Long-Term Pavement Performance Data Analysis Program

Strategic Plan Objectives, Analysis Outcomes, and Supporting Projects

Objective 1 Objective 2 Objective 3 Objective 4 Objective 5 Objective 6 Objective 7 Objective 8 Objective 9

Traffic characterization and prediction Materials characterization Determination of environmental effects in Evaluation and use of pavement condition Development of pavement response and Maintenance and rehabilitation strategy Quantification of the performance impact of Analyses supporting and enhancing the Comprehensive use of LTPP to improve the

pavement design and performance data in pavement management performance models applicable to selection and performance prediction specific design features use of the ME-PDG management of pavement assets

prediction pavement design and performance

prediction 

A A A A A A A A A

Critical Critical Critical Very Guidelines for selection of appropriate load-response models for use in pavement Very Critical Critical Implementation of the ME-PDG 

using LTPP data.

High Network level assessment and program 

development.

High Data collection cost effectiveness. High design as a function of the acceptable level of risk and model complexity. High

1 1 2 1 1 1 1

1 1

NCHRP 1-39 NCHRP 20-50(14) NCHRP 9-23 NCHRP 20-50(3/4) NCHRP 20-50(2) NCHRP 20-07/Task 106 FHWA FHWA-PROJ-14-0008

Traffic Data Collection, Analysis, and Forecasting for Mechanistic Pavement Design Significance of As-Constructed Asphalt Concrete Air Voids to Pavement Performance Environmental Effects in Pavement Mix and Structural Design Systems NCHRP 1-35A NCHRP 1-37A Effectiveness of Maintenance and Rehabilitation Options Relative Performance of Jointed Plain Concrete Pavements With Sealed and Unsealed Thermal Movement Design Procedure for Concrete Validation of Pavement Performance Measures

Guide for Pavement Management: American Association of State Highway and Development of the 2002 Guide for the Design of New and Rehabilitated Pavement Joints $500000 $100000 $487234 $250000 $30000 $291743 Transportation Officials Pavement Management Guide Structures (Phase II) Completed Completed Completed Completed $74963 Completed Active

1A1 2A1 3A1 $200000 $6579080 6A1 Completed 8A1 5/1/14 to 4/30/17 9A1

Completed Completed 7A1

4A1 5A1 FHWA LTPP-PROJ-0000002 NCHRP 9-49A NCHRP 20-50(7/12) FHWA LTPP-PROJ-0000131 NCHRP 1-32 FHWA FHWA-PROJ-14-0021

Long-Term Pavement Performance Weigh-in-Motion Approach Smoothness Performance of Warm-Mix Asphalt Technologies: Stage II  Long-Term Field Daily and Seasonal Variations in In Situ Material Properties Performance of Rehabilitated Asphalt Concrete Pavements in the Long-Term Pavement FHWA LTPP-PROJ-0000149 Systems for Design of Highway Pavements  Using Long-Term Pavement Performance Program Distress Data to Support

Specifications Performance FHWA LTPP-PROJ-0000069 NCHRP 1-46 Performance Experiments Review of SPS-1, -2, -5, and -6 Experiments Performance-Based Reporting $349969 $500000 Assessment of Long-Term Pavement Performance Friction Data Handbook for Pavement Design, Construction, and Management $0 $900000 Completed $54000 $360000 Completed $159788

Completed Active 3A2 $55838 $400000 Completed Completed 8A2 Active

1/1/00 to 11/1/05 1A2 4/29/11 to 9/30/16 2A2 Completed Completed 10/1/97 to 8/1/99 6A2 7/12/99 to 12/31/00 7A2 5/9/14 to 5/8/17 9A2

8/1/97 to 7/1/98 4A2 5A2 FHWA LTPP-PROJ-0000044 FHWA FHWA-PROJ-14-0126

FHWA LTPP-PROJ-0000204 FHWA LTPP-PROJ-0000019 Study of Long-Term Pavement Performance Pavement Temperatures FHWA LTPP-PROJ-0000132 FHWA LTPP-PROJ-0000150 Characterizing Existing Hot-Mix Asphalt Layer Damage for Mechanistic Pavement Problem Statement Number LTPP-PROJ-0000191

Refinement of Pavement Smoothness Requirements for WIM Systems Assessment of Selected Long-Term Pavement Performance Material Data Tables and FHWA LTPP-PROJ-0000070 NCHRP 1-47 Assessment of the SPS-7 Bonded Concrete Overlays Experiment Evaluation and Analysis of Long-Term Pavement Performance Pavement Layer Rehabilitation Design Life-Cycle Cost Analysis  Develop Improved Pavement Performance Default Values or $94000 Development of Representative Test Tables  Volume I Study of Long-Term Pavement Performance Distress Data Variability Sensitivity Evaluation of Mechanistic-Empirical Pavement Design Guide Performance Thickness Data Models for Life-Cycle Cost Determination $0 Completed $25433 $249771 Prediction Completed $243000 10/1/98 to 11/1/99 3A3 $100000 Completed $191000 Active $150000

10/1/09 to 8/1/12 1A3 Completed Completed $0 7/1/99 to 12/1/00 6A3 Completed 7/21/14 to 1/21/17 8A3 Proposed

9/1/99 to 3/1/01 2A3 1/1/97 to 12/1/98 4A3 Completed 9/1/99 to 12/31/00 7A3 1/1/00 to 1/1/00 9A3 FHWA LTPP-PROJ-0000045 5A3 FHWA FHWA-PROJ-09-0046 Analysis of Time Domain Reflectometry Data FHWA LTPP-PROJ-0000133 Problem Statement Number LTPP-PROJ-0000175

Verification, Refinement, and Applicability of Long-Term Pavement Performance FHWA LTPP-PROJ-0000020 FHWA LTPP-PROJ-0000071 Long-Term Pavement Performance Maintenance and Rehabilitation Data Review FHWA LTPP-PROJ-0000151 Creation of Mechanistic-Empirical Pavement Design Guide Subdatabase of Most Problem Statement Number LTPP-PROJ-0000192 $103056 (LTPP) Classification Scheme Study of Long-Term Pavement Performance Laboratory Resilient Modulus Test Data Distress Data Consolidation FHWA LTPP-PROJ-0000094 Study of Environmental Effects in the Absence of Heavy Loads, SPS-8  Initial Complete Datasets That Can Be Used for Analysis (After the Release of DARWin-ME Numerical Pavement Evaluation Indices for Pavement Condition (Summary Condition Completed $54000 and Response Characteristics Comparison and Quality Evaluation of Long-Term Pavement Performance Dynamic Evaluation and Analysis and To Be Combined with 8B1) Index) $249977 8/1/97 to 7/1/98 3A4 $141000 Completed Load Response Data From Ohio and North Carolina Completed $27000 Completed 7/1/99 to 4/1/00 6A4 $75000 $300000 $200000

9/30/09 to 12/31/12 1A4 Completed 8/15/98 to 12/31/00 4A4 $50000 Completed Proposed Proposed FHWA LTPP-PROJ-0000046 6/1/00 to 4/30/01 2A4 Completed 3/1/01 to 1/1/02 7A4 1/1/00 to 1/1/00 8A4 1/1/00 to 1/1/00 9A4 Long-Term Pavement Performance Computed Parameter: Moisture Content Problem Statement Number LTPP-PROJ-0000134 12/1/99 to 12/1/00 5A4 FHWA LTPP-PROJ-0000004 FHWA LTPP-PROJ-0000072 Review and Validation of Long-Term Pavement Performance Maintenance and $265477 Develop Tools to Improve Accuracy of Traffic Loading Data Collection FHWA LTPP-PROJ-0000021 Long-Term Pavement Performance Profile Variability Rehabilitation Data FHWA LTPP-PROJ-0000152 Problem Statement Number LTPP-PROJ-0000176 Completed Long-Term Pavement Performance Computed Parameter: Dynamic Modulus (E*) FHWA LTPP-PROJ-0000205 Evaluation of Joint and Crack Load Transfer State Data vs. Long-Term Pavement Performance Data Since Long-Term Pavement $350000 7/1/05 to 12/31/07 3A5 $397000 $100000 LTPP Ohio SPS-1 and 2 Dynamic Load Response Data Processing Performance Units and Protocols Were Used in Mechanistic-Empirical Pavement Design Programmed $316751 Completed Proposed $75000 Guide 1/1/00 to 1/1/00 1A5 Completed 7/28/97 to 3/1/00 4A5 $0 1/1/00 to 1/1/00 6A5 Completed FHWA LTPP-PROJ-0000047 8/17/07 to 9/30/09 2A5 Completed 3/1/01 to 1/1/02 7A5 $400000 Seasonal Variations in the Moduli of Unbound Pavement Layers 8/1/11 to 10/1/12 5A5 Proposed B

Problem Statement Number LTPP-PROJ-0000005 FHWA LTPP-PROJ-0000073 Problem Statement Number LTPP-PROJ-0000135 Pavement rehabilitation/design. $0 1/1/00 to 1/1/00 8A5 High Validate Vehicle Simulation Model and Provide Recommendations for Improved Problem Statement Number LTPP-PROJ-0000022 Preliminary Evaluation and Analysis of Long-Term Pavement Performance Faulting Data Determination of Long-Term Pavement Performance Experiment Maturity for Analysis NCHRP 20-50(10/16) Completed Weigh-in-Motion Site Selection and Calibration Effect of Reclaimed Asphalt Pavement and Polymer Modified Asphalt on Pavement in Maintenance and Rehabilitation and Other Strategic Objective Analytical Projects Influence of Design and Construction Features on the Response and Performance of New 5/1/97 to 3/31/00 3A6 $58000 Performance

Problem Statement Number LTPP-PROJ-0000095

Evaluation of Load-Response Models (Axle Load and Environment) Flexible and Rigid Pavements Problem Statement Number LTPP-PROJ-0000177 $750000 Completed $180000 Update Default Values Proposed $150000 5/1/98 to 12/31/98 4A6 $200000 Proposed $299301 FHWA FHWA-PROJ-11-0110 1/1/00 to 1/1/00 1A6 Proposed Proposed 1/1/00 to 1/1/00 6A6 Completed $250000 Evaluation of Long-Term Pavement Performance Program Climatic Data for Use in 1/1/00 to 1/1/00 2A6 1/1/00 to 1/1/00 5A6 7A6 Proposed Mechanistic-Empirical Pavement Design Guide Calibration and Other Pavement Analyses FHWA LTPP-PROJ-0000074 1/1/00 to 1/1/00 8A6 Problem Statement Number LTPP-PROJ-0000006 Characterization of Transverse Profiles $360538 Truck Tire Wander, Pressure, and Width Data Collection Problem Statement Number LTPP-PROJ-0000023 Problem Statement Number LTPP-PROJ-0000096 FHWA LTPP-PROJ-0000154

Performance of Treated Versus Untreated Sections of Unbound Materials Completed $196000 Effect of Multiple Axle Group Loading on Pavement Performance Impact of Design Features on Pavement Response and Performance in Rehabilitated Problem Statement Number LTPP-PROJ-0000178 C $150000 5/18/11 to 12/30/15 3A7 Completed Flexible and Rigid Pavements States Need Local Data for Items Like Coefficient of Thermal Expansion, Dynamic Proposed $0 7/28/97 to 9/1/00 4A7 $1500000 Construction quality.

High Modulus, Resilient Modulus of Unbound Layers 1/1/00 to 1/1/00 1A7 Proposed Proposed $317507

1/1/00 to 1/1/00 2A7 NCHRP 1-40 1/1/00 to 1/1/00 5A7 B Completed $0 Facilitating the Implementation of the Guide for the Design of New and Rehabilitated FHWA LTPP-PROJ-0000075 Critical 8/13/07 to 3/30/10 7A7 Proposed 3

Problem Statement Number LTPP-PROJ-0000007 Pavement Structures Pavement Smoothness Index Relationships 1/1/00 to 1/1/00 8A7 Adding Axle Groupings Beyond Quad Tire Groups to Long-Term Pavement FHWA LTPP-PROJ-0000024 Problem Statement Number LTPP-PROJ-0000097 $650000 $60000 Performance Database Significance of As-Constructed Asphalt Pavement Air Voids to Pavement Performance Development of Alternative Computational Tools to Enhance Model Response (After FHWA FHWA-PROJ-11-0034 Problem Statement Number LTPP-PROJ-0000193 Completed Completed 2 NCHRP 1-47) Environmental Effects in the Absence of Heavy Loads, Specific Pavement Study 8 Problem Statement Number LTPP-PROJ-0000179 Criteria for Applying Performance Measures to Construction Quality Evaluation $30000 $425000 3A8 2/1/01 to 11/1/01 4A8

Traffic Data Sensitivity of Hourly Versus Daily Data Proposed Programmed $450000 $269632 $150000

1/1/00 to 1/1/00 1A8 1/1/00 to 1/1/00 2A8 Proposed NCHRP 1-38 Completed $0 Proposed FHWA LTPP-PROJ-0000049 FHWA LTPP-PROJ-0000076 1/1/00 to 1/1/00 5A8 Guide on Pavement Rehabilitation Strategies 4/20/11 to 5/19/15 7A8 Proposed 1/1/00 to 1/1/00 9C1 Assessment and Simplification of Pavement Environmental Effects Models on Pavement Smoothness Index Differences Related to Long-Term Pavement Performance Equipment $100000 1/1/00 to 1/1/00 8A8 Problem Statement Number LTPP-PROJ-0000008 Problem Statement Number LTPP-PROJ-0000025 Performance Type Completed Collecting Data From Static Scales Version 2: Aggregates and the Performance of Portland Cement Concrete Problem Statement Number LTPP-PROJ-0000098 Problem Statement Number LTPP-PROJ-0000155 $350000 $78437 6B1 Use of Energy Density Methods to Predict Pavement Response Impact of Design Features on New and Rehabilitated Flexible Pavements Problem Statement Number LTPP-PROJ-0000180 $75000 $650000 Programmed Completed How to Evaluate Whether Added Climate Data Are Needed Proposed Proposed 1/1/00 to 1/1/00 3A9 1/6/04 to 4/30/05 4A9 $700000 $200000

1/1/00 to 1/1/00 1A9 1/1/00 to 1/1/00 2A9 Proposed NCHRP 14-14 Proposed $0

1/1/00 to 1/1/00 5A9 Guide for Optimal Timing of Pavement Preventive Maintenance Treatment Applications 1/1/00 to 1/1/00 7A9 Proposed Problem Statement Number LTPP-PROJ-0000050 Problem Statement Number LTPP-PROJ-0000077 1/1/00 to 1/1/00 8A9 D

$312397 Problem Statement Number LTPP-PROJ-0000009 Problem Statement Number LTPP-PROJ-0000026 Seasonal Variations in Moduli of Unbound Pavement Layers Develop Hierarchical Data Collection for Accurate Network- and Project-Level Completed Maintenance and preservation.

High Innovative Cost-Effective Alternatives to Traditional Weigh-in-Motion Calibration Change in Performance Grade Grading Over Time and Effect on Mixture Stiffness and Pavement Management Considering Types and Frequency of Measurements Problem Statement Number LTPP-PROJ-0000156 $650000 6B2 Pavement Distress Assessment of Data Availability to Support Analysis of Design Features Problem Statement Number LTPP-PROJ-0000181 $200000 Proposed $400000 Reevaluate Validity of Models and Provide Periodic Updates to Models or Calibrations Proposed $200000 1/1/00 to 1/1/00 3A10 Proposed $250000 4

1/1/00 to 1/1/00 1A10 Proposed 1/1/00 to 1/1/00 4A10 FHWA FHWA-PROJ-13-0098 Proposed $0

1/1/00 to 1/1/00 2A10 Pavement Performance Measures and Forecasting, and the Effects of Maintenance and 1/1/00 to 1/1/00 7A10 Proposed Problem Statement Number LTPP-PROJ-0000051 B Rehabilitation Strategy on Treatment Effectiveness 1/1/00 to 1/1/00 8A10 NCHRP 1-48

Seasonal Variations in Backcalculated Moduli of Asphalt-Bound Pavement Layers Incorporating Pavement Preservation Into the Mechanistic-Empirical Pavement Design Mechanistic-empirical procedures for using commonly collected pavement data Very $415197 Problem Statement Number LTPP-PROJ-0000027 $225000 Guide to predict specific distresses. High Active Impact of Mix and Materials Properties on Individual Distress Type for Concrete Problem Statement Number LTPP-PROJ-0000182 Proposed 9/30/13 to 12/31/16 6B3 $262124 Pavements Benefits of Design Features Captured Adequately in Mechanistic-Empirical Models 1/1/00 to 1/1/00 3A11 Completed $0 2 $0 B B 9D1

Proposed FHWA LTPP-PROJ-0000139 Proposed

Critical 1/1/00 to 1/1/00 2A11 Problem Statement Number LTPP-PROJ-0000052 Very Consequences of Deferred Treatment of Pavement Preservation Treatment Placement on B 1/1/00 to 1/1/00 8A11 Determination of Frost Penetration in Long-Term Pavement Performance Test Sections Quality of data. High NCHRP 20-50(5) Asphalt Concrete, Portland Cement Concrete and Composite Pavement Structures Very Problem Statement Number LTPP-PROJ-0000195

and Other Instrumented Sites Variations in Pavement Design Inputs Impact of design features on pavement distress. High Applying Long-Term Pavement Performance Data to Pavement Preservation Roadmap $425000 Problem Statement Number LTPP-PROJ-0000028 2 $100000 $249991 Programmed $150000 Effect of Warm Mix on Pavement Performance

Problem Statement Number

Developing Pavement Catalogs

LTPP-PROJ-0000183

Proposed 2 Completed 1/1/00 to 1/1/00 6B4 Proposed $0 1/1/00 to 1/1/00 3A12 1 $400000 5B1 1/1/00 to 1/1/00 9D2 FHWA LTPP-PROJ-0000010 Proposed Proposed

Optimization of Traffic Data Collection for Specific Pavement Applications 1/1/00 to 1/1/00 2A12 NCHRP 20-05/Topic 39-01 1/1/00 to 1/1/00 8A12 Problem Statement Number LTPP-PROJ-0000053 Quality Management of Pavement Distress Data Collection Problem Statement Number LTPP-PROJ-0000100 NCHRP 1-34A $266058 Impact of Management and Rehabilitation Treatments on Temporal Variations in Evaluation of the Performance Prediction Models in the Mechanistic-Empirical Contributions of Pavement Structural Layers to Rutting of Flexible Pavements Completed $30000 Pavement Materials FHWA LTPP-PROJ-0000206 Pavement Design Guide 1/23/03 to 8/15/05 1B1 Completed $149923 Effect of Dowel Misalignment on Concrete Pavement Performance $1200000 4B1 $400000 C Completed Proposed $274773.7100 Proposed 7B1 FHWA FHWA-PROJ-09-0045 1/1/00 to 1/1/00 3A13 1/1/00 to 1/1/00 5B2 High Active E

Development of New Default Traffic Datasets for the Mechanistic-Empirical Pavement FHWA LTPP-PROJ-0000079 5/9/14 to 6/8/17 8A13

Guidelines for optimal timing of 

pavement maintenance and rehabilitatio

n treatments.

B Tools/guidelines for 

characterizing material properties.

High Design Guide Using the Data from Long-Term Pavement Performance Specific Study of Long-Term Pavement Performance Pavement Deflections NCHRP 1-34B

Problem Statement Number LTPP-PROJ-0000054 Pavement Study Traffic Data Collection Pooled Fund Study, TPF-5(004) FHWA LTPP-PROJ-0000208 Effectiveness of Subsurface Drainage for Hot-Mix Asphalt and Portland Cement $100000 1 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 

Relationships among material properties determined in the laboratory 

and field.

Using Multiobjective Optimization to Enhance Calibration of Performance Models in the Concrete Pavements $258409 Completed 3 Mechanistic-Empirical Pavement Design Guide Completed 4/1/01 to 9/1/01 4B2 $50000

9/30/09 to 5/30/12 1B2 $115404 Problem Statement Number LTPP-PROJ-0000140 Completed 1 $175000 Active Followup of NCHRP to 14-14 Research with Emphasis on Quantitative Analysis of 7B2 Problem Statement Number LTPP-PROJ-0000196

Proposed FHWA FHWA-PROJ-09-0024 7/28/14 to 3/31/17 5B3 Enlarged Long-Term Pavement Performance Maintenance and Rehabilitation Database B Long-Term Pavement Performance Lessons Learned on Management, Design, and Data FHWA LTPP-PROJ-0000011 1/1/00 to 1/1/00 3A14 Simplified Techniques for Evaluation and Interpretation of Pavement Deflections for (M&R) and Supplemental M&R Data From State Highway Administrations and Others Variability in Very Large Research Projects Effect of Traffic Data Input Levels on Mechanistic-Empirical Pavement Design Guide NCHRP 9-48 Network-Level Analysis NCHRP 1-34C B. Future improvements to the ME-PDG.

High $250000 $600000 Outputs Field Versus Laboratory Volumetrics and Mechanical Properties Effects of Subsurface Drainage on Performance of Asphalt and Concrete Pavements $299951 Problem Statement Number LTPP-PROJ-0000055 Proposed Proposed $350000 $500000 Completed $116924 Quantify the Impact of Construction Variability on Pavement Susceptibility to 1/1/00 to 1/1/00 6C1 1/1/00 to 1/1/00 9E1

Programmed Completed 8/1/09 to 10/31/11 4B3 Completed 2 Environmentally Induced Variations 1/1/00 to 1/1/00 1B3 2B1 7B3

$350000 Problem Statement Number LTPP-PROJ-0000141 Problem Statement Number LTPP-PROJ-0000197

Proposed Problem Statement Number LTPP-PROJ-0000080 C NCHRP 9-44A Development of Cost-Effective Combinations of Scheduled Maintenance and Material Characteristics for Pavement Design (Moved from 2E1 v2) Problem Statement Number LTPP-PROJ-0000012 FHWA LTPP-PROJ-0000030 1/1/00 to 1/1/00 3A15 Analysis of Long-Term Pavement Performance Friction Data NCHRP 1-34D Validating an Endurance Limit for Hot-Mix Asphalt Pavements: Laboratory Experiment Rehabilitation Treatments Over Long-Life Pavement Design Periods Very $250000 Evaluation of Lane and Directional Changes of Traffic Loading Over Time Temperature Predictions and Adjustment Factors for Asphalt Pavements Effects of Subsurface Drainage on Performance of Asphalt and Concrete Pavements, and Algorithm Development $100000 $375000 Proposed Calibrated relationships (transfer functions) between 

pavement response and individual distress types.

High Evaluation, and Analysis of Long-Term Pavement Performance SPS-1 and SPS-2 Field $150000 $231930 Proposed $839456 Proposed 1/1/00 to 1/1/00 9E2 Sections Proposed Completed 1/1/00 to 1/1/00 4B4 Completed 1/1/00 to 1/1/00 6C2

1/1/00 to 1/1/00 1B4 10/1/94 to 6/1/99 2B2 3 $230000 8B1

Completed Problem Statement Number LTPP-PROJ-0000081 Problem Statement Number LTPP-PROJ-0000142 7B4 FHWA LTPP-PROJ-0000013 FHWA LTPP-PROJ-0000031 Quantitative Information of Environmental Variables on Pavement Performance Measures Problem Statement Number LTPP-PROJ-0000185 B FHWA LTPP-PROJ-0000101 Development of Optimal Distress Threshold Triggers for Unscheduled Rehabilitation Guidance to Facilitate the Analyst's Use of the Long-Term Pavement Performance Analyses Relating to Pavement Material Characterizations and Their Effects on Re-examination of Distress Types in Long-Term Pavement Performance Versus $500000 Validation of Guidelines for k-Value Selection and Concrete Pavement Performance Treatments

Traffic Data Pavement Performance NCHRP 20-50(8/13) Mechanistic-Empirical Pavement Design Guide Impact of long-term environmental effects on pavement layer characteristics and Very Proposed Prediction $250000 Factors Affecting Pavement Smoothness $412210.3500 $270000 performance. High 1/1/00 to 1/1/00 4B5 $150000 $84000 Proposed Active Completed $199998 Proposed Completed 1/1/00 to 1/1/00 6C3

7/21/14 to 12/31/17 1B5 4/1/95 to 9/1/97 2B3 Completed 1/1/00 to 1/1/00 8B2 FHWA LTPP-PROJ-0000082 10/1/94 to 7/1/96 5C1 1 7B5 Quality Management Procedures for Network Level Pavement Condition Data

FHWA LTPP-PROJ-0000032 Problem Statement Number LTPP-PROJ-0000186 $149193 FHWA LTPP-PROJ-0000102

Backcalculation of Layer Parameters for Long-Term Pavement Performance Test NCHRP 10-66 FHWA LTPP-PROJ-0000162 New Models Related to Design Features Completed Design and Construction of Portland Cement Concrete Pavements, Volume I Sections, Volume I Predicting Inservice Performance of Flexible Pavements from Accelerated Pavement Investigation of Development of Pavement Roughness 10/1/11 to 2/28/13 4B6 $400000 $84000 Testing $125000 $194534 Proposed

Completed $100000 Completed D Completed 1/1/00 to 1/1/00 8B3 C 10/1/94 to 8/1/98 5C2

8/7/97 to 7/31/98 2B4 Completed Selection of timely and effective maintenance  6/1/95 to 8/1/97 7B6

and rehabilitation activities

High Very 3B1 Problem Statement Number LTPP-PROJ-0000187 Procedures for forecasting and backcasting traffic loading data. High FHWA LTPP-PROJ-0000103

FHWA LTPP-PROJ-0000033 FHWA LTPP-PROJ-0000163 Cracking Mechanisms Design and Construction of Portland Cement Concrete Pavements, Volume II Backcalculation of Layer Parameters for Long-Term Pavement Performance Test FHWA LTPP-PROJ-0000057 2 Common Characteristics of Good and Poorly Performing Portland Cement Concrete and $0 C $84000 Sections, Volume II Determination of Frost Penetration in Long-Term Pavement Performance Sections Asphalt Concrete Pavements 3 Proposed Completed $171000 $98922 Very NCHRP 9-40 $240003 1/1/00 to 1/1/00 8B4 10/1/94 to 8/1/98 5C3

Completed Completed History of advances in measures. High Optimization of Tack Coat for Hot-Mix Asphalt Placement Completed

FHWA LTPP-PROJ-0000014 5/1/97 to 8/31/01 2B5 8/1/97 to 7/1/98 3B2 10/1/96 to 11/1/97 7B7 $428000 Problem Statement Number LTPP-PROJ-0000188 Estimating Cumulative Traffic Loads, Phase 1 FHWA LTPP-PROJ-0000104

Completed New Models Related to Distress Prediction 3 Design and Construction of Portland Cement Concrete Pavements, Volume III $250000 FHWA LTPP-PROJ-0000034 FHWA LTPP-PROJ-0000058 6D1 FHWA LTPP-PROJ-0000164 $400000 Completed $84000 Review of the Long-Term Pavement Performance Backcalculation Results Long-Term Pavement Performance Computed Parameter: Frost Penetration Curl and Warp Analysis of the Long-Term Pavement Performance SPS-2 Site in Arizona Proposed 10/15/98 to 9/30/01 1C1 Completed $228530 $199819 FHWA FHWA-PROJ-10-0069 Problem Statement Number LTPP-PROJ-0000144 $28000 1/1/00 to 1/1/00 8B5 10/1/94 to 8/1/98 5C4

Completed Completed Relating Ride Quality and Structural Adequacy for Pavement Rehabilitation/Design Determine the Effect of Repair Techniques on the Performance of Subsequent Hot-Mix Completed

FHWA LTPP-PROJ-0000015 1/23/03 to 8/31/05 2B6 7/1/05 to 6/30/08 3B3 Decisions Asphalt Overlays 2/26/10 to 7/31/12 7B8 Problem Statement Number LTPP-PROJ-0000189 Estimating Cumulative Traffic Loads, Phase 2 NCHRP 1-41 $227465 Models for Predicting Reflection Cracking of Hot-Mix Asphalt Overlays $250000 Changes in Material Properties Over Time (e.g. bases) $293000 Completed FHWA FHWA-PROJ-11-0066 FHWA LTPP-PROJ-0000059 Proposed FHWA FHWA-PROJ-14-0130 $750000 Completed 12/1/10 to 12/1/12 4C1 $500000 Backcalculation of the Long-Term Pavement Performance Program Deflection Data Effect of Multiple Freeze Cycles and Deep Frost Penetration on Pavement Performance 1/1/00 to 1/1/00 6D2 Advancement of Profile-Based Curl and Warp Analysis Using Long-Term Pavement Proposed 10/31/99 to 12/20/02 1C2 Completed and Cost Performance (LTPP) Profile Data $585144 1/1/00 to 1/1/00 8B6 5C5

Completed $369683 Problem Statement Number LTPP-PROJ-0000083 Problem Statement Number LTPP-PROJ-0000145 $249990

FHWA LTPP-PROJ-0000016 9/30/11 to 12/29/15 2B7 Completed Update of Pavement Smoothness Index Relationship Cost Effectiveness of Maintenance and Rehabilitation Design Features Active

Modeling and Predicting Truck Loading Patterns for Pavement Design Problem Statement Number LTPP-PROJ-0000190 3/4/03 to 6/4/06 3B4 $150000 NCHRP 1-42 5/9/14 to 11/10/16 7B9 $150000 Guidance on the Use of Long-Term Pavement Performance Data for the Top-Down Fatigue Cracking of Hot-Mix Asphalt Layers  Phase I $193919 Proposed FHWA LTPP-PROJ-0000035 Proposed Mechanistic-Empirical Pavement Design Guide by Non-State Agency Users (i.e. Active 1/1/00 to 1/1/00 4C2 $39556 Relationships Between Material Properties Determined in Field and Laboratory for Problem Statement Number LTPP-PROJ-0000060 1/1/00 to 1/1/00 6D3 Problem Statement Number LTPP-PROJ-0000165 consultants, contractors, associations, local governments, academics, international) 7/21/14 to 9/1/17 1C3 Completed Untreated Materials Conduct an Objective Assessment of the Applicability and Utility of Existing Models for Quantify the Impact of Asphalt Concrete Pavement Design Features on Measured $0 5C6 Prediction of Long-Term Changes in Pavement Materials FHWA LTPP-PROJ-0000084 Pavement Distresses $300000 Problem Statement Number LTPP-PROJ-0000146 Proposed

Programmed $200000 Estimate Long-Term Pavement Performance Faulting Data Using Profile Measurements Selection of Optimal Rehabilitation Techniques for Existing Conditions $300000 1/1/00 to 1/1/00 8B7

1/1/00 to 1/1/00 2B8 Proposed $0 NCHRP 1-52 Proposed $200000 1/1/00 to 1/1/00 3B5 Completed A Mechanistic-Empirical Model for Top-Down Cracking of Asphalt Pavement Layers 1/1/00 to 1/1/00 7B10 Proposed 11/1/12 to 11/1/14 4C3 $500000 Problem Statement Number LTPP-PROJ-0000036 1/1/00 to 1/1/00 6D4

Active Relationships Among Material Properties Determined in the Laboratory and Field for Problem Statement Number LTPP-PROJ-0000061 Problem Statement Number LTPP-PROJ-0000166

3/4/13 to 9/30/16 5C7 Hot-Mix Asphalt Environmentally Induced Changes and Degradation Problem Statement Number LTPP-PROJ-0000085 Quantify the Impact of Rigid Pavement Design Features on Measured Pavement Problem Statement Number LTPP-PROJ-0000147

Synthesis of Current Pavement Condition Data Collection Practice Distresses $375000 $200000 Methodology to Enable Development of Long-Term Rehabilitation and Maintenance Proposed Proposed $75000 NCHRP 9-30A Schedules $300000

1/1/00 to 1/1/00 2B9 1/1/00 to 1/1/00 3B6 Proposed Calibration of Rutting Models for Hot-Mix Asphalt Structural and Mix Design Proposed $750000 1/1/00 to 1/1/00 4C4 $1000000 1/1/00 to 1/1/00 7B11 Proposed Completed Problem Statement Number LTPP-PROJ-0000037 1/1/00 to 1/1/00 6D5

5C8 Relationships Among Material Properties Determined in the Laboratory and Field for Problem Statement Number LTPP-PROJ-0000086 Problem Statement Number LTPP-PROJ-0000167

Portland Cement Concrete Guidelines for Transitioning From One Technology to Another Quantify the Impact of Design Features on Measured Distresses for Rehabilitated

Problem Statement Number LTPP-PROJ-0000109 Flexible Pavements $250000 $500000

Proposed C Proposed Evaluation of Pavement Performance Models  Filling in the Gap with National $300000

1/1/00 to 1/1/00 2B10 1/1/00 to 1/1/00 4C5 Cooperative Highway Research Program 1-41 (after NCHRP 1-41) Proposed

Critical $200000 1/1/00 to 1/1/00 7B12

Proposed

1/1/00 to 1/1/00 5C9 Problem Statement Number LTPP-PROJ-0000168 1 Quantify the Impact of Design Features on Measured Distresses for Rehabilitated Rigid

Problem Statement Number LTPP-PROJ-0000110 Pavements

C FHWA LTPP-PROJ-0000062 Development of Longitudinal Cracking Models for Portland Cement Concrete Pavements $300000

Evaluation of the Integrated Climatic Model Using Long-Term Pavement Performance D (after NCHRP 1-42) Proposed

Seasonal Monitoring Program Data $200000 1/1/00 to 1/1/00 7B13

Data management. Estimate material design properties from conventional material High

parameters. $0 Proposed

Completed 1/1/00 to 1/1/00 5C10 Problem Statement Number LTPP-PROJ-0000169

2/27/01 to 12/31/07 3C1 1 Evaluation and Characterization of Pavement Drainage (after NCHRP 1-34D) 1

Problem Statement Number LTPP-PROJ-0000111 $400000

FHWA FHWA-PROJ-14-0129 NCHRP 20-05/Topic10-05 Revise Modeling of Fatigue Cracking to be a Fracture and Healing Process Proposed

Problem Statement Number LTPP-PROJ-0000038 Increase in Roughness Due to Environmental Factors in Flexible Pavements Collection and Use of Pavement Condition Data $900000 1/1/00 to 1/1/00 7B14

Estimating Subgrade Resilient Modulus From Conventional Soils Test Parameters (To Be $208583 $0 Proposed Combined With 2D2 and 2F1a) Active Completed 1/1/00 to 1/1/00 5C11 Problem Statement Number LTPP-PROJ-0000170

$300000 7/23/14 to 1/23/17 3C2 4D1 Common Characteristics of Good and Poorly Performing Asphalt Concrete and Portland Proposed Problem Statement Number LTPP-PROJ-0000112 Cement Concrete Pavements

1/1/00 to 1/1/00 2C1 FHWA FHWA-PROJ-14-0131 NCHRP 20-50(9) Implementation of National Cooperative Highway Research Program 1-41, Reflection $300000

Incorporating a Curling Factor in Layer Moduli Backcalculation Using Long-Term Feasibility of Using Falling Weight Deflectometer Deflection Data to Characterize Cracking Design Program Proposed

Pavement Performance's Seasonal Monitoring Program Falling Weight Deflectometer Pavement Construction Quality $760000 1/1/00 to 1/1/00 7B15

Data for Jointed Pavement Test Sections $174996 Proposed

$138092 Completed 1/1/00 to 1/1/00 5C12 Problem Statement Number LTPP-PROJ-0000171

Completed 4D2 Factors Affecting Pavement Smoothness/Roughness

D 5/1/14 to 5/31/16 3C3 Problem Statement Number LTPP-PROJ-0000113 $250000

Problem Statement Number LTPP-PROJ-0000089 Incorporating Top-Down Longitudinal Cracking Into Mechanistic-Empirical Pavement Proposed Very Using deflection and DCP procedures to obtain material  FHWA LTPP-PROJ-0000063 Lessons Learned From Long-Term Pavement Performance Condition Data Development Design Guide 1/1/00 to 1/1/00 7B16

properties and their variability. High Mining Long-Term Pavement Performance Data to Develop Guidelines on Temporal $100000 $750000 Aspects of Pavement Performance Monitoring Measurements Proposed Proposed

1 $450000 1/1/00 to 1/1/00 4D3 1/1/00 to 1/1/00 5C13

Programmed

1/1/00 to 1/1/00 3C4

Problem Statement Number LTPP-PROJ-0000090 Problem Statement Number LTPP-PROJ-0000114 Problem Statement Number LTPP-PROJ-0000039

Development of Transfer Functions for Spalling, Faulting, Raveling, and Thermal Material Properties and Variability With Depth (To Be Combined With 2C2 and 2F1a) Problem Statement Number LTPP-PROJ-0000064 Identify the Best Format for Use of Pavement Condition Data in an Integrated Delivery

System Cracking Along With Calibration and Validation C

$200000 Identification of the True Critical Variables for Understanding Temporal Variations in $0

Guidelines for the selection of 

pavement design features.

High Proposed $150000 Pavements Proposed Proposed 1/1/00 to 1/1/00 2D1

$350000 1/1/00 to 1/1/00 4D4 1/1/00 to 1/1/00 5C14

Proposed 1

1/1/00 to 1/1/00 3C5 FHWA LTPP-PROJ-0000207

LTPP Computed Parameter: Top-Down Cracking Problem Statement Number LTPP-PROJ-0000172

Guidelines for the Selection of Pavement Design Features $239099

Active $250000

E 7/21/14 to 9/20/17 5C15 Proposed

Guidelines for characterizing  1/1/00 to 1/1/00 7C1

material properties.

High D

1 Quantify the relative impacts of environmental factors and traffic loading on Very

FHWA LTPP-PROJ-0000040

pavement performance. High

2 D

Estimation of Key Portland Cement Concrete, Base, Subbase, and Component

Engineering Properties From Routine Tests and Physical Characteristics

Impact of pavement roughness on 

the dynamic loads applied to 

pavements.

High

$368386 FHWA LTPP-PROJ-0000065

Completed Verification of Long-Term Pavement Performance Virtual Weather Stations Phase I 3 8/13/07 to 4/13/10 2E1 Report: Accuracy and Reliability of Virtual Weather Stations

$135000 Problem Statement Number LTPP-PROJ-0000115 Problem Statement Number LTPP-PROJ-0000041 Completed Coupling Vehicle Dynamics and Pavement Performance Prediction Models (Coordinate Estimation of Key Hot-Mix Asphalt, Base, Subgrade, and Component Engineering 1/1/00 to 10/1/00 3D1 with 4C1) Properties from Routine Tests and Physical Characteristics

$375000 $500000 Problem Statement Number LTPP-PROJ-0000066 Proposed Proposed Assess and Quantify the Effects of Traffic Loading, Environment, and Their Interaction 1/1/00 to 1/1/00 5D1 1/1/00 to 1/1/00 2E2 on Pavement Life

$500000

Proposed

1/1/00 to 1/1/00 3D2

Problem Statement Number LTPP-PROJ-0000067

Application of the Long-Term Pavement Performance Data to Validate Theoretical E

Analysis of the Relative Impacts of the Environment and Traffic on Pavement Response Validation of pavement response 

and performance prediction models.

High

F

Time and load dependent material properties. High and Subsequent Performance

$200000

1 Proposed 1

1/1/00 to 1/1/00 3D3

NCHRP 1-50 FHWA FHWA-PROJ-10-0006

National Forensic Workshop and Forensic Guidelines Quantifying the Influence of Geosynthetics on Pavement Performance

$125000 $600000 Completed Active

2/1/10 to 3/1/13 5E1 9/1/11 to 8/31/16 2F1

NCHRP 1-49 Problem Statement Number LTPP-PROJ-0000199

Guidelines for Conducting Forensic Investigation of Highway Pavements Short- and Long-Term Variability of the Subgrade, Subbase, and Base Layer Properties

(to be combined with 2C2 and 2D2) $499999

Completed $275000 5E2 Proposed

1/1/00 to 1/1/00 2F2

Problem Statement Number LTPP-PROJ-0000117

Forensic Investigation of SPS-9 in Connecticut Problem Statement Number LTPP-PROJ-0000200

Time- and Load-Dependent Portland Cement Concrete Material Properties $20000

Proposed $400000 1/1/00 to 1/1/00 5E3 Proposed

1/1/00 to 1/1/00 2F3

Problem Statement Number LTPP-PROJ-0000201

Short- and Long-Term Variability of the Apshalt Concrete Layer Properties

$250000

Proposed F

1/1/00 to 1/1/00 2F4 Response models for 

construction quality control.

High

Problem Statement Number LTPP-PROJ-0000202

Assessment of Changes in Pavement Friction Levels With Time and Loading 2

$400000

Proposed Problem Statement Number LTPP-PROJ-0000118 1/1/00 to 1/1/00 2F5 Asphalt Mixture Composition From Ground Penetrating Radar Signal Analysis

$0

Proposed

1/1/00 to 1/1/00 5F1

Problem Statement Number LTPP-PROJ-0000119

Concrete Mixture Composition From Ground Penetrating Radar Signal Analysis

$0

Proposed

1/1/00 to 1/1/00 5F2

Problem Statement Number LTPP-PROJ-0000120

Base Course Mixture Composition From Ground Penetrating Radar Signal Analysis

$0

Proposed

1/1/00 to 1/1/00 5F3

Problem Statement Number LTPP-PROJ-0000121

Subgrade Mixture Composition from Ground Penetrating Radar Signal Analysis

$0

Proposed

1/1/00 to 1/1/00 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

$0

Proposed

1/1/00 to 1/1/00 5F5

Problem Statement Number LTPP-PROJ-0000123

Constitutive Model of Concrete From Ground Penetrating Radar Composition and

Calibrated to Falling Weight Deflectometer Measurements

$0

Proposed

1/1/00 to 1/1/00 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

$0

Proposed

1/1/00 to 1/1/00 5F7

Problem Statement Number LTPP-PROJ-0000125

Expected Asphalt Fatigue Life, Risk, and Reliability Prediction From Ground Penetrating

Radar/Falling Weight Deflectometer Inputs

$0

Proposed

1/1/00 to 1/1/00 5F8

Problem Statement Number LTPP-PROJ-0000126

Expected Asphalt Rutting Life, Risk, and Reliability Prediction From Ground Penetrating

Radar/Falling Weight Deflectometer Inputs

$0

Proposed

1/1/00 to 1/1/00 5F9

Problem Statement Number LTPP-PROJ-0000127

Reconsideration of Asphalt Pay, Incentive, and Penalty Factors from Ground Penetrating

Radar/Falling Weight Deflectometer Inputs

$0

Proposed

1/1/00 to 1/1/00 5F10

Problem Statement Number LTPP-PROJ-0000128

Evaluation of Aggregate Absorptivity and Its Impact on Concrete Performance

$175000

Proposed

1/1/00 to 1/1/00 5F11

Problem Statement Number LTPP-PROJ-0000129

Use of Nondestructive Evaluation on Construction Risk Assessment

$675000

Proposed

1/1/00 to 1/1/00 5F12

Priorities Dashed light blue boxes are ongoing Hashed orange boxes are planned FHWA March 13, 2017 projects or data studies that will be funded NCHRP projects that were initiated by the using LTPP budgeted funds. LTPP ETG. Solid Light Blue boxes are

Critical completed projects.

Dashed orange boxes are ongoing FHWA Note Dashed pink boxes are ongoing NCHRP Very High projects that were funded using LTPP projects that were initiated by other budgeted funds. agencies or work groups, but are directly 1) Problem Statements are assigned a 3 character number associated with LTPP Data Analysis Plan

High Strategic Objectives and Analysis

Outcomes.Solid Pink boxes are completed

projects. Thin solid boxes are completed projects

with reports pending.

Sequence 1 2 3 Dashed white boxes are proposed Research

Problem Statements that were developed at

LTPP Workshops. See Note 1) for an

Thick solid boxes are completed projects

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.

explanation of the Problem Statement

Numbering scheme. with reports published.

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.

*blue

*pink

*orange

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*pink

*blue

*blue

*blue

*blue

*blue

*blue

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*orange

*hashed

*hashed

*hashed

*hashed

*hashed

*hashed

*hashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed *white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

*white-dashed

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.

Relate material properties to pavement performance. Characterization of temporal variations in pavements.

Up-to-date LTPP maintenance and rehabilitation data 

validated for analysis use.

Impact of design features on measured pavement 

responses (deflections, load-transfer, strains, etc.)

Efficacy and performance prediction for pavement 

maintenance and rehabilitation options.

Guidelines for using traffic data in pavement applications.

Recommendations for data collection to adequately 

consider temporal variations in predicting pavement 

performance.

Very

High

Very

High