城市局域路网交通量与OD估计集成仿真方法

Simulation Method Integrating Urban Local Network Traffic Flow with OD Estimation

为利用有限的交通采集设备,实现全面掌握城市路网交通运行状况、快速有效制定管理措施的目的,提出了一种"封闭环"式检测线圈布设方式和城市局域路网交通量与OD矩阵估计方法.以交叉口转弯比例稳定性实证研究为基础,建立理论模型,并探讨路段分配流量和OD估计唯一性问题.采用蒙特卡罗法设计车辆转弯行为仿真模型,并提出了局域路网交通量与OD矩阵估计的集成仿真方法.实例研究结果表明,其在实际路网上有良好的适用性和可靠性,可为先进交通管理系统相关交通模型的建立和交通采集设备的布设提供依据.

In order to make the best of limited traffic detectors, understand the traffic performance of urban road network,and then take effective management measures, the paper puts forward a loop detector-layout method called ＂close-loop＂,and a method for estimating link traffic flow and OD matrix for local urban road network. A theoretical model is established based on the stability test of turning split of intersections by real data,and the uniqueness of assigned link flow and OD matrix is discussed. Monte Carlo Stochastic Modeling Method is adopted to design vehicle turning behavior module,and a simulation model integrating link traffic flow and OD matrix estimation is established. The model shows better performance and applicability in real local network, and can provide reference for establishing related traffic models for advanced transportation management system（ATMS） and the layout of traffic detectors.