抄録
Studies of autonomous driving systems are being conducted to realize a safe and secure mobile society. According to these studies, the safety of the system and the driver’s feeling of security often do not match. To enable automatic driving control according to the driver's comfort, previous researchers introduced risk feeling index to quantify the driver’s feeling of security, without accounting for the effects of drivers’ individual differences. The purpose of this study is to quantify the risk feeling perceived by the driver while considering individual differences. We extracted the factor of individual differences comprehensively to examine the model of risk feeling based on the expectation effect theory. Using a driving simulator, we investigated the effect of the extracted factor on the subjective assessment of risk feeling while overtaking. The results suggest that risk is perceived based on both the individual driving characteristic of anxiety while driving and the experimentally manipulated prior prediction. These findings will enable the development of a secure automatic driving system that suits each driver by controlling the system appropriately based on the driver’s driving characteristics.
