Analysis of driving reliability under non-free flow condition

Congestion on road often leads to vehicles driving in a non-free flow condition. In order to study the driving reliability under non-free flow condition, a driving simulation experiment was designed and then conducted on the simulator with eight degrees of freedom to collect characteristics of driving behavior in the driving process of perception, decision and operation. Driver´s reaction time of acceleration and deceleration, change rate of visual angle, estimation of speed and space between two vehicles, and memory capacity of information in surrounding environment were determined as four main factors affecting the driving reliability. They were explored in depth respectively to obtain the variation trend under non-free flow condition. The results were analyzed in a quantitative method and offers practical information to the further study of driving reliability and road safety.