Abstract
Concerning driver-support-systems by providing information to drivers, we would propose to divide all information and warnings into three categories such as vehicle surroundings, components of the vehicle and the others, and to provide the drivers "Directional Indication" which gives them some indication of what to look. In order to confirm effectiveness of this support method an experiment was made on a personal-computer-based simulator. We compared some kinds of audio or visual prompters as a "Directional Indication", and examined the response time of the subjects, the number of their mistake and a subjective evaluation of their Mental Work Load. As a result, it turns out that the response time of the "Directional Indication" is shorter than that of the "various information" which takes time to understand, and all of the subjects would prefer the "Directional Indication". Especially directional-voice or moving-light allows the subjects redirect their attention smoothly and quickly.
