南京市汽车和公交模式时间可达性差异分析  

Measuring modal accessibility disparity between privatecar and public transport in Nanjing

作　　者：陈杰[1,2] 王结臣[2] CHEN Jie;WANG Jiechen(Datong University,Datong 037009,China;Nanjing University,Nanjing 210023,China)

机构地区：[1]大同大学,山西大同037009 [2]南京大学,江苏南京210023

出　　处：《测绘工程》2020年第5期33-38,共6页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41571377)。

摘　　要：城市交通模式可达性差异有利于交通规划管理、土地利用以及可持续环境发展。时间/距离是可达性计算与分析的关键。本次研究是在互联网地图开放路径规划API服务支持下,以南京市较为均质分布的公共图书馆为目标,基于“门到门”的概念模型获取空间化格网至公共图书馆“完整出行链全过程”的时间成本;然后,结合最邻近设施和修正的模式可达性差距指数,比较分析南京市汽车和公交(含地铁)两种交通模式下绝对时间可达性及模式相对时间可达性差距空间分布格局和特征。研究结果表明:①南京市汽车与公交模式的绝对时间可达性差距较为显著。汽车模式时间可达性大约为公交模式的3倍;②模式相对可达性差距的空间分布具有明显的地铁和公交沿线指向性的特征,差距较小主要分布在地铁和公交沿线一定区域范围内,主城区外围地铁沿线尤为明显。同时,本文方法可为其它城市交通模式时间可达性定量研究提供科学参考。Analyzing the accessibility disparity between travel modes in cities is recognized as an efficient way to assess the sustainablility of transport,land use and environment.Travel distance/time is a key part of such an analysis.Taking relatively equally distributed public libraries in Nanjing city as object,this paper aims to assess the comparablility of travel times by private car and public transport(PT)based on open internet map navigation API(Application program interface)services.First,the travel time calculations from all the spatial grid population to the public libraries are achieved using the“door-to-door”conceptual model.Then,the nearest facility method and the modified modal accessibility gap indicator are applied to measuring and comparing the absolute and relative disparity of accessibility to the public libraries between private car and PT.The results show that:a)the absolute time accessibility disparity is notable in Nanjing city,the travel times by PT are more than three times by private car mode;b)the spatial distribution of the relative time accessibility gap has obvious characteristics of directivity along the metro and bus routes.The smaller areas of disparity are mainly distributed along the metro and/or bus routes.Meanwhile,the method of this paper provides a scientific reference for the quantitative study of time accessibility at different travel modes for other cities.

关 键 词：可达性 “门到门”模型 交通模式 出行时间 

分 类 号：P208[天文地球—地图制图学与地理信息工程]