A study on the Onset Timing of Collision Avoidance Assistance System for Minimizing the Over-reliance on the System

Abstract

We analyzed the drivers' braking behavior in view of the level of over-reliance on the system, for designing Forward Collision Avoidance Assistance System (FCAAS). In a condition when the system was activated at the timing showing Time to Collision is less than 1.7s, no driver showed the over reliance on the system. In this condition, the drivers' braking timing was earlier than the system operation. We think that Time to Collision will be an effective state variable for the analysis of the reliance level on the system, and the timing standing at Time to Collision is less than 1.7s is one of the optimal conditions for the onset of FCAAS, in view of minimizing the over reliance on the system.