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二次过街信号设计对于行人通过大型信号交叉口具有非常重要的作用。本文提出了行人信号相位与原机动车信号相位进行叠加组合的相位设计方法，并分析了在不同的机动车信号相位条件下和二次过街设置方式下的行人信号相位设计方案。为对可选信号相位设计方案进行比较，本文构建了各周期内各驻足区行人平均最长等待时间模型，并建立了评价行人二次过街信号相位设计方案的仿真分析模型。最后针对一个实际交叉口，应用提出的信号相位设计方法和仿真模型进行了分析研究。

Design and Simulation on Signal Phase for Pedestrians Twice Crossing at Large Signalized Intersections

Designs on signal phases for twice crossing are very crucial to pedestrians when they are passing through a large signalized intersection.A method overlapping and combining the phases of pedestrian and vehicle signals is proposed.The detailed schemes of signal phases has been work outed considering different vehicle signals and the setting conditions for twice crossing.Comparing the schemes for signal phase design,the simulation model to evaluate them is constructed by maximum averaged waiting time on waiting areas(including safety island) within a signal cycle.The proposed method has also been employed to analyze the scheme of signal phases for pedestrian twice crossing on a practical signalized intersection.