How fast is it to city centers?The average travel speed as an indicator of road traffic accessibility potential  

作　　者：Xiao-guang RUAN 

机构地区：[1]College of Geomatics and Municipal Engineering,Zhejiang University of Water Resources and Electric Power,Hangzhou 310018,China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2022年第8期621-638,共18页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：supported by the Zhejiang Provincial Natural Science Foundation of China(No.LZJWY22E090002);the Zhejiang Provincial Water Conservancy Science and Technology Plan Project(No.RC2141),China。

摘　　要：Transportation is the lifeblood of a modern metropolis.Accessibility generally refers to the interconnection between nodes in a regional traffic network.The purpose of the paper is to obtain more realistic and accurate measures of travel speed and to study the road traffic accessibility potential in cities.This study proposes a method for analyzing road traffic accessibility potential which is based on the average travel speed to city centers in off-peak times and which ranks 80 cities around the world.Based on the Suomi National Polar-Orbiting Partnership satellite’s visible-infrared imaging radiometer suite(NPP-VIIRS)night-time light data,urban built-up areas and city centers were extracted.Further,with the aid of the Google Maps application programming interface(API)network crawling technique,travel times and travel distances for several optimal routes to city centers by car were obtained.Feasible proposals for improving road traffic accessibility and planning urban transportation in different cities are presented.The proposed method offers a new possibility of analyzing traffic accessibility using internet data and geo-spatial methods.

关 键 词：Traffic accessibility Google Maps application programming interface(API) Travel speed Road traffic network Geographic information system(GIS) 

分 类 号：U491[交通运输工程—交通运输规划与管理]