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Calibration of CalME Models Using WesTrack Performance Data

A mechanistic-empirical (M-E) flexible pavement design method being developed for the California Department of Transportation (Caltrans) employs a software known as CalME. This report presents the results of a validation and calibration study for the CalME software using performance data from the Federal Highway Administration's WesTrack accelerated pavement test (APT) program. The calibration procedure used both falling weight deflectometer (FWD) field test data and laboratory-measured properties of all the mixes. Results of this CalME validation and calibration exercise revealed that the selected models selected were able to predict the performance observed on the full-scale APT experiment using actual trucks and environmental conditions at the site. Differences between actual and predicted performance were identified and recommendations for reducing these differences were made.