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采用停车线法建立了多相位信号交叉口通行能力模型,并对直行车道和左转车道均为一条以及直行车道为2条而左转车道为一条这2种常见状态下建立的模型进行了简化,结果表明信号交叉口通行能力主要和信号周期长度、相位配置、交叉口几何设计和车辆跟车时距等因素有关.考虑车辆到达率时的信号周期长度和相位配时设置问题,建立了基于各相位剩余时间均衡的优化模型,并采用拉格朗日乘子法对优化模型进行求解,从而确定出信号周期最佳时长以及各相位时长的计算模型,并对模型进行了简化.所建立周期和相位时长的计算模型较现有的模型更简便实用.最后,选取了一个实际的交叉口,用所建立的模型对其周期和相位时长进行了设计.
The parking capacity method was used to establish the multi-phase signalized intersection capacity model, which was simplified in two common models: straight lane and left lane and two straight lane and two left lane. The results show that the capacity of signalized intersections is mainly related to the length of signal period, phase configuration, geometric design of intersections and the distance between vehicle and vehicle, etc. Considering the signal period length and phase timing setting of vehicle arrival rate, The remaining time of each phase balance optimization model, and use the Lagrange multiplier method to solve the optimization model, so as to determine the best signal period and the phase length of each phase of the calculation model, and the model was simplified. The establishment of the cycle And the phase length of the model is more simple and practical than the existing model.Finally, we choose an actual intersection, and design the cycle and phase duration with the established model.