Relationship between Driver's Feeling and Vehicle Operating Characteristics on Urban Road

Besides the vehicle factory performance, the driver's driving perception also influences on vehicle running characteristics which have been recognized in general. However the quantitative and empirical research through field experiments is still relatively limited. Based on the driving perception and the physical force analysis, the vehicle operating states were divided into three states which were fit and acceptable, not fit but acceptable, and unacceptable state. The vehicle operating states of drivers were evaluated by a combination method of the travel feeling data recorded by an accessory experiment person and the travel speed data collected by a high precision GPS. Then, according to the Raft's critical gap method, the critical points of the three states were acquired. The results show that if the driver is in an acceptable state, the vehicle acceleration range is from 0 to 3.28m/s(2) (or the vehicle deceleration range is from -3.48 to 0m/s(2)). And it will not be outside the range if vehicles run normally. The results have great value on understanding of the vehicle operating characteristics, and the traffic simulation parameter calibration.