【摘要】 对行人穿越道路造成交通运行拥堵状况进行预测,将有利于进一步查找造成交通拥堵的深层次原因,提供设置行人过街设施或限制行人过街依据。采用传统仿真方法,仅能得到宏观物理量的统计分析结果,缺乏行人穿越对交通系统影响的实时动态分析。针对上述问题,提出了一种新的适用于行人穿越道路的仿真方法。首先建立行人与车辆宏观交通多相流模型以及行人穿越道路过程物理模型,然后采用无网格粒子仿真方法对所建立的宏观交通多相流模型进行离散,建立仿真粒子与真实车辆及行人之间的对应关系,得到了行人穿越道路过程中行人与车辆在道路上的实时分布状况,分析了行人穿越过程造成的交通波传播特性,同时得到了不同行人流密度情况下对交通流动状态的影响。所得结果与实际交通状况吻合较好,有效预测了行人穿越道路造成交通运行拥堵的原因,同时为研究不同因素对交通运行状况的影响提供了一类新的仿真方法。更多还原

【Abstract】 The prediction of traffic congestion caused by pedestrian crossing is helpful for further finding the underlying causes of traffic congestion and providing the basis for setting up pedestrian crossing facilities or restricting pedestrians crossing the street. In the paper,a new simulation method for pedestrian crossing is proposed. Firstly,the macro traffic flow model of pedestrian and vehicle was established,and the physical model of pedestrian crossing road was established. Then the method of meshless particle simulation was used to discretize the established macroscopic traffic multiphase flow model,and the corresponding relationship between the simulated particles and the real vehicle and pedestrian was established. The real-time distribution of pedestrian and vehicle on the road was obtained,and the traffic wave propagation characteristics during pedestrian crossing were analyzed. At the same time,the influence of different pedestrian density on traffic flow condition was obtained. The results were in good agreement with the actual traffic conditions,which can predict the traffic congestion caused by pedestrian crossing and provide a new simulation method to study the influence of different factors on traffic operation.更多还原