This report documents the analysis of the Long-Term Pavement Performance (LTPP) data conducted to develop more complete information on this subject. The specific guidelines and procedures developed through this analysis were presented in a series of three design pamphlets addressing: (1) the selection of appropriate design values to characterize the sub grade soil, (2) interpretation of pavement deflection data, and (3) characterization of the pavement materials.
 

This report will be of interest to those involved in the development of new procedures for pavement design and material characterization,as well as those who wish to understand the technical basis for the referenced design pamphlets.