Abstract
This study examined a time driver needs to adapt to characteristic of vehicle after assisted steering is changed to manual steering. The experiment used a driving simulator. The level of driver's involvement in driving (the concerned level) was "Holding a steering wheel and front gazing (Pattern A)" and "Not holding a steering wheel and not front gazing (Pattern B)". The experimental condition was "lane change" and "side wind". As a result, in the case of Pattern A, driver needs 1 second to adapt to characteristic of vehicle in lane changing and 3 seconds in side wind. In the case of Pattern B, driver needs 2 seconds to adapt to it in lane changing and 3 seconds in side wind.
