Addison Road is an island platformed Washington Metro station in Walker Mill, Maryland, United States. The station was opened on November 22, 1980, and is operated by the Washington Metropolitan Area Transit Authority . Providing service for the Blue and Silver Lines, the station is located near the residential area of Seat Pleasant on Central Avenue near Addison Road. In December 2012, Addison Road was one of five stations added to the route of the Silver Line, which was originally supposed to end at the Stadium-Armory station, but was extended into Prince George's County, Maryland to the Largo Town Center station due to safety concerns about a pocket track just past Stadium-Armory. Silver Line service at Addison Road began on July 26, 2014.The station opened on November 22, 1980, and coincided with the completion of 3.52mi of rail east of the Stadium–Armory station and the opening of the Benning Road and Capitol Heights stations. Originally named "Addison Road"; "Seat Pleasant" was added in 2000, and moved to a new subtitle location in 2011. It was the eastern terminus of the Blue Line from its opening until December 18, 2004, when the extension to the Largo Town Center station opened to the east.
