Speed in tunnels

Tunnels have their own challenges that differ from open roads. Limited visibility, artificial lighting and a lack of escape routes make it extra important to maintain the right speed.

Speed limits in tunnels

The speed limit in a tunnel is always signposted at the entrance. Check Speed Zone Signs and Zones for more on how zone boundaries work.

Challenges in tunnels

• Light transition. When driving from daylight into a dark tunnel, your eyes need time to adjust. Slow down when entering the vehicle.
• Limited width. Tunnel walls provide less room for error than open roads.
• Distance judgment. Artificial lighting can make it difficult to assess the distance to the car in front.
• Bad air. Exhaust fumes accumulate in long tunnels, and you should avoid standing still for a long time.

Safety equipment in tunnels

Norwegian tunnels have emergency stations, breakdown pockets and emergency exits at regular intervals. Know the location before entering a long tunnel. Read more about tunneling and light use for detailed rules on lighting.

How to drive safely in a tunnel

• Turn on low beams before entering so that you are visible to others.
• Keep good distance according to the three-second rule , preferably more in long tunnels.
• Do not stop in the tunnel unless there is an emergency. See emergency stop and breakdown for what to do if you have to stop.
• Be aware of variable signs and electronic signage which may change the speed limit along the way.
• Listen to traffic lights and signals at the tunnel opening that may close the tunnel.

Further reading

• Tunneling and light use
• Speed on European and national roads
• Stopping distance calculation
• Emergency stop and breakdown