This paper considers the mass transit technology available for medium sized cities. The term mass transit as used here refers to any urban transport system carrying large volumes of people, usually along well-defined corridors connecting suburbs to the city centre. This paper focuses on those mass
transit systems that commonly use a reserved right-of-way for some, or all, of their route length; this includes metro railways, busway transit and Light Rail Transit.
Conference ‘20x20’ Vision, University of Ulster, April 1995. TRL - Crowthorne, UK. pp. 11