Evolution of High-Speed Transport Superiority and Its Differentiated Population and Economic Responses:A Case Study of Shandong Province
Using the methods such as improved high-speed transport superiority degree,Pearson correlation and Geodetector,this paper explored the differences in the development of high-speed transport among counties in Shandong Province in 2010,2015 and 2020,as well as the response and influencing factors of changes in population and economic conditions during this process.It is found as follows.① During the study period,the high-speed transport network density exhibited a multi-layered"center-periphery"structure with no clear transition between circles.The influence degree of high-speed transport mainlines displayed a"strong point superposition"pattern,evolving from a"double core-single axis"to a"T-shaped double axis"and finally to a"networked point-axis system".The improvements of high-speed transport accessibility were notable in remote areas,though spatial differentiation due to location remained significant.② High-speed transport advantageous areas were primarily concentrated in municipal districts,resulting in a circular distribution of high-value areas.Significant growth of high-speed transport superiority degree was observed in various regions during the study period,with inter-county differences tending to decrease.③ Counties with larger populations and economic scales typically had higher high-speed transport superiority degree.However,increases in high-speed transport superiority degree did not necessarily correlate with simultaneous population and economic growth,as changes varied among different counties.④ Proximity to high-speed trunk lines and air transportation accessibility significantly influenced population and economic changes.The combination of different high-speed transportation modes,as well as them with socio-economic characteristics demonstrated a non-linear enhancement in explanatory power.Although the individual explanatory effects of motorway density,airport's influence,and high-speed railway accessibility were not significant,their combination with location and socio-economic characteristics well explained changes in population and GDP.
high-speed transport superiority degreetemporal and spatial evolutioncorrelationdifferentiated responsesGeodetectorShandong Province
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