Accessibility of Integrated Passenger Transport Network for Urban Agglomeration Considering Travel Impedance
In order to clarify the multi-layer spatial structure of integrated passenger transport network for urban agglomeration and enrich its functional attributes,a new model of integrated passenger transport network for urban agglomeration considering urban transport transfer is proposed from a new perspective of coupling,and the accessibility of nodes and networks is analyzed from the perspective of travel cost and travel time.Firstly,the highway subnet and the railway subnet are constructed based on Space-P modeling method of complex network theory.The passenger stations in the urban agglomeration are abstracted as nodes in the network and numbered,and the edge weights are calibrated by travel fare and time.Secondly,the central urban area of each city in the urban agglomeration is designated as a traffic district,and coupling edges are added among nodes connected by urban public transport,walking or other transfer modes to build coupling subnets.Subsequently,the highway and railway subnets are combined into the integrated network by coupling subnets,and the traditional network efficiency indicator is improved to construct a weighted impedance efficiency indicator to evaluate the impedance accessibility of nodes and networks.Finally,taking Chengdu-Chongqing urban agglomeration as a case study,the result shows that(1)the coupling of multiple nodes makes the impedance accessibility of nodes better,therefore,urban transport transfer is an important factor in the study of integrated passenger transport network for urban agglomeration;(2)compared with the highway subnet and the railway subnet,the impedance accessibility of the integrated network is improved by 83.4%and 28.5%respectively,indicating that the coupling of highway and railway passenger subnets improves the impedance accessibility of urban agglomeration passenger transport network;(3)it is an important way to reduce the travel cost and time for passengers to promote the coupling and coordination among stations or among multiple transportation modes,and then build a more convenient integrated passenger transport network in urban agglomeration.
ITStraffic accessibilitycomplex networkurban agglomerationmultimodal transport networktravel impedance
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