How long is the tunnel from Italy to Switzerland?

Simplon Tunnel, railway tunnel from Iselle, Italy, to Brig, Switzerland, one of the longest railway tunnels in the world and one of history's great engineering feats. Running about 20 km (12.5 miles) long, it was the largest of the great Alpine tunnels when it opened to traffic in 1906.



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The Laerdal Tunnel in western Norway is the longest road tunnel in the world. It takes about 20 minutes to pass through the tunnel. Brightly colored lights placed every six kilometers help drivers stay alert.

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