Currently transit quality information such as timetable adherence, bus arrival times and route performance has usually been disseminated through static environments on web-pages, paper documents or other different media. This paper describes a dynamic Geographic Information Systembased Web application which displays the same information through a dynamic web application. Using data collected from an Automatic Vehicle Location System (AVL), a map-based interface has been created to allow travellers and operators to see routes, stops and buses in motion. The collected information is archived for off-line analysis. The system allows users to query and display day-to-day management of operations as well as to generate static performance reports to provide a complete view of the transit system reliability.