两相位信号交叉口专用左转车道车辆运行特性研究

Research on operational characteristics of vehicles on exclusive left-turn lane of signalized intersection with two phases

对两相位信号交叉口专用左转车道上的车辆运行特性进行了理论分析 ,给出了车辆实现左转的 3种可能方式及影响车辆实现左转的各项因素。利用概率论方法 ,推导出车辆利用 3种方式实现左转的概率公式及其适用条件 ,并给出了计算步骤。讨论了左转车辆到达分布的确定依据和参数估计方法 ,推荐直行车辆车头时距分布采用威布尔分布并建议采用图形法求解参数。

This paper analyzes the operational characteristics of vehicles on exclusive left-turn lane of signalized intersection with two phases and presents three left-turn modes of vehicles and influencing factors.Using probability theory,the paper develops three probability equations of realizing left-turn and respective applicable conditions.The calculation approach is also brought forward.The paper discusses how to determine the distribution of arrival of left-turn vehicles and the parameter estimation methods.Weibull distribution is recommended as headway distribution of through vehicles and figure method is to be adopted to get the parameters.