Driver Risk Perception model under Critical Cut-in scenario
In China Cut-in scenario is quite common on both highway and urban road with heavy traffic and usually has a certain risk. While, research on the driver’s risk perception of Cut-in scenario is few. When facing a cutting-in vehicle, driver tends to brake in most case. The timing and dynamic characteristic of driver’s brake maneuver is the direct indicator of driver’s subjective risk perception. The objective risk evaluation factors include TTC (Time to collision), THW (Time Headway), longitudinal relative distance and lateral relative distance et al.. This paper aim at building a model quantitatively revealing the relationship between drivers’ subjective risk perception and the objective risk evaluation factors. Data is from China-FOT database, which has a travel distance about 130 thousand miles. It is found that in Cut-in scenario, driver tends to brake when the cutting-in vehicle right crossing line, and this time point is defined as initial brake time t_IB.