Basic Analysis of Measurement Data from Japan in EVEN Project

The second Permanent International Association of Road Congresses—World Road Association International Experiment to Harmonize Longitudinal and Transverse Profile Measure and Reporting Procedures (EVEN Project) was conducted in 1998 in three regions of the world. The aim of the research is to harmonize and correlate measures of road profiles for applications in pavement construction and management. The basic analysis and measurement results for roughness conducted in Hokkaido, Japan, are summarized. The longitudinal profile measurements obtained with seven high-speed profilometers in Japan, their influence on roughness indices such as the international roughness index, and the correlations between roughness indices, together with Japan’s current measurement and evaluation system for roughness, are also compared and analyzed.