Green Line (San Diego Trolley)
The Green Line is a 19.8-mile (31.9 km) light rail line in the San Diego Trolley system, operated by San Diego Trolley, Inc. an operating division of the San Diego Metropolitan Transit System (MTS). The route serves downtown San Diego, Mission Valley, and the cities of La Mesa and El Cajon. The Green Line has the second highest ridership of the San Diego Trolley's three core lines, transporting 13,673,926 riders during FY 2014 - according to MTS.
The line is one of five lines in the trolley system, the others being the Blue, Orange, Copper, and Silver ("heritage weekend" service only) lines.