A transit trip guidance system based on detailed data representation

This paper deals with the detailed representation of transit lines and stops in GIS, and explores the application of this representat ion to transit transfer guidance. The need for detailed representation of public transport features is illustrated by cases existing in large cities. Based on o bject-oriented analysis and dynamic segmentation, the traditional line and stop models are extended to allow representations of directional routes and individu al locations of route stops. The representations make use of dependent or indepe ndent methods with reference to road networks. In real situation, transit travel lers need clear trip guidance, in which transit transfer plays an important part . The process and problems of generating transfer scenario from the detailed rep resentation of transit routes and stops are described and discussed. It is argue d that the detailed data representation has to be incorporated into a more compr ehensive data framework for an advanced transit traveller information system.