Abstract
We investigated the effects of aroma of trees (air supplement) on active safety during car driving in a driving simulator. In this study, we mainly analyzed the fluctuation of driver's pulse with respect to fatigue level and sleepiness level, reaction time to visual stimulus, and vehicle maneuver such as the fluctuation of time margin to the preceding vehicle. We clarified that Alfa-pinene which is one of aroma of trees is useful to minimize the fatigue level of drivers and to keep the safety time margin to the preceding vehicle, and Borneole is useful to minimize the sleepiness level of drivers and to keep the safety time margin to lane departure. It was revealed that the air supplement is useful as a device of active safety during car driving.
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