Service reliability impacts of computer-aided dispatching and automatic vehicle location technology: A Tri-Met case study

This paper presents findings on initial changes in service reliability foll owing Tri-Met's deployment of a new bus dispatching system using automatic vehicle location and automatic passenger counter technology. Changes in on- time performance, headway variation, run time variation, and run times were determined with respect to predeployment levels. Changes in headway variat ion and run times were also used to estimate the initial benefits of the ne w system with respect to operating costs, passenger waiting, and: passenger travel time.