行人车辆冲突参数分析与安全评价

Pedestrian-vehicle conflict parameter analysis and safety evaluation

摘要:

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％．

Abstract:

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.