运用模拟方法解决步行街人车混流区问题

Application of Simulation Method to the Problem of Intersecting Flows Caused by Pedestrians and Vehicles in Walking Streets

在分析城市步行街及其周边存在人车混行、人员密度高、通行效率低、潜在的危险大的基础上,笔者用计算机模拟方法研究了沈阳市中街步行街的一个人车混行的交叉路口,实际勘察了十字路口道路格局、车流、人流状况,测量、估计通过路口的人数、流量,根据获得的数据,对不设置交通信号灯、设置信号灯、建设过街天桥或地下通道等几种情况进行模拟,得到各种情况下的通行效率,并对不同的过街方案的优缺点进行比较。最终选择过街方案需要综合考虑影响安全和效率的多种因素,包括地域、人流量、路口宽度、周边交通等因素,用较小的经济投入取得最大的通行效率。文中的模拟采用EXODUS软件。

In and around the walking street in cities, there exists a high density of people and intersec- ting flows caused by pedestrians and vehicles, this situation not only brings about low passage efficiency, but also potential dangers to people. To resolve this problem, one crossroad with the above situation in Zhongjie Street of Shenyang city is studied by computer simulation in the paper. Firstly, the layout of the crossroad, the vehicle flow magnitude and pedestrian flow condition are investigated on the field, and the number of pedestrians passing this crossroad is estimated. Then according to the above data and by use of EXODUS software, simulations are respectively conducted under different condition of the crossroad, such as with traffic lights or no traffic lights, with overpass or tunnels, so corresponding passage efficiency is obtained. Finally, the advantages and disadvantages of different crossroad situations are compared. It is conclude that the design of crossroad should take the items affecting the safety and efficiency of crossroad into thought, including the zone, flow of pedestrian, width of road, traffic situation around and so on, the goal is to obtain maximal passage efficiency with lowest invests.