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The Astoria Line is a rapid transit line of the BMT Division of the New York City Subway, serving the Queens neighborhood of Astoria. It runs south from Ditmars Boulevard in Astoria to 39th Avenue in Long Island City above 31st Street. It then turns west and serves Queensboro Plaza over Queens Plaza. The entire line is served by the N train at all times, joined by the Q on weekdays. It was built as part of the Dual Contracts and jointly operated by the IRT and BMT using IRT-sized cars until 1949, when the platforms were shaved to accept the wider BMT cars and joint service was discontinued. == Description and service == All services make all stops on the BMT Astoria Line. The north end of the Astoria Line is a two-track terminal at Ditmars Boulevard, with one island platform. South of the station, the center express track, currently not used in revenue service, begins (with crossovers to allow terminating trains to reach the correct track). The next station, Astoria Boulevard, is the only express station on the three-track section. The next four stations are local ones with two side platforms. South of 39th Avenue, the express track merges with the two outer tracks. The line then curves west and enters Queensboro Plaza, a dual-level station with northbound trains on the upper level, southbound trains on the lower level, and cross-platform transfers to the IRT Flushing Line. Crossover tracks exist between the upper level tracks just north of the station, one of a few connections between the BMT / IND and IRT. After Queensboro Plaza, the line ramps underground, and merges with the 60th Street Tunnel Connection to become the BMT Broadway Line via the 60th Street Tunnel to Manhattan. 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「BMT Astoria Line」の詳細全文を読む スポンサード リンク
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