设有逆向可变车道交叉口信号配时模型研究

Research on Signal Timing Model of Intersection with Reverse Variable Lanes

针对城市交叉口设置逆向可变车道(RVL)使用不合理的问题,通过分析RVL冲突点和相位设置方案,结合RVL的长度及交通流的到达分布模型,对设有RVL进口道左转交通量进行分配,以交叉口平均延误和通行能力为优化因子,将现有配时方案的延误结果及总通行能力与原始配时方案的结果相对比,结合信号周期、饱和度,以及流量建立多目标函数模型.以武汉市武珞路-中南路交叉口为例,对高峰时段及平峰时段进行寻优,结果表明:模型能够降低交叉口平均延误,提高通行能力,且高峰时刻更为显著.

In view of the unreasonable use of reverse variable lanes(RVL)at urban intersections,by analyzing the RVL conflict point and phase setting scheme,combining with the length of RVL and the arrival distribution model of traffic flow,the left-turn traffic volume at the entrance with RVL was allocated.Taking the average delay and capacity of intersections as optimization factors,the delay results and total capacity of the existing timing scheme were compared with those of the original timing scheme,and a multi-objective function model was established by combining the signal period,saturation and traffic flow.Taking Wuhan Wuluo Road-Zhongnan Road intersection as an example,the peak hours and flat peak hours were optimized.The results show that the model can reduce the average delay of intersection,improve the capacity,and the peak hours are more significant.