考虑下游交叉口的路段行人过街优化控制模型

为了处理好城市干道路段上行人过街安全与机动车交通效率之间的矛盾,提出了一种利用下游交叉口红灯信号时间来为路段行人提供专用过街信号相位的行人过街横道信号控制方法.它可由混合整数线性规划模型来描述,其优化目标是在保障行人过街安全和维持机动车现状运行水平的基础上,使路段过街横道行人绿灯时长最大化.通过VISSIM仿真和实例分析,对该信号控制设计方法的效果和可操作性进行了验证.研究表明,对于有行人中央驻足区的情况,过街横道可设置于路段任何需要的位置,且总能计算得到合适的信号配时方案;对于无中央驻足区的情况,应将人行横道设置位置与信号配时同时考虑才能实现良好的设计效果.

Signal Control Model for Mid block Pedestrian Crossing with Consideration of Downstream Intersection

In order to deal with the confliction between the safety of the pedestrian crossing and the efficiency of the vehicle traffic on urban arterial, this paper proposes a method for signal designing of mid block pedestrian crossing, which provides an appropriative signal phase for the pedestrian by using the red time of the vehicle at downstream intersection. The method is formulated as a mixed integer linear programming. The control objective is to maximize the duration of green for pedestrian on the basis of ensuring the safety of the pedestrian crossing and maintaining the efficiency of the vehicle traffic in status quo. The effect and the maneuverability of the control method are tested by VISSIM simulation and case study. Results show that in the case of successive crossings, the pedestrian crossing can be located at anywhere of the road section and the suitable signal timing can always be made. And in the case of non stop crossing, the designing of the location of pedestrian crossing and signal control should be considered synchronously.