钩形弯交叉口信号协同控制优化方法研究

Optimization of coordinated signal settings for hook-turn intersections

针对车辆在钩形弯交叉口与相邻常规交叉口间的整体运行特性,建立了各条车道的车辆平均延误计算模型。以各交叉口的周期时长和相位绿灯时间为约束,钩形弯交叉口与相邻常规交叉口间的车辆平均延误最小为目标,建立了信号协同配时方案。以位于苏州市高新区内有轨电车沿线的两个相邻交叉口为例,采用实际数据验证所建立的方法,并设置钩形弯渠化方案。将设置的钩形弯交叉口与其相邻常规交叉口的信号协同作为改进方法,在VISSIM软件中对比分析改进方案与现状方案的车辆延误指标。实验结果表明,钩形弯交叉口与相邻常规交叉口的信号协同优化方法可有效提高交叉口的通行能力,尤其是干道直行机动车的通行能力,可降低车辆的平均延误。

A mathematical model for calculating the average delay of vehicles in each lane was established according to the running characteristics of vehicles between a hook-turn intersection and adjacent conventional intersection.Taking the minimum average delay of vehicles as the objective function and the cycle length and green time as the constraints,a coordinated optimization model was established.Finally,taking two adjacent intersections in Suzhou as an example,the established method was tested on the collected data.The hook-turn intersection was set up and the signal coordination between it and the adjacent intersection was established as the improvement method.The vehicle delay in the improvement scheme and the current scheme were compared and analyzed using VISSIM software.Experimental results show that the coordinated optimization model of signals between hook-turn intersections and adjacent intersections can effectively improve the traffic capacity of intersections,especially the capacity of vehicles on straight roads,and reduce the average delay of vehicles.