Design methodology for the development of a computer-based automatic train control system

Westinghouse Transportation Division(WTD) has incorporated microprocessor control into several previous Automatic Train Control (ATC) designs for both mass transit and people mover systems. It has become necessary to reexamine the rationales of previous designs in order to synthesize an optimal design solution for the more stringent quantitative requirements of new-generation systems. A design methodology has been applied which integrates functional, reliability, maintainability, and safety requirements at a stage sufficiently early to allow them to be adequately addressed.