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121st Street is a skip-stop station on the elevated BMT Jamaica Line of the New York City Subway. Located at the intersection of 121st Street and Jamaica Avenue in Queens, it is served by the Z train during rush hours in the peak direction, and by the J train at all other times. == Station layout== This elevated station was opened on July 3, 1918〔 * * * 〕 by the Brooklyn Union Elevated Railroad, an affiliate of the Brooklyn Rapid Transit Company. The station has two tracks and two side platforms, with space for a center express track that was never added. This station has beige windscreens, green canopies, and two exits. The full-time exit is at the west (railroad south) end of the station. One staircase from each platform leads to the mezzanine beneath the tracks. Outside of fare control, a pair of staircases lead down to either side of Jamaica Avenue on the west side of 121st Street. There is an additional un-staffed exit at the east (railroad north) end of the station leading to the west side of 123rd Street. This exit is split in half due to the closed-off station house beneath the tracks. A single staircase from each platforms leads to a landing that contains a full-height turnstile before reaching the street stairs. The Manhattan-bound side is HEET turnstile access while the Jamaica-bound side is exit-only. This is the easternmost station on the Jamaica Line. East of here, trains go underground to the BMT Archer Avenue Line. During construction of the Archer Avenue Line, this station was the terminal for the Jamaica Avenue El from April 15, 1985, to December 10, 1988. The remainder of the el was replaced by Q49 bus service until the Archer Avenue Line opened up. Construction on the ramps to Archer Avenue was completed in November 1987, but since the tunnels were not ready for service until 1988, a double crossover east (railroad north) of the station was installed while the ramps were used for storage. After reaching 121st Street, trains used the crossover to switch from the Jamaica-bound track to the Manhattan-bound one, where they would relay to the platform and begin service to Manhattan. The elevated structure between this station in the vicinity of 127th Street, and the now-demolished Metropolitan Avenue station was torn down to make way for the connecting ramps. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「121st Street (BMT Jamaica Line)」の詳細全文を読む スポンサード リンク
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