Downtown Crossing station (often known as DTX) is an underground Massachusetts Bay Transportation Authority (MBTA) rapid transit station located in the Downtown Crossing retail district in the downtown core of Boston, Massachusetts. It is served by the Orange Line and Red Line, and is one of four "hub stations" on the MBTA subway system. Downtown Crossing is also a major bus transfer location serving 13 MBTA bus routes, including one Silver Line route. It is the second busiest subway station in the MBTA network (behind only ), with an average of 24,074 entries per weekday in FY2019. The Washington Street Tunnel carrying the Main Line (later the Orange Line) opened in 1908, with platforms called Summer and Winter. The Dorchester Tunnel carrying the Cambridge–Dorchester Line (now the Red Line) opened in 1915, with its station called Washington. The MBTA renamed the whole station complex as Washington in 1967, then Downtown Crossing in 1987. Major renovations took place in the 1970s and 1980s. Silver Line service began in 2002. Station layout Downtown Crossing has two underground platform levels, each with two side platforms. The upper level serves the Orange Line and stretches from Temple Place to Franklin Street under Washington Street. A concourse from Washington Street to Chauncey Street under Summer Street houses the Charliecard Store and includes entrances to several retail stores. The lower level platforms, under the concourse, serve Red Line trains. The Winter Street Concourse, which connects to the southbound Orange Line platform, allows access to the Green Line at without leaving the common paid area. Accessibility Like all Orange Line and Red Line stations, Downtown Crossing is accessible. Surface elevators are located at the Winter Street, Franklin Street, and Hawley Street entrances. An additional elevator – open business hours only – leads to the Roche Brothers store which connects to the Summer Street concourse. Because Downtown Crossing is an older station built at two different times in a dense urban area, transfers between the two lines are convoluted. There is no elevator between either of the Red Line platforms and the southbound Orange Line platform; passengers making such transfers must use the Winter Street Concourse and the Red Line elevators at Park Street. The northbound Red Line platform has elevators at both ends of the Summer Street concourse for connections to the northbound Orange Line and to the street. The southbound Red Line platform only has an