Driving behavior model considering driver's over-trust in driving automation system

Levels one to three of driving automation systems~(DAS) are spreading fast. However, as the DAS function become more and more sophisticated, not only the driver's driving skills will be reduced, but also the problem of over-trust will become serious. If a driver has over-trust in the DAS, he/she will become not aware of hazards in time. To prevent the driver's over-trust in the DAS, this paper discusses the followings: 1) the definition of over-trust in the DAS; 2) a hypothesis of occurrence condition and occurrence process of over-trust in the DAS, and 3) a driving behavior model based on the trust in the DAS, the risk homeostasis theory and the over-trust prevention human-machine interface~(HMI).