement Layers
5/1/1997 to 3/31/2000	$0 Status: Completed 3A6

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 3A7

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 3A8

FHWA LTPP-PROJ-0000049 Assessment and Simplification of Pavement Environmental Effects Models on Pavement Performance
N/A to N/A	$350000 Status: Programmed 3A9

Problem Statement Number LTPP-PROJ-0000050 Seasonal Variations in Moduli of Unbound Pavement Layers
N/A to N/A	$650000 Status: Proposed 3A10

Problem Statement Number LTPP-PROJ-0000051 Seasonal Variations in Backcalculated Moduli of Asphalt-Bound Pavement Layers
N/A to N/A	$225000 Status: Proposed 3A11

Problem Statement Number LTPP-PROJ-0000052 Determination of Frost Penetration in Long-Term Pavement Performance Test Sections and Other Instrumented Sites
N/A to N/A	$100000 Status: Proposed 3A12

Problem Statement Number LTPP-PROJ-0000053 Impact of Management and Rehabilitation Treatments on Temporal Variations in Pavement Materials
N/A to N/A	$1200000 Status: Proposed 3A13

Problem Statement Number LTPP-PROJ-0000054 Assess the Adequacy of the Available Long-Term Pavement Performance Data to Support Conclusions Concerning the Implications of Construction Variability for Pavement Susceptibility to Environmentally Induced Variations
N/A to N/A	$175000 Status: Proposed 3A14

Problem Statement Number LTPP-PROJ-0000055 Quantify the Impact of Construction Variability on Pavement Susceptibility to Environmentally Induced Variations
N/A to N/A	$350000 Status: Proposed 3A15

Impact of long-term environmental effects on pavement layer characteristics and performance. B - Very High

NCHRP 10-66 Predicting Inservice Performance of Flexible Pavements from Accelerated Pavement Testing
3/4/2004 to 10/31/2005	$100000 Status: Completed 3B1

FHWA LTPP-PROJ-0000057 Determination of Frost Penetration in Long-Term Pavement Performance Sections
8/1/1997 to 7/1/1998	$98922 Status: Completed 3B2

FHWA LTPP-PROJ-0000058 Long-Term Pavement Performance Computed Parameter: Frost Penetration
7/1/2005 to 6/30/2008	$199819 Status: Completed 3B3

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 3B4

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
N/A to N/A	$200000 Status: Proposed 3B5

Problem Statement Number LTPP-PROJ-0000061 Environmentally Induced Changes and Degradation
N/A to N/A	$200000 Status: Proposed 3B6

Recommendations for data collection to adequately consider temporal variations in predicting pavement performance. C - Critical

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 3C1

FHWA FHWA-PROJ-14-0129 Increase in Roughness Due to Environmental Factors in Flexible Pavements
7/23/2014 to 1/23/2017	$208583 Status: Active 3C2

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 3C3

FHWA LTPP-PROJ-0000063 Mining Long-Term Pavement Performance Data to Develop Guidelines on Temporal Aspects of Pavement Performance Monitoring Measurements
N/A to N/A	$450000 Status: Programmed 3C4

Problem Statement Number LTPP-PROJ-0000064 Identification of the True Critical Variables for Understanding Temporal Variations in Pavements
N/A to N/A	$350000 Status: Proposed 3C5

Quantify the relative impacts of environmental factors and traffic loading on pavement performance. D - Very High

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 3D1

Problem Statement Number LTPP-PROJ-0000066 Assess and Quantify the Effects of Traffic Loading, Environment, and Their Interaction on Pavement Life
N/A to N/A	$500000 Status: Proposed 3D2

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
N/A to N/A	$200000 Status: Proposed 3D3

Priorities

Critical - 20 Very High - 9 High - 0 Sequence 321

Objective 4: Evaluation and use of pavement condition data in pavement management

Data collection cost effectiveness. A - Very High

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 4A1

FHWA LTPP-PROJ-0000069 Assessment of Long-Term Pavement Performance Friction Data
8/1/1997 to 7/1/1998	$55838 Status: Completed 4A2

FHWA LTPP-PROJ-0000070 Study of Long-Term Pavement Performance Distress Data Variability
1/1/1997 to 12/1/1998	$100000 Status: Completed 4A3

FHWA LTPP-PROJ-0000071 Distress Data Consolidation
8/15/1998 to 12/31/2000	$141000 Status: Completed 4A4

FHWA LTPP-PROJ-0000072 Long-Term Pavement Performance Profile Variability
7/28/1997 to 3/1/2000	$397000 Status: Completed 4A5

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 4A6

FHWA LTPP-PROJ-0000074 Characterization of Transverse Profiles
7/28/1997 to 9/1/2000	$196000 Status: Completed 4A7

FHWA LTPP-PROJ-0000075 Pavement Smoothness Index Relationships
2/1/2001 to 11/1/2001	$60000 Status: Completed 4A8

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 4A9

Problem Statement Number LTPP-PROJ-0000077 Develop Hierarchical Data Collection for Accurate Network- and Project-Level Pavement Management Considering Types and Frequency of Measurements
N/A to N/A	$400000 Status: Proposed 4A10

Quality of data. B - Very High

NCHRP 20-05/Topic 39-01 Quality Management of Pavement Distress Data Collection
10/1/2007 to 9/30/2008	$30000 Status: Completed 4B1

FHWA LTPP-PROJ-0000079 Study of Long-Term Pavement Performance Pavement Deflections
4/1/2001 to 9/1/2001	$100000 Status: Completed 4B2

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 4B3

Problem Statement Number LTPP-PROJ-0000080 Analysis of Long-Term Pavement Performance Friction Data
N/A to N/A	$100000 Status: Proposed 4B4

Problem Statement Number LTPP-PROJ-0000081 Quantitative Information of Environmental Variables on Pavement Performance Measures
N/A to N/A	$500000 Status: Proposed 4B5

FHWA LTPP-PROJ-0000082 Quality Management Procedures for Network Level Pavement Condition Data
10/1/2011 to 2/28/2013	$149193 Status: Completed 4B6

History of advances in measures. C - Very High

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 4C1

Problem Statement Number LTPP-PROJ-0000083 Update of Pavement Smoothness Index Relationship
N/A to N/A	$150000 Status: Proposed 4C2

FHWA LTPP-PROJ-0000084 Estimate Long-Term Pavement Performance Faulting Data Using Profile Measurements
11/1/2012 to 11/1/2014	$0 Status: Completed 4C3

Problem Statement Number LTPP-PROJ-0000085 Synthesis of Current Pavement Condition Data Collection Practice
N/A to N/A	$75000 Status: Proposed 4C4

Problem Statement Number LTPP-PROJ-0000086 Guidelines for Transitioning From One Technology to Another
N/A to N/A	$500000 Status: Proposed 4C5

Data management. D - High

NCHRP 20-05/Topic10-05 Collection and Use of Pavement Condition Data
N/A to N/A	$0 Status: Completed 4D1

NCHRP 20-50(9)ETG Feasibility of Using Falling Weight Deflectometer Deflection Data to Characterize Pavement Construction Quality
5/2/2000 to 6/3/2002	$174996 Status: Completed 4D2

Problem Statement Number LTPP-PROJ-0000089 Lessons Learned From Long-Term Pavement Performance Condition Data Development
N/A to N/A	$100000 Status: Proposed 4D3

Problem Statement Number LTPP-PROJ-0000090 Identify the Best Format for Use of Pavement Condition Data in an Integrated Delivery System
N/A to N/A	$150000 Status: Proposed 4D4

Priorities

Critical - 0 Very High - 21 High - 4 Sequence 321

Objective 5: Development of pavement response and performance models applicable to pavement design and performance prediction

Guidelines for selection of appropriate load-response models for use in pavement design as a function of the acceptable level of risk and model complexity. A - Very High

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 5A1

NCHRP 1-46 Handbook for Pavement Design, Construction, and Management
10/1/2009 to 12/31/2011	$400000 Status: Completed 5A2

NCHRP 1-47 Sensitivity Evaluation of Mechanistic-Empirical Pavement Design Guide Performance Prediction
9/2/2009 to 12/31/2011	$0 Status: Completed 5A3

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 5A4

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 5A5

Problem Statement Number LTPP-PROJ-0000095 Evaluation of Load-Response Models (Axle Load and Environment)
N/A to N/A	$200000 Status: Proposed 5A6

Problem Statement Number LTPP-PROJ-0000096 Effect of Multiple Axle Group Loading on Pavement Performance
N/A to N/A	$1500000 Status: Proposed 5A7

Problem Statement Number LTPP-PROJ-0000097 Development of Alternative Computational Tools to Enhance Model Response (After NCHRP 1-47)
N/A to N/A	$450000 Status: Proposed 5A8

Problem Statement Number LTPP-PROJ-0000098 Use of Energy Density Methods to Predict Pavement Response
N/A to N/A	$700000 Status: Proposed 5A9

Mechanistic-empirical procedures for using commonly collected pavement data to predict specific distresses. B - Very High

NCHRP 20-50(5)ETG Variations in Pavement Design Inputs
10/13/1999 to 10/12/2001	$249991 Status: Completed 5B1

Problem Statement Number LTPP-PROJ-0000100 Evaluation of the Performance Prediction Models in the Mechanistic-Empirical Pavement Design Guide
N/A to N/A	$400000 Status: Proposed 5B2

FHWA LTPP-PROJ-0000208 Using Multiobjective Optimization to Enhance Calibration of Performance Models in the Mechanistic-Empirical Pavement Design Guide
7/28/2014 to 3/31/2017	$115404 Status: Active 5B3

Calibrated relationships (transfer functions) between pavement response and individual distress types. C - Very High

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 5C1

FHWA LTPP-PROJ-0000102 Design and Construction of Portland Cement Concrete Pavements, Volume I
10/1/1994 to 8/1/1998	$84000 Status: Completed 5C2

FHWA LTPP-PROJ-0000103 Design and Construction of Portland Cement Concrete Pavements, Volume II
10/1/1994 to 8/1/1998	$84000 Status: Completed 5C3

FHWA LTPP-PROJ-0000104 Design and Construction of Portland Cement Concrete Pavements, Volume III
10/1/1994 to 8/1/1998	$84000 Status: Completed 5C4

NCHRP 1-41 Models for Predicting Reflection Cracking of Hot-Mix Asphalt Overlays
2/3/2005 to 2/26/2010	$500000 Status: Completed 5C5

NCHRP 1-42 Top-Down Fatigue Cracking of Hot-Mix Asphalt Layers – Phase I
8/22/2003 to 2/28/2005	$39556 Status: Completed 5C6

NCHRP 1-52 A Mechanistic-Empirical Model for Top-Down Cracking of Asphalt Pavement Layers
3/4/2013 to 9/30/2016	$500000 Status: Active 5C7

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 5C8

Problem Statement Number LTPP-PROJ-0000109 Evaluation of Pavement Performance Models – Filling in the Gap with National Cooperative Highway Research Program 1-41 (after NCHRP 1-41)
N/A to N/A	$200000 Status: Proposed 5C9

Problem Statement Number LTPP-PROJ-0000110 Development of Longitudinal Cracking Models for Portland Cement Concrete Pavements (after NCHRP 1-42)
N/A to N/A	$200000 Status: Proposed 5C10

Problem Statement Number LTPP-PROJ-0000111 Revise Modeling of Fatigue Cracking to be a Fracture and Healing Process
N/A to N/A	$900000 Status: Proposed 5C11

Problem Statement Number LTPP-PROJ-0000112 Implementation of National Cooperative Highway Research Program 1-41, Reflection Cracking Design Program
N/A to N/A	$760000 Status: Proposed 5C12

Problem Statement Number LTPP-PROJ-0000113 Incorporating Top-Down Longitudinal Cracking Into Mechanistic-Empirical Pavement Design Guide
N/A to N/A	$750000 Status: Proposed 5C13

Problem Statement Number LTPP-PROJ-0000114 Development of Transfer Functions for Spalling, Faulting, Raveling, and Thermal Cracking Along With Calibration and Validation
N/A to N/A	$0 Status: Proposed 5C14

FHWA LTPP-PROJ-0000207 LTPP Computed Parameter: Top-Down Cracking
7/21/2014 to 9/20/2017	$239099 Status: Active 5C15

Impact of pavement roughness on the dynamic loads applied to pavements. D - High

Problem Statement Number LTPP-PROJ-0000115 Coupling Vehicle Dynamics and Pavement Performance Prediction Models (Coordinate with 4C1)
N/A to N/A	$375000 Status: Proposed 5D1

Validation of pavement response and performance prediction models. E - High

FHWA FHWA-PROJ-10-0006 National Forensic Workshop and Forensic Guidelines
2/1/2010 to 3/1/2013	$125000 Status: Completed 5E1

NCHRP 1-49 Guidelines for Conducting Forensic Investigation of Highway Pavements
4/7/2010 to 12/30/2012	$499999 Status: Completed 5E2

Problem Statement Number LTPP-PROJ-0000117 Forensic Investigation of SPS-9 in Connecticut
N/A to N/A	$20000 Status: Proposed 5E3

Response models for construction quality control. F - High

Problem Statement Number LTPP-PROJ-0000118 Asphalt Mixture Composition From Ground Penetrating Radar Signal Analysis
N/A to N/A	$0 Status: Proposed 5F1

Problem Statement Number LTPP-PROJ-0000119 Concrete Mixture Composition From Ground Penetrating Radar Signal Analysis
N/A to N/A	$0 Status: Proposed 5F2

Problem Statement Number LTPP-PROJ-0000120 Base Course Mixture Composition From Ground Penetrating Radar Signal Analysis
N/A to N/A	$0 Status: Proposed 5F3

Problem Statement Number LTPP-PROJ-0000121 Subgrade Mixture Composition from Ground Penetrating Radar Signal Analysis
N/A to N/A	$0 Status: Proposed 5F4

Problem Statement Number LTPP-PROJ-0000122 Constitutive Model of Complex Modulus of Asphalt From Ground Penetrating Radar Composition and Calibrated to Falling Weight Deflectometer Measurements
N/A to N/A	$0 Status: Proposed 5F5

Problem Statement Number LTPP-PROJ-0000123 Constitutive Model of Concrete From Ground Penetrating Radar Composition and Calibrated to Falling Weight Deflectometer Measurements
N/A to N/A	$0 Status: Proposed 5F6

Problem Statement Number LTPP-PROJ-0000124 Constitutive Model of Unbound, Modified, and Stabilized Base Course From Ground Penetrating Radar Composition and Calibrated to Falling Weight Deflectometer Measurements
N/A to N/A	$0 Status: Proposed 5F7

Problem Statement Number LTPP-PROJ-0000125 Expected Asphalt Fatigue Life, Risk, and Reliability Prediction From Ground Penetrating Radar/Falling Weight Deflectometer Inputs
N/A to N/A	$0 Status: Proposed 5F8

Problem Statement Number LTPP-PROJ-0000126 Expected Asphalt Rutting Life, Risk, and Reliability Prediction From Ground Penetrating Radar/Falling Weight Deflectometer Inputs
N/A to N/A	$0 Status: Proposed 5F9

Problem Statement Number LTPP-PROJ-0000127 Reconsideration of Asphalt Pay, Incentive, and Penalty Factors from Ground Penetrating Radar/Falling Weight Deflectometer Inputs
N/A to N/A	$0 Status: Proposed 5F10

Problem Statement Number LTPP-PROJ-0000128 Evaluation of Aggregate Absorptivity and Its Impact on Concrete Performance
N/A to N/A	$175000 Status: Proposed 5F11

Problem Statement Number LTPP-PROJ-0000129 Use of Nondestructive Evaluation on Construction Risk Assessment
N/A to N/A	$675000 Status: Proposed 5F12

Priorities

Critical - 0 Very High - 27 High - 16 Sequence 321

Objective 6: Maintenance and rehabilitation strategy selection and performance prediction

Up-to-date LTPP maintenance and rehabilitation data validated for analysis use. A - Critical

NCHRP 20-50(3/4)ETG Effectiveness of Maintenance and Rehabilitation Options
10/14/1999 to 3/31/2002	$250000 Status: Completed 6A1

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 6A2

FHWA LTPP-PROJ-0000132 Assessment of the SPS-7 Bonded Concrete Overlays Experiment
7/1/1999 to 12/1/2000	$25433 Status: Completed 6A3

FHWA LTPP-PROJ-0000133 Long-Term Pavement Performance Maintenance and Rehabilitation Data Review
7/1/1999 to 4/1/2000	$54000 Status: Completed 6A4

Problem Statement Number LTPP-PROJ-0000134 Review and Validation of Long-Term Pavement Performance Maintenance and Rehabilitation Data
N/A to N/A	$100000 Status: Proposed 6A5

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
N/A to N/A	$180000 Status: Proposed 6A6

Efficacy and performance prediction for pavement maintenance and rehabilitation options. B - Critical

NCHRP 1-38 Guide on Pavement Rehabilitation Strategies
3/1/1999 to 3/31/2001	$100000 Status: Completed 6B1

NCHRP 14-14 Guide for Optimal Timing of Pavement Preventive Maintenance Treatment Applications
4/10/2000 to 9/30/2003	$312397 Status: Completed 6B2

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: Active 6B3

FHWA LTPP-PROJ-0000139 Consequences of Deferred Treatment of Pavement Preservation Treatment Placement on Asphalt Concrete, Portland Cement Concrete and Composite Pavement Structures
N/A to N/A	$425000 Status: Programmed 6B4

Guidelines for optimal timing of pavement maintenance and rehabilitation treatments. C - High

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
N/A to N/A	$250000 Status: Proposed 6C1

Problem Statement Number LTPP-PROJ-0000141 Development of Cost-Effective Combinations of Scheduled Maintenance and Rehabilitation Treatments Over Long-Life Pavement Design Periods
N/A to N/A	$375000 Status: Proposed 6C2

Problem Statement Number LTPP-PROJ-0000142 Development of Optimal Distress Threshold Triggers for Unscheduled Rehabilitation Treatments
N/A to N/A	$250000 Status: Proposed 6C3

Selection of timely and effective maintenance and rehabilitation activities D - High

NCHRP 9-40 Optimization of Tack Coat for Hot-Mix Asphalt Placement
7/1/2005 to 12/31/2011	$428000 Status: Completed 6D1

Problem Statement Number LTPP-PROJ-0000144 Determine the Effect of Repair Techniques on the Performance of Subsequent Hot-Mix Asphalt Overlays
N/A to N/A	$250000 Status: Proposed 6D2

Problem Statement Number LTPP-PROJ-0000145 Cost Effectiveness of Maintenance and Rehabilitation Design Features
N/A to N/A	$150000 Status: Proposed 6D3

Problem Statement Number LTPP-PROJ-0000146 Selection of Optimal Rehabilitation Techniques for Existing Conditions
N/A to N/A	$200000 Status: Proposed 6D4

Problem Statement Number LTPP-PROJ-0000147 Methodology to Enable Development of Long-Term Rehabilitation and Maintenance Schedules
N/A to N/A	$750000 Status: Proposed 6D5

Priorities

Critical - 10 Very High - 0 High - 8 Sequence 321

Objective 7: Quantification of the performance impact of specific design features

Impact of design features on measured pavement responses (deflections, load-transfer, strains, etc.) A - Critical

NCHRP 20-50(2)ETG Relative Performance of Jointed Plain Concrete Pavements With Sealed and Unsealed Joints
7/29/1999 to 1/31/2001	$74963 Status: Completed 7A1

FHWA LTPP-PROJ-0000149 Review of SPS-1, -2, -5, and -6 Experiments
7/12/1999 to 12/31/2000	$360000 Status: Completed 7A2

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 7A3

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 7A4

FHWA LTPP-PROJ-0000152 Evaluation of Joint and Crack Load Transfer
3/1/2001 to 1/1/2002	$75000 Status: Completed 7A5

NCHRP 20-50(10/16) 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 7A6

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 7A7

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 7A8

Problem Statement Number LTPP-PROJ-0000155 Impact of Design Features on New and Rehabilitated Flexible Pavements
N/A to N/A	$200000 Status: Proposed 7A9

Problem Statement Number LTPP-PROJ-0000156 Assessment of Data Availability to Support Analysis of Design Features
N/A to N/A	$250000 Status: Proposed 7A10

Impact of design features on pavement distress. B - Very High

NCHRP 1-34A Contributions of Pavement Structural Layers to Rutting of Flexible Pavements
6/18/1999 to 7/31/2001	$149923 Status: Completed 7B1

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 7B2

NCHRP 1-34C Effects of Subsurface Drainage on Performance of Asphalt and Concrete Pavements
4/6/2000 to 3/31/2003	$116924 Status: Completed 7B3

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 7B4

NCHRP 20-50(8/13)ETG Factors Affecting Pavement Smoothness
10/25/1999 to 12/30/2001	$199998 Status: Completed 7B5

FHWA LTPP-PROJ-0000162 Investigation of Development of Pavement Roughness
6/1/1995 to 8/1/1997	$194534 Status: Completed 7B6

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 7B7

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 7B8

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 11/10/2016	$249990 Status: Active 7B9

Problem Statement Number LTPP-PROJ-0000165 Quantify the Impact of Asphalt Concrete Pavement Design Features on Measured Pavement Distresses
N/A to N/A	$300000 Status: Proposed 7B10

Problem Statement Number LTPP-PROJ-0000166 Quantify the Impact of Rigid Pavement Design Features on Measured Pavement Distresses
N/A to N/A	$300000 Status: Proposed 7B11

Problem Statement Number LTPP-PROJ-0000167 Quantify the Impact of Design Features on Measured Distresses for Rehabilitated Flexible Pavements
N/A to N/A	$300000 Status: Proposed 7B12

Problem Statement Number LTPP-PROJ-0000168 Quantify the Impact of Design Features on Measured Distresses for Rehabilitated Rigid Pavements
N/A to N/A	$300000 Status: Proposed 7B13

Problem Statement Number LTPP-PROJ-0000169 Evaluation and Characterization of Pavement Drainage (after NCHRP 1-34D)
N/A to N/A	$400000 Status: Proposed 7B14

Problem Statement Number LTPP-PROJ-0000170 Common Characteristics of Good and Poorly Performing Asphalt Concrete and Portland Cement Concrete Pavements
N/A to N/A	$300000 Status: Proposed 7B15

Problem Statement Number LTPP-PROJ-0000171 Factors Affecting Pavement Smoothness/Roughness
N/A to N/A	$250000 Status: Proposed 7B16

Guidelines for the selection of pavement design features. C - High

Problem Statement Number LTPP-PROJ-0000172 Guidelines for the Selection of Pavement Design Features
N/A to N/A	$250000 Status: Proposed 7C1

Priorities

Critical - 10 Very High - 16 High - 1 Sequence 321

Objective 8: Analyses supporting and enhancing the use of the ME-PDG

Implementation of the ME-PDG using LTPP data. A - High

NCHRP 20-07/Task 106 Thermal Movement Design Procedure for Concrete
1/1/1999 to 6/2/2002	$30000 Status: Completed 8A1

NCHRP 1-32 Systems for Design of Highway Pavements
2/1/1994 to 11/11/1997	$500000 Status: Completed 8A2

FHWA FHWA-PROJ-14-0126 Characterizing Existing Hot-Mix Asphalt Layer Damage for Mechanistic Pavement Rehabilitation Design
7/21/2014 to 1/21/2017	$249771 Status: Active 8A3

Problem Statement Number LTPP-PROJ-0000175 Creation of Mechanistic-Empirical Pavement Design Guide Subdatabase of Most Complete Datasets That Can Be Used for Analysis (After the Release of DARWin-ME and To Be Combined with 8B1)
N/A to N/A	$300000 Status: Proposed 8A4

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
N/A to N/A	$400000 Status: Proposed 8A5

Problem Statement Number LTPP-PROJ-0000177 Update Default Values
N/A to N/A	$250000 Status: Proposed 8A6

Problem Statement Number LTPP-PROJ-0000178 States Need Local Data for Items Like Coefficient of Thermal Expansion, Dynamic Modulus, Resilient Modulus of Unbound Layers
N/A to N/A	$0 Status: Proposed 8A7

Problem Statement Number LTPP-PROJ-0000179 Traffic Data Sensitivity of Hourly Versus Daily Data
N/A to N/A	$0 Status: Proposed 8A8

Problem Statement Number LTPP-PROJ-0000180 How to Evaluate Whether Added Climate Data Are Needed
N/A to N/A	$0 Status: Proposed 8A9

Problem Statement Number LTPP-PROJ-0000181 Reevaluate Validity of Models and Provide Periodic Updates to Models or Calibrations
N/A to N/A	$0 Status: Proposed 8A10

Problem Statement Number LTPP-PROJ-0000182 Benefits of Design Features Captured Adequately in Mechanistic-Empirical Models
N/A to N/A	$0 Status: Proposed 8A11

Problem Statement Number LTPP-PROJ-0000183 Developing Pavement Catalogs
N/A to N/A	$400000 Status: Proposed 8A12

FHWA LTPP-PROJ-0000206 Effect of Dowel Misalignment on Concrete Pavement Performance
5/9/2014 to 6/8/2017	$274773.71 Status: Active 8A13

B. Future improvements to the ME-PDG. B - High

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 8B1

Problem Statement Number LTPP-PROJ-0000185 Re-examination of Distress Types in Long-Term Pavement Performance Versus Mechanistic-Empirical Pavement Design Guide
N/A to N/A	$150000 Status: Proposed 8B2

Problem Statement Number LTPP-PROJ-0000186 New Models Related to Design Features
N/A to N/A	$400000 Status: Proposed 8B3

Problem Statement Number LTPP-PROJ-0000187 Cracking Mechanisms
N/A to N/A	$0 Status: Proposed 8B4

Problem Statement Number LTPP-PROJ-0000188 New Models Related to Distress Prediction
N/A to N/A	$400000 Status: Proposed 8B5

Problem Statement Number LTPP-PROJ-0000189 Changes in Material Properties Over Time (e.g. bases)
N/A to N/A	$750000 Status: Proposed 8B6

Problem Statement Number LTPP-PROJ-0000190 Guidance on the Use of Long-Term Pavement Performance Data for the Mechanistic-Empirical Pavement Design Guide by Non-State Agency Users (i.e. consultants, contractors, associations, local governments, academics, international)
N/A to N/A	$0 Status: Proposed 8B7

Priorities

Critical - 0 Very High - 0 High - 20 Sequence 321

Objective 9: Comprehensive use of LTPP to improve the management of pavement assets

Network level assessment and program development. A - High

FHWA FHWA-PROJ-14-0008 Validation of Pavement Performance Measures
5/1/2014 to 4/30/2017	$291743 Status: Active 9A1

FHWA FHWA-PROJ-14-0021 Using Long-Term Pavement Performance Program Distress Data to Support Performance-Based Reporting
5/9/2014 to 5/8/2017	$159788 Status: Active 9A2

Problem Statement Number LTPP-PROJ-0000191 Life-Cycle Cost Analysis – Develop Improved Pavement Performance Default Values or Models for Life-Cycle Cost Determination
N/A to N/A	$150000 Status: Proposed 9A3

Problem Statement Number LTPP-PROJ-0000192 Numerical Pavement Evaluation Indices for Pavement Condition (Summary Condition Index)
N/A to N/A	$200000 Status: Proposed 9A4

Pavement rehabilitation/design. B - High

Construction quality. C - High

Problem Statement Number LTPP-PROJ-0000193 Criteria for Applying Performance Measures to Construction Quality Evaluation
N/A to N/A	$150000 Status: Proposed 9C1

Maintenance and preservation. D - High

NCHRP 1-48 Incorporating Pavement Preservation Into the Mechanistic-Empirical Pavement Design Guide
7/26/2010 to 12/31/2013	$262124 Status: Completed 9D1

Problem Statement Number LTPP-PROJ-0000195 Applying Long-Term Pavement Performance Data to Pavement Preservation Roadmap
N/A to N/A	$150000 Status: Proposed 9D2

Tools/guidelines for characterizing material properties. E - High

Problem Statement Number LTPP-PROJ-0000196 Long-Term Pavement Performance Lessons Learned on Management, Design, and Data Variability in Very Large Research Projects
N/A to N/A	$600000 Status: Proposed 9E1

Problem Statement Number LTPP-PROJ-0000197 Material Characteristics for Pavement Design (Moved from 2E1 v2)
N/A to N/A	$250000 Status: Proposed 9E2

Priorities

Critical - 0 Very High - 0 High - 9 Sequence 321

Long-Term Pavement Performance Data Analysis Program

Strategic Plan Objectives, Analysis Outcomes, and Supporting Project

Objective

Priorities

Critical
Very High
High
Sequence123

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.

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