Abstract
In this study, methodologies for estimating the accident mitigation ratio using the collision avoidance system are discussed. In these methodologies, the driver's braking or steering and viewing behavior are investigated in a driving simulator. Braking or steering behaviour was identified in terms of the reaction time for braking or steering in order to avoid a collision or lane deviation and viewing behaviour was identified in terms of the duration from looking off a leading vehicle to looking back. Next, to investigate the combined effect based on the reliability of driver and the reliability of system, two different kinds of reliability-estimation model simulating its operating status were constructed. The effectiveness of the system with different control setting can be quantitatively compared as the collision frequency or lane-deviation frequency calculated through time series Monte Carlo simulations or statistical calculations based on the reliability-estimation model.
