针对短连线交叉口传统信号配时方案造成的车队排队超过路段距离,车流上溯诱发上游交叉口拥堵的难题,建立信号周期模型。以通行能力与车均延误时间之比最小为目标函数,以进口道车辆最大排队长度为约束条件,利用线性规划理论求解,同时探讨模型成立条件。最后选取实例,进行验证,仿真后提出相应评价参数与传统信号配时方案进行对比。
In view of traditional signal timing scheme of short line intersection causing the queue line up more than road distance and consequently causing the traffic congestion due to upstream intersection, the signal cycle model is established. The minimum function is the ratio of capacity is objective and vehicle delay time and the maximum queue length is the constraint condition, the linear programming theory is used to explore the conditions of the establishment of the model. An engineering practice is selected to verify, and corresponding evaluation parameters are extracted after simulation, and compare with the control effect of traditional signal timing scheme. The results indicate that the control effect of signal timing scheme is better than that of the traditional signal timing scheme.