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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。
Aiming at the problem that the queue queuing caused by the traditional signal timing scheme of the short-connected intersection exceeds the distance of the section and the traffic flow induces the congestion at the upstream intersection, a signal periodic model is established. Taking the minimum ratio of traffic capacity to the average vehicle delay time as the objective function, the maximum queuing length of imported vehicles is taken as the constraint condition, and the linear programming theory is used to solve the problem. At the same time, the conditions for the establishment of the model are discussed. At last, the example is selected for verification, and then the corresponding evaluation parameters are compared with the traditional signal timing scheme after simulation.