Considering human factors, the automobile collision warning system should alert drivers when they perceive the collision risk firstly. In order to explore the feasibility of defining the driver's risk perception moment based skin conductance response（SCR）, one risk driving experiment with the driving simulator was designed where the leading vehicle suddenly braked during car-following process, and drivers’ skin conductance data was recorded. The research result indicated that the braking behavior of the leading vehicle could stimulate the following vehicle’s driver to produce SCR. And the male, novice and younger drivers were more sensitive to the leading vehicle braking behavior than the female, veteran, and elder drivers. This research may be meaningful to define the warning moment of the automobile collision warning system.

CICTP