A STUDY OF COLLISION RISK EVALUATION FOR NEAR-MISS EXPERIENCE AT MERGING SECTION OF URBAN EXPRESSWAY

Abstract

The purpose of this study is to evaluate collision risk and propose safety countermeasures at three merging sections of urban expressway. First, in order to elucidate the occurrences of collision risk in merging section, we analyzed the collision risk between a merging vehicle and a main lane vehicle by using the PICUD index. Second, we conducted discriminant analyses for the results of the PICUD estimation in order to reveal the influence factors of collision risk at each merging section. As the result of discriminant analyses, it is found that the percentage of merging position and traffic volume of main lane have a huge effect on collision risk for merging movement. Furthermore, we examined some countermeasures to reduce collision risk in each merging section by sensitivity analysis.