The purpose of this paper is to present a bus information system (BIS) for Champaign-Urbana Mass Transit District (CUMTD), which is an interactive and easy-to-use WWW-based application. The BIS will provide users with the shortest travel path and transfer information once the users enter an origin and a destination. Information pertaining to the most efficient routes, the given origin and destination, the nearest bus stop, transfer location and schedule, the arrival time of a bus at the given origin, and the estimated total travel time will be displayed both graphically and in text format within a second upon request. To provide this service, we used Dynamap/2000 by GDT (data as of November of 1997) as the basemap, which has been updated with current street and address data as of October 1998. The BIS has been developed using MapObjects, NetEngine, and MapObjects Internet Map Server, provided by Esri. Street networks and bus routes were constructed using ArcView GIS and ARC/INFO.