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The Silicon Valley BART extension is a three-phase expansion of the Bay Area Rapid Transit (BART) from its current terminus in Fremont to Santa Clara County. Extensions to the Warm Springs District and Berryessa District are under construction, while the proposed Downtown San Jose and proposed Santa Clara extensions are both still in need of funding. The Warm Springs extension is targeted to open between April and December of 2016. Construction of the Berryessa extension started in 2012, and it is projected to open for public service in 2018. ==History== Santa Clara County was originally going to have been part of the BART system, but local leaders voted it down. Minor service at Palo Alto right over the border from San Mateo County was also planned originally. However, San Mateo County also opted out, leaving Fremont the closest end of line. In the late 1990s, planners and community leaders began to plan out a BART extension to San Jose to ameliorate traffic and connect Silicon Valley to the rest of the Bay Area and close the gap in rail service around the bay. In 2000, Santa Clara County voters approved a 30-year-long half cent sales tax increase to fund BART.〔 The tax did not come into effect until 2006. It became clear that federal funding would not be approved until the county's transit body, the Valley Transportation Authority (VTA), could prove that it could operate the BART extension with its own funds in a way that would not be detrimental to its existing transit and transportation infrastructure, following the project's multiple failures to gain congressional approval for this reason.〔 In 2008, to mitigate that fact, the voters were again asked to raise sales tax this time by ⅛ of 1% to come into effect if federal funding of the project were approved.〔〔 In 2009, it was disclosed that due to worsening economic factors, over its 30-year lifespan, the 2000 sales tax would only bring in $7 billion and not the anticipated $11 billion, so the number of planned stations was reduced.〔〔 The project was cut into phases with service to northern San Jose at Berryessa originally planned for 2018 and proposed to downtown San Jose by 2025 which may or may not include Santa Clara.〔〔 In 2009, the first phase of expansion in Warm Springs began with the awarding of a $140 million contract to tunnel underneath Fremont's Central Park. The additional $300 million to complete the expansion was contracted out in 2011. Construction began in 2009.〔(【引用サイトリンク】On schedule and under budget )〕 In 2011, VTA awarded a $770 million contract to begin building the first phase of extension to the joint venture Skanska-Shimmick-Herzog. The winning bid was awarded $77 million under initial cost estimates, and the contract is expected to open for revenue service in late 2016, 18 months earlier than previously expected. On January 10, 2012, the federal government recommended approval of a $900 million grant to fund the Berryessa Extension. The grant was officially awarded by the Federal Transit Administration in March 2012, and the project officially began construction in April 2012. The Berryessa extension is scheduled to open for public service by 2018.〔 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「Silicon Valley BART extension」の詳細全文を読む スポンサード リンク
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