A Model of Bus-Metro Bi-level Weighted Network with Travel Efficiency

A model of Bus- Metro bi -level weighted network is constructed over travel efficiency of public transport, reflecting the characteristics of various traffic carriers and how they connects. The edge weight of network model will be got by computing travelling time costs between two adjacent stations. Taking the public traffic system of Nanjing city as an example, this paper empirically analyses travel efficiency under multi-modal transportation, which shows that bi-levcl spatial traffic model can provide a good choice of navigation path and better reflect travel condition under the real transportation network, compared to that of single traffic mode network. It further reveals the cooperation and independent relationship between Bus system and Metro system, reflecting spatio-temporal characteristics of urban traffic system.