ABSTRACT : The purpose of this study is to explain the methodology of setting an optimum value for the braking control timing of AEB system designed to prevent collision with pedestrians. For marketing the system, control intervention should be activated as soon as possible to minimize the damage caused by collision accidents and ensure that the drivers have a high trust in the system, but if the control start timing is too early and interferes with the braking operation of the drivers, then such a system may lead to excessive dependence because of over-trust. In the experiments, start timing of applying the brake by the drivers was analyzed for 15 subjects using a driving simulator. Based on the cumulative frequency analysis of the start timing of applying the brake by the drivers, experiments were conducted with the system performing braking control at 4 timings, namely 1st percentile, 5th percentile, 50th percentile, and the physical avoidance limit. An experimental study was performed in the experiments to examine whether operation interference takes place between the driver and system. In this experiment, the relation between the operation interference and the degree of dependence on the system were also examined.

Keywords -Safety, Driving Support, Overconfidence, Accident avoidance, AEB, Control Timing, Over-Trust