The impact of highway on urban polycentric spatial structure
In recent years,the focal point of policy attention has revolved around how to adapt to new circum-stances and implement regional optimization and spatial governance.Chinese government has recently emphas-ized the construction of a series of well-connected suburban new cities,aiming to drive the development of polycentric urban centers and suburbanization.Consequently,the current policy emphasis is on advancing the rational layout of internal urban spaces through planning and governance,optimizing the internal spatial struc-ture of cities.From a practical perspective,over the past two decades,the internal spatial structure of most Chinese cities has indeed undergone a transition from a single center to multicenter.While factors influencing the internal spatial structure encompass aspects like natural endowments,economic levels,public services,and transportation conditions,the research on these influencing factors has been insufficient due to data limitations and the complexity of real-world issues.Simultaneously,significant transformations have occurred in China's highways over the past two decades.Numerous studies have confirmed their crucial role in promoting regional coordinated development and reshaping urban systems.However,there has been a prolonged neglect of the im-pact of highways on the internal spatial structure of cities.Against this backdrop,this study,utilizing the ana-lysis framework of the urban polycentric spatial structure model,specifically elucidates the impact mechanism of highways on the polycentric spatial structure.Simultaneously,based on high-resolution global population distribution data from LandScan from 2001 to 2019,we constructed multiple sets of indicators for the poly-centric spatial structure.Employing historical transportation routes,planned routes,and other instrumental vari-ables,we systematically identified the impact effects of highways on the polycentric spatial structure.The res-ults show that:1)Polycentric spatial structure has become a primary development trend within China's urban areas.2)Ray-shaped or peripheral transit highways can enhance the regional advantages of peripheral areas and accelerate the transformation of spatial structure from monocentric to polycentric by agglomeration of land,development zones,enterprises,and population factors.3)Large cities,eastern and southern cities and cities with low government financial capacity are more effective in shaping polycentric spatial structure of highways.The approach provides insights into using spatial big data technology for researching urban economics issues.The study's conclusions supplement empirical evidence on the role of transportation infrastructure construc-tion in promoting factor mobility and shaping spatial structures.The study holds significant policy implica-tions for further optimizing the layout of transportation infrastructure,exploring the advantages of polycentric spatial structures,and enhancing urban economic and population carrying capacity.
highwayurban spatial structurepolycentric spatial structurefactor flowspatial big data
NETL
NSTL
万方数据
