Identification of Dynamic Service Bottleneck in Urban Bus Network Based on Percolation Theory

Bottleneck identification can provide a new method to improve service level of urban bus transition network. Based on the theory of traffic percolation, this paper proposes a method to determine the critical service bottlenecks that limit the overall service level and connectivity efficiency of the transit network. This method considers the characteristics of passenger flow, service, and network in the bottleneck and proposes a compound index of quantitative evaluation for the state of section service level. Taking the Shenzhen bus network as an example with the actual passenger volume data, this paper creates the dynamic network topology and identifies service bottlenecks. Finally, the applicability and accuracy of the method are verified, which is of practical significance to the operation and management of the urban bus transit system.