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Hallandsås Tunnel
The Hallandsås Tunnel ((スウェーデン語:Hallandsåstunneln)), also known as the Hallandsås Ridge Tunnel or Scanlink, is a railway tunnel under construction in Sweden. It will connect the northern and the southern sides of the Hallandsås geological formation (a horst). The planned length is ( in one bore, in the other). It will be utilised by the West Coast Line, on the section between Ängelholm and Halmstad in southwestern Sweden. When finished, it will improve the connection between the cities of Gothenburg, Sweden, and Copenhagen, Denmark. In the longer term it would be a key component in the proposed Oslo to Hamburg high speed rail link via Gothenburg, Malmö and Copenhagen.
The project has been troubled by construction difficulties caused by groundwater ingress, and a scandal when dangerous sealant materials were used causing workers to become ill and killing local fish and cattle. These caused the project to be halted from late 1997 to 2005, and resulted in large cost over-runs. The project is scheduled to be finished in December 2015, over 23 years after start of construction.
== Background ==
The tunnel is part of a larger project to upgrade the whole West Coast Line to double track. In the context of this project, the single-track stretch over the Hallandsås ridge is both too curvy and steep to allow for easy double-track conversion and still allow for high-speed passenger trains and heavy freight trains. Additionally, this stretch contains 13 level crossings, the single-track Båstad station, and a passing loop at Grevie at which trains must meet (and accumulate significant delays if one or both trains are late). In order to avoid this bottleneck, passenger train service between Gothenburg/Oslo and Malmö, as well as most freight trains, must take a long detour along the Halmstad–Hässleholm railway (which is also too steep for efficient freight traffic) and on the congested Hässleholm–Malmö railway.
Completion of the Hallandsås Tunnel will allow a time saving of 10 to 15 minutes for passenger trains. More significantly, however, the capacity across the ridge will increase from 4 to 24 trains per hour. The tunnel project was conceived by the European Round Table of Industrialists and the newly formed Swedish Rail Administration (''Banverket'', now part of the Swedish Transport Administration or ''Trafikverket'') in the 1980s.
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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