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The Sunda Strait Bridge ((インドネシア語:Jembatan Selat Sunda), ''JSS'', ''Jembatan Selsun'', sometimes referred to in English-language reports as the ''SSB'') is a planned road and railway megaproject between the two large Indonesian islands of Sumatra and Java. The suggestion for a bridge was reportedly first put forward in 1960 by Professor Sedyatmo from Institut Teknologi Bandung as a part of broader plans, known as ''Tri Nusa Bimasakti'', to link the three islands of Sumatra, Java and Bali.〔Dimas Novita S. and Zufrizal, '(Sunda Strait Bridge: Towards ground breaking in 2014' ), ''Indonesian Infrastructure Initiative'' website, 19 April 2013.〕 In October 2007, after years of discussion and planning, the Indonesian government gave the initial go-ahead for a project which includes several of the world’s longest suspension bridges, across the Sunda Strait. However, seven years later in November 2014, the incoming Joko Widodo government announced that plans to build the bridge would be shelved.〔Satria Sambijantoro, '(No more Sunda Strait Bridge plan' ), ''The Jakarta Post'', 3 November 2014. See also '(New Government Will Not Prioritize Sunda Strait Bridge Project' ), '' Global Indonesian Voices'', 2 November 2014.〕 ==Outline of the project== Construction of the bridge would be an ambitious project, being much more expensive than any other single infrastructure investment yet carried out in Indonesia. If the project goes ahead as planned, it would join the list of the world's most expensive transport infrastructure. The project, with an initial estimated minimum cost of at least US$10 billion but probably considerably more, is for a series of bridges carrying a six lane highway and double track railway traversing the three islands of Prajurit, Sangiang, and Ular in the strait. The upper structure with a span of 3,300 meters would be like the Messina Strait Bridge in Italy, while the lower structure with a span of 1,991 meters would be similar to the Akashi Kaikyō Bridge in Japan.〔(【引用サイトリンク】title=Construction of Sunda Strait Bridge Takes 10 Years, Kompas )〕 Officials in the consortium that plan to build the bridge originally hoped that construction would begin in 2012 but even the plan to prepare a feasibility study was delayed beyond 2012. It is currently (early 2013) hoped that a feasibility study will be prepared in 2013. There were originally hopes are that that the first travellers might cross the bridge as early as 2020 although the likely completion date is tending to drift because of delays in discussions about plans for the project.〔 There are different views as to the most appropriate design for the details of the bridge, and even as to whether the construction of a bridge is the best way of easing the current serious transport bottlenecks for movement between Java and Sumatra.〔Putri Prameshwari, '(Railway on Sunda Bridge to Require Separate Study on Earthquake Impact' ), ''The Jakarta Globe'', 21 November 2009. Alexander A. Bolonkin and Richard B. Cathcart (2007), '(The Java-Sumatra Aerial Mega-Tramway' ).〕 Alternatives which some observers favour are the construction of a tunnel or, more simply, improvements to the existing intensively used ferry services.〔Putri Prameshwari, ''ibid''. See also Oyos Saroso H.N., '(Exodus route hellish from Jakarta to S. Sumatra' ), ''The Jakarta Post'', 27 August 2011.〕 One of the various possible designs that has been mentioned involves a project of around 27 km in length with the following sections alternating across land and water:〔Details are from Hans David Tampubolon, '(Sunda Strait Bridge left in lurch by Cabinet split' ),''The Jakarta Post'', 25 July 2012.〕 Possible sections of Sunda Strait Bridge (illustrative example) One of the difficult technical challenges to be considered is the fact that the strait lies in one of the world's most dangerous earthquake zones. Sumatra is frequently rocked by significant tremors; more than 170,000 people in Aceh in northern Sumatra were killed when a 9.0-magnitude quake in December 2004 triggered a tsunami. Many active volcanoes lie in the area, including Krakatoa only 40 km away. The best known eruption of Krakatau in 1883 culminated in a series of massive explosions that killed tens of thousands of people. The bridge would significantly cut the travel time across the Sunda Strait which takes several hours by ferry. Some 20 million people crossed the strait in 2006 and the figure is forecast to double by 2020. The bridge would connect Java, with a population (2011) of around 140 million, with Sumatra (population around 52 million). A bridge might encourage some Jabodetabek commuters to move to Lampung province in southern Sumatra from Banten in West Java. The capital Jakarta lies some 100 km (65 mi) to the east of the strait, on Java. Java is the most populous island in the world, and Sumatra is fifth. A BBC news report in June 2010 put the estimated cost at $20bn and suggested that construction may start as early as 2011. 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「Sunda Strait Bridge」の詳細全文を読む スポンサード リンク
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