Abstract:

The statistical analysis is used to compare the safety risk between the intersection of the reverse variable lane and the conventional intersection. The results show that the ratio of pre-signal red light crossing at the intersection with reverse variable lane is significantly increased. The average speed of driving in the lane is reduced by 15.31% . And also the feature of release and the spatial trajectory of the intersection with reverse variable lane are analyzed through probability statistics and video processing technology. Conflicts between the traffic flow of reverse variable lane and traffic flow of left lane are determined by using the traffic conflict technique (post encroachment time) and the test is carried out with the dual left-turn lanes to find out that setting reverse variable lane increase the level of interference between the intersection of left-turn traffic flow. The results of this study may help to provide a theoretical basis for the setting of reverse variable lane and improve the safety of the intersection with the reverse variable lane.

Key words: traffic engineering, safety evaluation, statistic analysis, reversing variable lane, release characteristics

摘要：

运用统计分析比较了设置逆向可变车道的交叉口与常规交叉口之间的安全风险，结果显示设置逆向可变车道的交叉口预信号红灯违规比例明显提高，并且对向车辆在逆向可变车道内行驶的平均速度降低了15.31%；运用概率统计及视频处理技术分析了设置逆向可变车道的左转车流在交叉口内的释放特性及其空间轨迹特点；采用交通冲突技术(后侵入时间)来确定逆向可变车道的车流与左转专用车道的车流在释放过程中的冲突程度，并与双左转车道进行显著性检验，结果显示设置逆向可变车道会增大交叉口内部左转车流之间的干扰程度. 研究成果有助于提高设置逆向可变车道交叉口的安全性.

关键词: 交通工程, 安全评价, 统计分析, 逆向可变车道, 释放特性