协调信号交叉口间路段上的车辆排队模型

Vehicle queue model for link between coordinated signalized intersections

为了描述路段上车流受上、下游信号交叉口影响而产生的集结与消散现象,通过分析协调信号交叉口间路段上的车辆排队演化过程,基于冲击波理论建立了车辆排队模型。为了验证模型的有效性,应用VISSIM交通仿真软件设计模拟方案,采集每辆车在上、下游检测器处的速度及其到达时刻,根据模型计算得到55个周期的排队消散长度和二次排队长度。结果显示,排队消散长度和二次排队长度计算值与模拟值的相对误差小于10%的周期分别占72.73%和85.45%。该模型可以用于估计协调信号交叉口间路段上的车辆排队长度,为交通控制方案的优化或调整提供理论依据。

To describe the process of queue growth and dissipation on the link between coordinated signalized intersections,a vehicle queue model based on the shock wave theory was developed by analyzing the evolution of vehicle queuing.In order to validate the reliability of this model,a simulation scheme was designed by using VISSIM traffic simulation software to collect the speed and arrival time of each vehicle at upstream and downstream detectors.The queue dissipation lengths and residual queue lengths for 55 cycles were calculated from the proposed model.The outcomes reveal that the cycles in which the relative errors between the simulated and calculated values of queue dissipation length and residual queue length are less than 10% account for 72.73% and 85.45% respectively.This model can be applied to estimate the queue length on the link between coordinated signalized intersections,providing a theoretical basis for optimization or adjustment of traffic control scheme.