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The Graitery Tunnel is about 2.5 km long and lies on the route of the A16 autobahn through the Jura Mountains. It was originally planned to excavate the tunnel from both portals, but geological problems at the south portal have delayed the drive from that end for years. A new logistic plan was required for inner lining and tunnelling. A mobile bridge construction over 60 m long was used in the tunnel,...
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