信号交叉口排队溢流控制触发条件及方案设计

Triggering Conditions and Scheme Design of Queuing Overflow Control at Signalized Intersections

为得到信号交叉口车辆排队溢流控制方案触发临界条件,提出了信号交叉口进口道最大广义排队长度及路段允许车辆排队长度计算方法,在此基础上提出基于上游交叉口关联相位剩余存储能力的绿灯时间压缩法.考虑控制方案的平滑过渡性,提出了等距逐周期的绿灯时间压缩方法.最后通过VISSIM仿真实验,将所提控制方案与既有常用控制方案比较分析.仿真结果表明,所提控制方案能够有效降低溢流相位排队长度及平均延误,同时不对关联相位产生过大负面影响.

In order to obtain the triggering critical condition of the vehicle queuing overflow control scheme at signalized intersection,a calculation method of the maximum generalized queuing length at the entrance of signalized intersection and the allowable vehicle queuing length at the road section was proposed.On this basis,a green light time compression method based on the residual storage capacity of the associated phase at the upstream intersection was proposed.Considering the smooth transition of the control scheme,a green light time compression method with equal intervals and cycle by cycle was also proposed.Finally,through VISSIM simulation experiment,the proposed control scheme was compared with the existing common control scheme.The simulation results show that the proposed control scheme can effectively reduce the queue length and average delay of overflow phase without having too much negative impact on the correlation phase.