The San Diego Trolley (known colloquially as "The Trolley") is a light rail system operating in the metropolitan area of San Diego. The Trolley's operator, San Diego Trolley, Inc. (reporting mark SDTI), is a subsidiary of the San Diego Metropolitan Transit System (MTS). The trolley operates as a critical component of the MTS, with connections to and integrated travel tickets with the local bus systems. There is one downtown station which is a universal transfer point on the system, and 13 other stations that provide transfers to a second line (and two of these also provide connections to heavy rail systems).
The Trolley system serves 62 stations, over about 67.9 miles (109.3 km) of route, using three primary lines (the Blue, Orange, and Green lines) that operate daily, and the "downtown loop" heritage line (the Silver Line) that uses historic streetcars on select holidays. (Full article...)