| Summary: | This paper selected the 2008-2018 panel data of 31 provinces, cities, autonomous regions throughout the country, adopted fixed effects model and used moderating effect to study the influence of traffic infrastructure on economic growth. And the research has found: From the national perspective, roads perform better than railways on economic growth and railway's leading role of the economy increases gradually; In terms of regulating effect, the effect of railway on economy is more restricted by the level of urbanization, and the higher the level of urbanization, the more significant the effect; In terms of control variables, labor input and investment level significantly promote economic growth.
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