Topological Consistency of Multimodal Composite Transportation Network

City transportation has transformed from single modal to multimodal composite transportation system. Compared with single modal network model, multimodal composite transport network model adds the concept of mode transfer; therefore its topological consistency maintenance is more complex. Aimed at the difference and complexity between single mode and multimode, this paper analyzes the changing types in multimodal network, presents the topological consistency maintenance methods for these typical changing types. Test shows that these methods can correctly maintain the topological relationship of multimodal network. The method presented in the paper provides valuable references for study on topological consistency of multimodal network.