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The Central Subway is an extension of the Muni Metro light rail system under construction in San Francisco, California, from the Caltrain commuter rail depot at 4th and King streets to Chinatown, with stops in South of Market (SoMa) and Union Square. The subway is the second phase of the San Francisco Municipal Transportation Agency's Third Street Light Rail Project. The first phase opened to the public as the T Third Line in 2007. With the addition of the Central Subway, the T Third Line is projected to become the most heavily ridden line in the Muni Metro system by 2030. The subway will serve major employment and population centers in San Francisco that are underserved by rapid transit. SoMa is home to the headquarters of many of San Francisco’s major software and technology companies, and substantial residential growth is projected there. Union Square, located in the city's downtown, is a primary commercial and economic district. Chinatown is the most densely populated neighborhood in the city. The Central Subway will connect these areas to communities in eastern San Francisco, including Mission Bay, Dogpatch, Bayview-Hunters Point and Visitacion Valley. The budget to complete the Central Subway is $1.578 billion. The project is funded primarily through the Federal Transit Administration’s New Starts program. In October 2012, the FTA approved a Full Funding Grant Agreement, the federal commitment of funding through New Starts, for the Central Subway for a total amount of $942.2 million.〔(【引用サイトリンク】title=U.S. Transportation Secretary LaHood Announces $942.2 Million to Extend San Francisco’s Third Street Light Rail System )〕 The Central Subway is also funded by the State of California, the Metropolitan Transportation Commission, the San Francisco County Transportation Authority and the City and County of San Francisco.〔(【引用サイトリンク】title=Central Subway Project Funding/Budget )〕 Ground was broken for the Central Subway on February 9, 2010. , both tunnel boring machines (TBMs) had passed under Market Street and were tunneling under Stockton Street toward Chinatown. Tunnel boring for the Central Subway was completed at Columbus and Powell Street in the North Beach neighborhood of San Francisco on June 16, 2014. This subway extension of the T Third Line is expected to open to the public by 2019. ==Alignment== In February 2008, the San Francisco Municipal Transportation Agency board of directors voted to select the alignment for the subway.〔(【引用サイトリンク】MTA Board Selects Central Subway Alignment )〕 In the approved alignment, trains travel north along 4th Street and Stockton Street, stopping at one above-ground station and three subway stations on their 1.7-mile route. Currently northbound T Third Line trains turn right from 4th Street onto King Street and travel along the Embarcadero to the Market Street Tunnel. When the Central Subway is complete, trains will instead cross King Street and continue north on 4th Street. The first stop will be at an above-ground station at 4th and Brannan streets, the 4th and Brannan Station. Heading north, trains will enter the subway through a portal on 4th Street between Bryant and Harrison streets, under Interstate 80. The route will then continue under 4th Street through South of Market, stopping at an underground station, the Yerba Buena/Moscone Station, at 4th and Clementina streets, near the Moscone Center. At Market Street, the subway will dip below the Market Street Subway. Another underground station serving Market Street and Union Square will be located underneath Stockton Street. This combined Union Square/Market Street Station will have entrances at the Market, Ellis and Stockton intersection and within Union Square Plaza at Stockton and Geary streets. A pedestrian passage will connect the Union Square/Market Street Station to the Muni Metro and BART Powell Street Station. The subway will then continue under Stockton Street to Chinatown Station, a station to be located in Chinatown at Stockton and Washington streets.〔(【引用サイトリンク】title=Central Subway Alignment )〕 The subway tunnels, one for northbound trains and one for southbound trains, will continue north past Chinatown Station, beneath Stockton Street and Columbus Avenue. In the future, the T Third Line may terminate in North Beach or extend to Fisherman's Wharf and the Aquatic Park to connect with F Market & Wharves. 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「Central Subway」の詳細全文を読む スポンサード リンク
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