Based on the multi-layer network theory, the model for the double-layer network of rail-bus transit is improved, and a new integrated public transit network model is proposed. In light of the analysis method for topological characteristics of a complex network, this paper puts forward the characteristic indexes to evaluate the topological properties of the new integrated public transit network and studies the complexities of the network. Taking the integrated public transit network of Lanzhou combining rail and bus transit as an example, this paper analyzes the topological characteristics, discusses the method of identifying key nodes with centrality, and suggests optimizing the network through the key nodes. The analysis results in this paper can provide reference for the design and optimization of complex urban public transit network.

CICTP