Estimation and Evolution of Urban Road Accessibility in Chinese Mainland
This study establishes three road accessibility indicators based on the road network data in Chinese mainland,and analyzes the spatial characteristics and evolution of the road accessibility in 334 cities of China from 1980 to 2019.The results show that:1)From 1980 to 2019,the average value of geographic accessibility decreased from 47.60 hours to 17.92 hours.Thereinto,the reduction in average travel distance contributed 8.7％,while the increase in average travel speed contributed 91.3％.2)The geographic accessibility and the overall economic accessibility both show a"core-periphery"feature,and the regions with fastest improvement in the above two indicators coincide with the regions with high economic growth potential.However,the highest road accessibility regions are not the most developed regions.3)The regional economic accessibility shows that cities with advanced accessibility locate in a belt-like regions along the eastern coastal region and disperse in inland region.Regions with superior regional economic accessibility mostly overlap with the most economic developed areas.Therefore,it is necessary to choose different indicators to analyze the impact of road transportation network on the economy.
NETL
NSTL
万方数据
