信号控制交叉口实时延误计算与仿真研究

信号控制交叉口实时延误计算模型是实时自适应交通控制系统核心模型之一。在HCM2000中提出的延误模型的基本假设决定了其在计算实时延误方面的局限性。根据车辆延误产生的基本原理，建立了基于上、下游检测器数据实时车均延误计算模型，并对模型进行了平滑处理。Vissim仿真结果显示，在不同流量的情况下，笔者提出的模型比HCM的延误模型的计算结果更能反映真实延误值随车流量的波动而变化的趋势。仿真还发现，以2个周期为单位经移动平均处理后，模型计算结果与真实值吻合程度较好。最后，对模型的适用条件进行了分析。

Real-time Delay Model and Simulation for Signalized Intersection

Accurate real-time delay model of signalized intersection is one of the cornel models of real-time traffic control system. The basic hypotheses of HCM and other delay models restrict its adaptability in calculating real-time traffic delay. A real-tlme delay model based on both stopline and upstream detectors was proposed. The smoothness of the model was also done. The results of simulation by high performance software Vissim indicates that the proposed model is better than HCM in performance when calculating real-time traffic delay. The cycle of smoothness has affected the results. The results of the model are close to that of simulation under certain degree of saturation of the approach. Finally, the conditions under which the model is applied are also analyzed.