Evaluation and Optimization Strategies for Urban NighttimeBus Network Based on Social Network Analysis
To evaluate the rationality of the nighttime bus network structure in large cities and identify its core areas,this article uses the Social Network Analysis(SNA)method to study the nighttime bus network in Nanjing.Firstly,the paper collects information on nighttime bus routes and transfers in Nanjing,and draw a social network adjacency matrix for nighttime buses from the perspective of"social relationships";Subsequently,centrality analysis and cohesive subgroup analysis were conducted on the nighttime bus network to obtain individual and structural information.The research results showed the importance distribution of nighttime bus routes and the core areas of the network.Finally,based on the characteristics of nighttime travel demand,suggestions are proposed to optimize the nighttime bus network from the aspects of route layout,core routes group setting,etc.,in order to improve the operational efficiency and service level of the nighttime bus network,thus promote the construction of the"nighttime travel circle".