Abstract
The foggy freeway is a scenario with a high incidence of accidents. Different traffic flow conditions will affect the driving behavior of conditionally autonomous vehicle drivers in the foggy areas of the freeway. In this study, the experiment was carried out by using the driving simulation system. Forty-two participants drove on a foggy freeway according to two traffic conditions and two non-driving related tasks. Wilcoxon Signed-Rank Test and Survival Analysis were applied to explore the impact. The results show that the effects of different non-driving related tasks on driving behavior are mainly concentrated in the takeover process; The deceleration reaction time of the free flow (6.04 s) is much lower than that of bound flow (9.40 s); In the condition of bound flow, the driver is more inclined to slow down without braking. Potential application areas of this research comprise safety assessment of conditional autonomous driving and formulating autonomous driving policy.
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