County road 48 Fossenbratte tunnel - upgrading of tunnels

length of 665 metres and one annual daily traffic (ÅDT) of 2831 vehicles (2023), of which 15% are heavy transport. It is classified in tunnel class B, signposted height 4.2 metres. The speed limit in the tunnel is 80 km/h. It has approx. 6% falls in the direction of Bjørkheim. The tunnel was opened

to traffic in 1976. The upgrading mainly includes replacing and modernising electrical and technical control installations, the establishment of a new technical building in the open air, a new drainage and surface water system, as well as