Metro Rail is the rapid transit rail system consisting of six separate lines:
80 service stations in Los Angeles. It connects to the Metro Transitway bus rapid transit system, as well as the Metrolink commuter rail system. The system, which has an average daily weekday passengers 362,904 as of June 2012, owns and operates the Los Angeles County Metropolitan Transportation Authority and began service in 1990. It was significantly increased during this time and some extensions, or in or under consideration.
It is an indirect descendant of the Pacific Electric Red Car and Los Angeles Railway Yellow Car line, which operated from the late 19th century and the 1960s.
In Los Angeles Metro terminology, a line is a named service, defined by a route and set of stations served by trains on that route. (The word does not refer to a physical rail corridor, as it does in New York City Subway nomenclature.) Metro Rail lines are currently named after colors (with the exception of the Expo Line), and these colors are used to distinguish the lines on Metro's maps. However, Metro also uses colors for its Metro Liner services (which are actually bus services operating in transitways). Some future Metro Rail lines (in particular, the Crenshaw Line) have no colors assigned to them yet.