This research was directed toward developing a system for estimating changes in the flexible pavement design process as a result of trends noted in truck traffic. Maximum use was made of existing arizona traffic and weight data, with field studies made only where data were not available. Case studies were used to verify the accuracy and sensitivity of the procedures. The work involved (1) a search of available data on file within the arizona dot and from the AASHO road test, (2) collection of pertinent field data, and (3) analysis of these data to develop a computer simulation procedure for predicting the effects of current truck loading conditions. The output from this research is a computer model for estimating pavement design loadings (18-kip equivalent single-axle loads) using the old and "new" estimation techniques.
Abstract