Personal Rapid Transit

A system of railways, usually electric, that is used for local transit in a metropolitan area. A personal rapid transit line may run underground (subway), above street level (elevated personal rapid transit line), or at street level. Personal rapid transit is distinguished from other forms of mass transit by its operation on exclusive right-of-way, with no access for other vehicles or for pedestrians.  For more on personal rapid transit, visit Wikipedia's personal rapid transit page.