行人车辆冲突参数分析与安全评价

摘要

To evaluate the pedestrian-vehicle conflict safety in mixed traffic condition,this paper analyzes and compares the commonly used parameters on traffic conflict and presents a model to classify independent pedestrian-vehicle conflict safety.The model is validated by using video data from two different traffic scenes.The result shows that the pedestrian-vehicle conflict safety is highly sensitive to the Time Difference to Collision(TDTC) parameter and the vehicle speed.The closer to zero a TDTC value is and the faster a vehicle is,the more dangerous a pedestrian-vehicle conflict may be.Comparing with independent observation,the model can correctly classify about 86.2% conflicts;only 2.1% conflicts are classified as safer by the model.%为了评价混合交通环境中的行人和车辆冲突的安全性,对比分析了目前常用的行人车辆冲突参数,提出了个体行人和车辆之间冲突的安全评价模型,并将模型应用于不同的混合交通场景,验证模型的鲁棒性和适用性.结果表明,冲突时间差（Time difference to collision,TDTC）和车辆速度对行人车辆冲突的安全性影响最大.TDTC越接近于零,行人越危险;车辆速度越快,行人越危险.以此建立的行人车辆冲突评价模型可正确评估86.2%的行人车辆冲突安全,对于危险冲突的漏检率为2.1%.