Abstract
It is generally said that the most of the traffic accident occurs in intersections. In Japan, the 60% of traffic accidents occur in intersections. Furthermore, the 45% of fatal accidents occur in intersections. Especially, the driver approaching the traffic signal during yellow phase sometimes falls into a dilemma whether to stop at the stop-line or to pass through the intersection. In order to avoid driver’s dilemma, dilemma reaction signals are experimentally introduced in Japan. The dilemma reaction signals regulates the start time of yellow phase until the vehicles escape from dilemma zone. The dilemma zone is defined by D.C.Gazis in 1960th. The public experiment with dilemma reaction signals has been conducted. The signal gives effectiveness to some extent, but there still remains unclear regarding the area of dilemma. The previous study has pointed out that the area where drivers’ decision to stop are slightly different from the control area of dilemma reaction signals. In this paper, many sudden stopping incidents during yellow phase are collected utilizing event-triggered type drive recorder in Tokyo metropolitan area and Sapporo city. Utilizing drive recorder, onboard data during dilemma are effectively collected. Factors that affect drivers to decide to stop with yellow signals are elaborately investigated.
Keywords: Dilemma Zone, Driver Behavior, Event Triggered Type Drive Recorder