安全確保速度に基づく模範的な無信号交差点通過行動の数理的探索法

概要

論文の詳細を見る
Highest admitted speed (HAS) is a quantitative evaluation index of the risk level of a drivers behavior when passing through an unsignalized intersection without the right of way. In physical terms, HAS is the highest speed a crossing vehicle such as a car or a bicycle approaching from either the right or the left may travel without colliding with the subject vehicle. The values of HAS for various vehicles are calculated on the basis of actual driving profiles consisting of the velocity profile of the subject vehicle and the eye movement and pedal operation of its driver. In this study, we propose a method for mathematically searching for optimal driving profiles that have values of HAS for specified crossing vehicles at low risk levels in accordance with the shape of an intersection. In the case study, optimal driving profiles were derived for a specified intersection. The HAS values of these profiles for four typical vehicles were higher than those of an expert driver. By comparing the optimal profile with the actual profile of each driver, we could pinpoint the behavior modifications made by the driver. We thus conclude that the proposed method is useful for identifying a drivers unsafe behavior and improving his or her awareness of safe driving.