行人与右转车辆冲突严重度评估  

Evaluation of the conflict severity between pedestrians and right-turning vehicles

作　　者：兰柳亭 徐磊[1] 龚毅 张磊 彭金栓[1] LAN Liuting;XU Lei;GONG Yi;ZHANG Lei;PENG Jinshuan(College of Traffic&Transportation,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学交通运输学院,重庆400074

出　　处：《重庆理工大学学报（自然科学）》2022年第7期70-77,共8页Journal of Chongqing University of Technology：Natural Science

基　　金：重庆市自然科学基金项目(csts2018jcyiAX0288);重庆市研究生导师团队建设项目(JDDSTD2018007);山地城市交通系统与安全重庆市重点实验室开放基金项目(KTSS201602)。

摘　　要：为降低车辆与行人冲突潜在危险,针对右转机动车与过街行人进行人车冲突严重度量化分级研究。以重庆市南岸区3个典型交叉口为例,采用实地调查和视频采集相结合的方法调查晚高峰时段人车冲突数据,利用Tracker软件提取冲突样本的人车运动轨迹和运动参数。选取碰撞时间(time to collision,TTC)、安全减速度(deceleration to safety time,DST)和后侵占时间(post encroachment time,PET)为冲突指标,分析冲突指标、冲突类型及冲突点位置分布特征,并通过k-means聚类算法评估交叉口冲突严重程度。结果表明:TTC和PET与冲突严重程度呈负相关关系,DST与冲突严重程度呈正相关关系,模型聚类效果较好;不同过街冲突类型的冲突严重度存在差异,过街行人数量和人车相对距离对冲突严重程度存在显著影响。To reduce the potential danger of conflicts between vehicles and pedestrians,a quantification and classification study of serious pedestrian-vehicle conflicts is carried out for right-turning vehicles and crossing-road pedestrians.Taking three typical intersections in Nan’an District of Chongqing City as an example,the method of combining field investigation and video acquisition is used to investigate the data of conflicts between pedestrians and right-turning vehicles during the evening peak hours.The tracker software is used to extract the trajectories and motion parameters of the conflict samples.Select time to collision,deceleration to safety time,and post encroachment time as conflict indicators to analyze the conflict indicators,conflict types,and the distribution characteristics of conflict points.The k-means clustering algorithm is used to evaluate the severity of intersection conflicts.The results show that TTC and PET are negatively correlated with the severity of conflicts,and DST is positively correlated with the severity of conflicts,and the clustering effect of the model performs well;the conflict severity of different types of crossing conflicts is different,and the number of crossing-road pedestrians and the relative distance between pedestrians and right-turning vehicles have a significant impact on the severity of conflicts.

关 键 词：人车冲突 k-means聚类分析 冲突严重度 行人过街 

分 类 号：U491.2[交通运输工程—交通运输规划与管理]