Early analyses of SHRP Long-Term Pavement Performance LTPP general pavement studies data : executive summary.

This executive summary presents the results from the first analyses of the SHRP Long-Term Pavement Performance (LTPP) data collected up to 1992. These analyses include (1) developing a data analysis plan, (2) receipt and processing of data into suitable databases for analysis and conducting statistical evaluations of the databases, (3) using the LTPP data to evaluate the American Association of State Highway and Transportation Officials (AASHTO) design equations, (4) conducting sensitivity analyses to identify the independent variables that have significant impacts on pavement performance and to quatify the relative impact of each, and (5) using the experience gained from these early data analyses to recommend concepts for future data analyses.