01552172

Component

https://doi.org/10.3141/2523-09

Pavement management systems of highway agencies in the various states are primarily based on surface condition data. Surface cracking is used as the main indicator of pavement structural condition. However, with effective pavement treatment that intervenes early to preserve and extend the life of pavements and increasingly thicker long-life pavements, surface cracks no longer tell the true structural condition, or health, of the pavement structure. In addition, surface cracks lack an indicator of pavement deterioration. Knowledge of the true pavement structural condition and the rate of deterioration is needed not only for planning of optimal structural rehabilitation activities and future budget needs but also for implementing a performance-based federal-aid program. This paper presents a methodology for interpreting measurements from traffic speed deflection devices (TSDDs) to track flexible pavement structural condition over time and for assessing rehabilitation needs at a network level to address both structural adequacy and surface condition. The paper also demonstrates a methodology for interpreting TSDD measurements to estimate remaining pavement structural capacity. Curvature indexes measured from TSDD were found to be reasonable estimators of pavement structural condition and were used in the demonstration. Horizontal tensile strain, a primary initiator of fatigue damage and cracking, can be estimated from periodic TSDD measurements and used as a leading indicator of pavement deterioration and structural performance. Any differences in pavement structural performance arising from the pavement’s as-designed versus as-constructed state and its assumed versus actual traffic and climate effects can be assessed and future treatments modified as necessary.

01594347

15-5288

English

pp 72–79

2015

Transportation Research Record: Journal of the Transportation Research Board

9780309369442

Print

Figures (8) ; References (17) ; Tables (2)

Deflection; Deterioration; Flexible pavements; Instruments for measuring deformation or deflection; Pavement management systems; Pavement performance; Tension

Pavement structural condition; Structural capacity

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB, ATRI

Dec 30 2014 1:46PM

• Analysis of the Performance of an Air-Powered Energy-Harvesting Pavement
• Crack Recognition and Segmentation Using Morphological Image-Processing Techniques for Flexible Pavements
• Effect of Proportion of Missing Data on Application of Data Imputation in Pavement Management Systems
• Effective Systems for Rating Pavement Condition
• Grouping Pavement Segments to Form Realistic Projects
• Identifying Deficient Pavement Sections by Means of an Improved Acceleration-Based Metric
• Mix Design of Polymer-Modified and Fiber-Reinforced Warm-Mix Asphalts with High Amount of Reclaimed Asphalt Pavement: Achieving Sustainable and High-Performing Pavements
• Pavement Condition: New Approach for Iowa Department of Transportation
• Pavement Treatment Practices and Dynamic Albedo Change in Urban Pavement Network in California
• Performance Trends on Interstate Highway Sections of the Long-Term Pavement Performance Program
• Probabilistic Life-Cycle Cost Analysis of Pavements: Drivers of Variation and Implications of Context
• Process and Data Needs for Local Calibration of Performance Models in the AASHTOWARE Pavement ME Software
• Quantifying Roughness of Unpaved Roads by Terrestrial Laser Scanning
• Roughness Index Measured with Triple-Point and Line Lasers in Textured and Nontextured Strips
• Scenarios Developed for Improved Sustainability of Illinois Tollway: Life-Cycle Assessment Approach
• Sustainable Pavement Management: Integrating Economic, Technical, and Environmental Aspects in Decision Making