The FHWA’s Long-Term Pavement Performance (LTPP) program makes the world’s largest pavement performance database available annually to the public. However, a number of LTPP test sections are missing traffic data or have unreliable traffic parameters that limit the ability of researchers to use those sites in analyses that require traffic load as an input. In addition, the traffic data in the LTPP Standard Data Release can be complex and difficult to navigate. This project is designed to improve the LTPP database, both by significantly improving the traffic load data incorporated in it and by making it easier for pavement researchers to select the traffic data they need for specific analyses. As a subcontractor to Applied Research Associates (ARA), UW researchers are helping to identify the gaps and major limitations in the traffic data in the current LTPP Standard Data Release, provide traffic estimates for the LTPP sites with missing or questionable traffic data in the form of computed parameters tables, and provide guidance to help users quickly select the most appropriate LTPP test sites and traffic statistics for their pavement analyses.
Principal Investigator: Mark E. Hallenbeck, Civil and Environmental Engineering, UW
Sponsors:
FHWA
Applied Research Associates
ARA Technical Monitor: O. Selezneva
Scheduled completion: February 2019