Abstract
We discuss driving risk, driving pleasure and health from the view of interaction between task demand and human performance in car driving. Driving performance should be adapted to driving demand and the risk of accident will increase when the situation is deviated from the balance. Another important feature of car driving is that the driver can control the demand by changing speed, headway distance and so on. These features are coincident with those which realize the sense of pleasure based on the Flow theory proposed by Csikszentmihalyi. Also, the concept of demand control is closely related with the discretion that can remove the work stress to reduce risk of illness. The car driving is the most familiar experience for such positive aspect of human activity.
