The existing Støylsnes tunnel, located in Jølster kommune [municipality] in Sogn og Fjordane, will be extended with a new 6,5 km tunnel for landslide protection of National Road 5 along the entire Kjøsnes fjord. The new tunnel will connect to the Støylsnes tunnel inside the mountain, and the total tunnel length will be approx. 8,5 km. The assignment includes engineering design, construction, control and documentation of the project National Road 5 tunnel Kjøsnes fjord.

The tunnel must be completely safety approved before hand-over to the builder. The project consists primarily of about 6,5 km of new tunnel with profile T9.5, rehabilitation of The Støylsnes tunnel with profile T8.5, and 0,4 km new main road classification H2 with a width of 8,5 m. In addition, approximately 0,8 km of local roads and foot/cycle paths will be constructed. Approximately 3 km of new tunnel has been blasted in a previous contract, where the masses are used in road construction for the E39 Bjørset — Skei project. The existing Støylsnes tunnel must be rehabilitated with new technical buildings both in the mountain and in the open-air, new electronic installations, and some building and technical installations. The Støylsnes tunnel must be open for normal traffic during the construction period.