Calibration of Response-Type Road Roughness Measuring Systems

摘要

This report documents and presents the results of an intensive study of response-type road roughness measuring (RTRRM) systems for the purpose of developing methods for calibration and correlation. The road meter instruments and vehicles used in such systems were investigated to determine their performance characteristics and the necessary conditions for calibration. The specific roughness measures yielded by the systems are primarily dependent on the choice of roughness statistic, limitations of the meters, vehicle response, and nonuniformities of the tires and wheels. Accordingly, calibration methods were developed and tested for eliminating systematic differences between RTRRM systems. A standard measure of road roughness was developed for calibration purposes. The standard is defined in terms of the statistic measured and the dynamics of the system used for its measurement.