摘要
针对高速公路施工区的交通安全问题以及施工区普遍存在的持续时间较短、积累的事故数据难于满足统计分析要求的现实情况,探讨了基于交通冲突替代交通事故的交通安全分析方法。通过采集和分析处理高速公路半幅封闭施工区和单向超车道封闭施工区合流段和施工区段的车型、车速、车头时距等基于车辆个体的交通参数数据,提出了基于避免碰撞时间(TTC)的追尾冲突数计算方法和基于避免碰撞减速度(DRAC)的追尾风险度计算方法。应用上述方法评价了典型施工区合流段和施工区段的追尾冲突状况。研究结果表明,2种事故数据替代方法均可从不同侧面量化描述追尾冲突的发生状态。
Since the duration of freeway work zone is short and the accidents during this period can not meet the requirement of statistical analysis,the traffic conflict technique is employed to analyze the safety situation of freeway work zone.Firstly,the traffic data of vehicles through the merging area and working area of the closed one-way work zone and closed passing-lane work zone are collected and analyzed.These data include the vehicle type,speed,time headway and others based on the features of individual vehicle.Secondly,two methodologies are developed.The first is based on time to collision（TTC）,which can calculate the rear-end conflict number,while the second is based on deceleration rate to avoid crash（DRAC）,which can determine the rear-end risk.Furthermore,the rear-end conflict situation of the typical work zones＇ merging area and working area is evaluated by the methodologies mentioned above.The results show that these surrogate measures can quantitatively describe the rear-end conflict situation from different aspects.
出处
《交通信息与安全》
2012年第6期6-10,共5页
Journal of Transport Information and Safety
基金
黑龙江省交通厅科技项目(批准号:2010-2012)资助
