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The Eurasia Tunnel ((トルコ語:Avrasya Tüp Tüneli)) is a road tunnel under construction in Istanbul, Turkey, crossing the Bosphorus strait undersea. The project's completion is expected by October 2016.〔 The double-deck tunnel will connect Kazlıçeşme on the European and Göztepe on the Asian part of Istanbul on a route.〔 It will cross the Bosphorus beneath the seabed, with the aim to alleviate Istanbul’s traffic pressure.〔〔〔 It is at about south of the undersea railway tunnel Marmaray, which was opened on 29 October 2013.〔 With this new route, the journey time between Kazlicesme and Göztepe will be shortened from 100 minutes to 15 minutes.〔〔〔〔 ==Background== The conceptual background of Eurasia Tunnel reaches back to the findings of the Transportation Master Plan undertaken by Istanbul University on behalf of Istanbul Metropolitan Municipality in 1997. Based on this plan, a pre-feasibility study had been conducted in 2003 for a new Bosphorus crossing. According to the results of this study, a road tunnel was recommended as the solution that offers the highest feasibility.〔〔 The Ministry of Transportation, Maritime and Communication of Turkey has commissioned a feasibility study to Nippon Koei Co. Ltd. in 2005 for an assessment of route alternatives for a new tunnel crossing. Based on environmental and social criteria and cost and risk factors, the study has supported the proposed route as the preferred option. The two current bridges have also been taken into consideration in selecting the tunnel’s location, which enables a balanced distribution in Bosphors crossings. Among other selection criteria, lowest investment cost due to a shorter tunnel length and sufficient space for construction sites and operational buildings (toll plaza, administrative units) have also stood out. High level assessments based on corridor alternatives that are comprehensively defined in the feasibility study also support the selection of the proposed route in terms of environmental and social costs and risk factors. 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「Eurasia Tunnel」の詳細全文を読む スポンサード リンク
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