Effects of Urgency of Audiovisual Collision Warnings on Response Time and Accuracy of Steering

It is known that audiovisual warnings that have a higher urgency can achieve a faster driver’s response, i.e., shorter response times of braking and a secondary task during driving. However, the steering response has not been examined in earlier works. Moreover, few studies have examined the effects of the urgency of audiovisual warnings on the accuracy of a response regardless of whether braking or performing a secondary task. In this study, experiments using a driving simulator is carried out to investigate the effects of the urgency of audiovisual collision warnings on the response time and accuracy of steering in a case where a driver avoids a crash by performing a lane change.