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Storfjord Bridge
The Storfjord Bridge ((ノルウェー語:Storfjordbrua)) is a proposed suspension bridge that would span Storfjorden in Sunnmøre, Norway. If built, it would be long and have a main span of . This would make it the longest spanned bridge in the world, easily surpassing the Akashi-Kaikyō Bridge, which has a main span of . The plans have been developed by Aas-Jakobsen for a Storfjordsambandet, a company which aims to toll finance the bridge. According to Rolf M. Larssen of Aas-Jakobsen, there is a larger challenge securing sufficient funding than technically building the bridge. It is estimated to cost 4.3 billion Norwegian krone.
In a report made by Aas-Jakobsen, two crossings were discussed, one slightly in-fjord from the ferry and one which would cross to Ørskog. The bridge would have a single main cable and a split bridge beam. The cable would run down the centre of the bridge, with the lanes on each side of an open area with cross-sections. While this method is more expensive, it allows for a more aerodynamic bridge. The bridge would have two pylons, with the road lanes crossing on the outside of the pylons. Each pylon would be tall. The pylons would be round with a diameter of between . The northern pylon would be anchored in bedrock, while the southern pylon would be anchored in a caisson in bedrock, located below mean sea level. The distance between the middle of the lanes would be at the pylons, and at the middle of the bridge. The main cable would be above the sea at the pylons and above the sea at the middle. The bridge allows a clearance below of , wide.
The crossing would establish a fixed link for Sykkylven and Stranda towards Ålesund. The service is currently operated by the Ørsneset–Magerholm Ferry on National Road 60, which had an average daily traffic of 1967 cars and 175 in 2009, making it the fifth-most trafficked ferry service in Norway. Former proposals for the crossing has included a submerged floating tunnel and a pontoon bridge, although both have since been discarded. The design is part of a project initiated by the Norwegian Public Roads Administration to develop extreme technology which would make it possible to make E39, the Coastal Highway, ferry free.〔
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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