URBAN PUBLIC TRANSPORTATION NETWORK AND ITS MODEL

Though Urban Public Transportation Network (UPTN) has a certain similarity to the common urban road network, it cannot duplicate the same topological model of the common urban road network owing to its unique characteristics. This paper presents the weighted directional multi-graph model of the UPTN as well as its modeling procedures and storage structure. Moreover, it proposes the concepts if walking transfer area and transfer cost function. The model, which fully considers the relationship of bus stops, forms the basis of network analyses of UPTN and realization of a more practical and intelligent public transportation information system.