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— The E39 Rotsethorn tunnel is located in Volda kommune.
— The Rotsethorn tunnel has a length of 4 030 m and an 270 m arm to Grevsneset.
— The Rotsethorn tunnel has an Annual Average Daily Traffic Volume (AADT) of 2 400.
In the Rotsethorn tunnel, most of the electrical installations including access roads and technical buildings shall be upgraded. 2 New niches shall be blasted in the tunnel, where technical buildings shall be constructed. Some water protection shall also be installed. In addition, the safety system shall be updated. A new, complete IP based video monitoring system based on dome cameras shall be established. New railings and new height barriers shall be mounted at the tunnel openings. Concrete railing shall also be cast on the stretches where they are lacking in the tunnel. Transformers shall be mounted in the 2 new technical buildings in the tunnel and in the 2 buildings on the outside of the tunnel, with transferring of high voltage to these in collaboration with Mørenett AS.
The project will be carried out on the basis of drawings.