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Upgrade of electrical and control engineering installations, site and
construction engineering as well as traffic flow in the Jernfjell and Skrikeberg tunnel.
The Jernfjell tunnel is 2,391 metres long and was opened in 1989.
Tunnel profile:T8
Free height 4.5 metres
Width: 2 x 2.9 m (driving lane width)
Max gradient: 8.0 %
Speed limit 80 km/h
ADT (Average annual daily traffic): 2,000
Portion of heavy traffic: 16%
The Skrikeberg tunnel is 1,508 metres long and was opened in 1990.
Tunnel profile:T8
Free height 4.5 metres
Width: 2 x 2.95 m (driving lane width).
Max gradient: 1.0 %.
Speed limit 80 km/h
ADT (Average annual daily traffic): 1,800.
Portion of heavy traffic: 16%