Analysis on the structural characteristics of urban rail transit network

This paper selects 12 typical urban rail transit networks at home and abroad to analyze the network topology, and the macro characteristics of the networks are studied from three aspects of development level, network form and structure efficiency. Four indicators, namely complexity and connectivity, extensibility and directness, are selected as characterization indicators. The research results show that: Hangzhou and Zhengzhou belong to the regional access network, which is in the initial stage, and the development level and structural efficiency of the network are low; Guangzhou, Shenzhen, Nanjing, Wuhan, Chengdu and Chongqing belong to the central coverage network, which is encrypted on the basis of regional access, but because of the large range of urban rail transit services, there is still room for encryption; Beijing, Shanghai, Tokyo and Paris are integrated networks, and the development level and structure efficiency of the network are relatively mature, and there are two strategies of "priority access" and "priority coverage". At the same time of urban rail transit planning and construction, we should consider the different functions of urban (suburban) railway, intercity railway and trunk railway, establish a perfect rail transit system based on the spatial scale, promote the "four networks integration" and support the development of metropolitan area, metropolitan area and urban agglomeration.