Research on the Maturity of Urban Rail Transit Network Based on Complex Network

Based on the complex network theory, the urban rail transit networks of ten Chinese cities with relatively developed rail transit systems were selected as research objects, and the topological model of the rail transit networks of the case cities was constructed using the Space L method, with complexity, connectivity, and extensibility as macroscopic feature metrics, and node average, tightness centrality, mesoscopic centrality, average path length, and average clustering coefficient as microscopic feature metrics, combining macro and micro characteristic indicators, the entropy weight method is used to determine the weight of each indicator, and the TOPSIS method calculates the comprehensive score index and the maturity analysis of typical urban rail transit network in China is conducted based on the calculation results. The results indicate that: Most of China's urban rail networks are still in the early stage of development, and the line network structure is still immature, but the primary network architecture has been built. Among them, Shanghai's rail line network is at the fourth stage of maturity, with a high degree of line development and a dense network. Beijing, Tianjin and Chengdu are in the third stage. Their development degree is low compared with Shanghai, which has formed a relatively complete rail network system. Wuhan, Zhengzhou, Guangzhou and Chongqing are in the second stage, and the basic structure of their rail network has been built, but the network tightness is not yet high. Xi'an and Nanjing are in the first stage of maturity. The development of their rail transit systems is still in the early stage, with a few complete and formed rail transit lines and closed lines.