Abstract
It is difficult to make the quantitative assessment of accident reduction effect of driving safety support systems in a real world. Therefore we try to predict the traffic accident reduction effect by simulation as the pre-stage or the alternative of the test in the real world. First for this purpose, we need to reproduce traffic accidents in the traffic simulator on the same mechanism as the real world. In this paper we describe the approach to reproduce the traffic accident and how to take advantage of the traffic accident simulation. Through a number of sensitivity analyses, we can analyze the generating mechanism or the condition set of a very rare traffic accident, and evaluate how intelligent-transportation-system (ITS) technology would work in the situation that causes traffic accidents.
