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Projects

gjoevik
The worlds largest rock cavern for public use
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eiksund
Eiksund Tunnel, the deepest subsea road tunnel in the world
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laerdal
Laerdal tunnel is the worlds longest road tunnel
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Our Network

NTN -encourages and coordinates commercial export of Norwegian Tunnelling Technology to the international markets.

NTN –communicates knowledge and opportunities from the international tunnelling industry back to the Norwegian industry