Since the 21st century, the macro-background of the development of world railways has undergone great changes. As a transport mode with both stronger technical and economic comparative advantages and stronger sustainable comparative advantages, the development of railways in the world presents various trends. In this paper, based on the empirical and comparative research methods, the development of railways in different countries in recent years is reviewed and compared. New trends on the development of the railway network and transport are analyzed and discussed. Some interesting conclusions are obtained.

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