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The IRT Broadway – Seventh Avenue Line (also known as the Seventh Avenue Line or the West Side Line) is a New York City Subway line. It is one of several lines that serves the A Division (IRT), stretching from South Ferry in Lower Manhattan north to Van Cortlandt Park – 242nd Street in Riverdale, Bronx.〔MTA Capital Construction - South Ferry Terminal Project, (Environmental Assessment and Section 4(f) Evaluation ), 〕〔Metropolitan Transportation Authority, 〕 The Brooklyn Branch,〔MTA Capital Construction, 〕 from the main line at Chambers Street southeast through the Clark Street Tunnel to Borough Hall in Downtown Brooklyn, is also part of the Broadway – Seventh Avenue Line.〔MTA Capital Construction, Second Avenue Subway, (Supplemental Draft Environmental Impact Statement ), 〕 ==Description== The south end of the Brooklyn Branch is unclear. In a 1981 list of "most deteriorated subway stations", the MTA listed Borough Hall and Clark Street stations as part of the IRT New Lots Line.〔New York Times, Agency Lists Its 69 Most Deteriorated Subway Stations, June 11, 1981, section B, page 5〕 However, as of 2007, emergency exit signs label Borough Hall as an IRT Broadway – Seventh Avenue Line station, and the two parts of Borough Hall are signed as being along the Broadway – Seventh Avenue and IRT Eastern Parkway Lines. The chaining designations "K" (Clark Street Tunnel) and "M" (Joralemon Street Tunnel) join and become "E" (Eastern Parkway Line) at Borough Hall. The line is also known as the IRT West Side Line, since it runs along the west side of Manhattan; the part north of 42nd Street was built as part of the first subway in New York. The line serves places such as Lincoln Center, Columbia University, and the City College of New York. Train services that use the IRT Broadway – Seventh Avenue Line are colored on subway signage and literature. The line is served by the trains, which operate together over much of the line. In the past, the 1 train operated as a skip-stop service in tandem with the , which was discontinued after May 27, 2005; from 1994 onward, this skip-stop separation existed only in Upper Manhattan during rush hours. An unused third track along much of the line north of 96th Street has been used in the past for peak direction express service, at least between 96th Street and 137th Street.〔New York Times, (New Subway Expresses ), November 18, 1906, page 3〕 Currently, this center track is used only during construction reroutes. It is the only line to have elevated stations in 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「IRT Broadway – Seventh Avenue Line」の詳細全文を読む スポンサード リンク
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