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Publication Number: FHWA-HRT-05-079
Date: May 2006
Optimization of Traffic Data Collection for Specific Pavement Design Applications
Appendix C. Structural And Climatic Input
This Appendix lists the structural and climatic input values used for the 2002 Pavement Design Guide (PDG) for the detailed sensitivity analysis LTPP sites. The structural input is listed in the order in which it is entered into the PDG.
Structure: Jointed Portland Cement Concrete Pavement
Structure: Continuously Reinforced Concrete Pavement
Structure: Asphalt Concrete Pavement
a Codes based on Unified Soil Classification System (USCS) standards.(19)
Structure: Unbound Base
a Codes based on Unified Soil Classification System (USCS) standards. (19)
The climatic data for the detailed analysis sites were computed by the PDG as a function of the latitude/longitude of each site (table 38). Weather station data from the nearest three or four weather sites were used to estimate the site-specific weather data. The actual elevation of each site was used; however, all groundwater table elevations were set at 30.5 m (100 ft) to eliminate the resulting variations in pavement performance.
Topics: research, infrastructure, pavements and materials
Keywords: research, infrastructure, pavements and materials,Traffic input, NCHRP 1-37A design guide, LTPP, clustering, tolerable errors, confidence level.
TRT Terms: Pavements--Design and construction--Data processing, Traffic surveys--Data processing, Long-Term Pavement Performance Program (U.S.), Pavement performance