Optimizing Policy on Artery Signal Control of Dual Separated Roads

The artery traffic signal control system is one of the most effective ways to reduce automobile running delay. In this paper, an artery traffic signal control optimization model is proposed based on the optimal system period and signal skewing, aiming at achieving the minimum of system delays and maximum of passing bandwidth. Taking the example of Zaojunmiao Road and Daliushu Road, an arterial dual separated road with four signalized intersections in Beijing, the paper proposes two optimization strategies of the artery signal control. The software VISSIM is used to simulate and evaluate the situations, including previous conditions and optimization. Simulation results show that the usage of overlapping signal phase generates better solutions for artery traffic control system, especially in the city like Beijing with more pedestrian volume and closer intersection layout. With the optimization control strategies advanced in the paper, it may expect that the total intersection signal delays of the roads decrease by 59.6%, and the average travel speed increases by 140.0% and 51.7% into and out of town respectively, where the traffic congestion has been greatly released.

摘要干线交通控制系统能有效减少机动车运行延误。本文以系统延误最小和绿波带宽最大为目标, 构建了基于系统周期和相位差最优的干线交通控制模型, 以双向有隔离的北京城市主干路-皂君庙路-大柳树路、含4个信控交叉口、为实例, 提出了两种线控优化方案, 通过VISSIM仿真对该交叉口及其所在路段优化前后的交通状况进行了比较。结果表明 : 在北京市这类行人流量较大、交叉口布局紧凑的道路条件下, 采用重叠相位能更好地优化线控系统 : 应用本文提出的控制策略对该路段进行线控优化后, 交叉口总信控延误减小了59.6%, 主线上的南向北和北向南平均行程速度分别提高了140.0%和51.7%, 交通运行效率显著提高。