Functional And Interface Requirements For Advanced Public Transportation Systems

This report studies the current development of functional requirements and interface standards for the public transit industry. It begins with a critical review of recent architecture efforts and their functional and interface requirements. It then describes the results of a survey of public transit vendors that was conducted to learn about the technical characteristics of products and vendor attitudes toward interface standards. Four case studies of recent technology applications in the San Francisco Bay Area are then described. These case studies reflect that factors such as market timing, vendor-agency communication, and experience are key factors that affect the development of interface requirements and standards for the transit industry.