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As the backbone of the comprehensive transportation system, rail transit network has significant support and guidance on the formation and development of metropolitan area. Firstly, this paper constructs the Rail Transit-Compactness of metropolitan area model to explore the empirical effect from rail transit on the compactness with the data of China's top ten metropolitan areas. Secondly, use DEA to evaluate the efficiency of rail transit network of China's top ten metropolitan areas. Thirdly, results show the rail transit variables have a significant positive impact on the compactness of metropolitan area, but this effect has time lag. The efficiency of rail transit network with China’s top ten metropolitan areas still need to be improved. Lastly, analyze the causes hindering the efficiency improvement of rail transit network and give some suggestions to these problems respectively.

Empirical Analysis on the Influence of Rail Transit Network on the Compact Development of China’s Metropolitan Areas