Research on the Impact of the Construction of Zhengxi High-Speed Railway on yhe Population Agglomeration of Cities Along the Line

As an important type of transportation infrastructure in contemporary China, the construction of high-speed rail can effectively promote regional population flow and improve regional connectivity. Taking the Zhengxi high-speed railway as an example, this study uses the dynamic monitoring data of population flow from 2009 to 2013 to construct a dynamic spatial panel model by introducing the method of lagging the urban population size by one period, so as to explore the spatiotemporal effect of the construction of the Zhengxi high-speed railway on the population flow of cities along the line. The results show that the impact of Zhengxi high-speed railway on population agglomeration is reflected in the agglomeration effect and dispersion effect. The impact of Zhengxi high-speed railway on urban population agglomeration along the line is heterogeneous.