福州市地铁对公共交通网络通达性的影响

在地理信息系统(Geographic Information System,GIS)技术支持下,以福州市地铁1号线作为研究对象,选取福州市三环快速路以内的城区为研究区域,构建城市公共交通网络,基于道路密度、公交站点密度等计算模型分析福州市交通网络密度分布特征.通过时间距离、通达性系数和服务区域面积三个指标度量地铁开通前后交通网络通达性及其空间格局变化.结果表明:核心城区道路资源和交通资源的分布存在极化现象;地铁1号线开通后,重要交通节点之间的平均通行时间距离缩短13.7 min;交通枢纽中心30 min服务区域面积增加了6.1%;交通网络通达性格局从以鼓楼区为中心的单核扩散格局转变为沿地铁走势的一核一轴向外扩散分布格局,城区基本形成40min交通圈,实现了福州市通达性整体优化.

The Impact of Metro Line on Public Transit Accessibility: A Case Study of Fuzhou

This paper takes Fuzhou metro line 1 as a study case, use GIS technology to analysis the density distribution characteristics of traffic road network in Fuzhou with road density and bus station density based on urban public transport network. The indexes include time range, accessibility coefficient and service scope are calculated to measure the transit network accessibility and its spatial pattern changes with the opening of the metro. The results show that the distribution of urban road resources and traffic resources is polarized; Mean transit time between important traffic nodes is reduced by 13.7 minutes with the opening of the metro; 30 minutes of the hub service area increased by 6.1%. Pattern of transportation network accessibility from Gulou centered mono-center diffusion pattern turning into a nuclear along the subway in a spread outside the axial distribution pattern. 40 minutes traffic circle of the city formed, realizing the overall optimization of accessibility in Fuzhou.