运用小世界理论的过街设施网络布局优化

针对过街设施利用率低、行人横穿马路等问题,对过街设施的布局进行调整.以北京市二环行人过街设施路网为例构建网络拓扑结构,验证小世界网络的适用性,并基于小世界网络理论对过街设施间距较大的宣武门东大街、崇文门西大街、西长安街三个路段进行优化.结果显示,平均最短路径长度为2 702.916 m,比优化前减少254.842 2 m,聚类系数为0.793 9,优化后过街设施的合理间距为289 m.

Network layout optimization of pedestrain crossing facilities based on small world theory

The unreasonable layout of pedestrian crossing facilities leads to the unbalanced development of crossing facilities, some of which are crowded, and some of which have low utilization rate. In order to maximize the utilization of resources and ensure the safety of pedestrian crossing, it is necessary to adjust the layout of crossing facilities. Firstly ,taking Beijing Second Ring Pedestrian Crossing Facilities Network as an example to construct network topology structure and verify the applicability of small world network. Secondly, optimizing the three sections of Xuanwumen East Street, Chongwenmen West Street and West Chang"an Street with large spacing of crossing facilities based on the small world network theory. Finally, comparing the network characteristic parameters before and after optimization.The result shows that the average shortest path length is 2702.916, which is 254.8422m less than that before optimization, and the clustering coefficient is 0.7939. The reasonable distance between optimized crossing facilities is 289m.