Driving in tunnels can be dangerous as it’s an enclosed space. Look for speed limit signs and drive to the conditions. Tunnels usually have variable speed limits (e.g. lower limits in congested/heavy traffic).
Also, look for and obey safety/traffic info from variable message and lane control signs.Keep a longer following distance when driving in tunnels
In case of a breakdown, turn on the hazard lights and listen for any instructions on the radio. Try to drive out of the tunnel even if your vehicle is damaged.
Stay in your vehicle unless you must get out. If you must leave the vehicle, be alert for traffic and move to the walkway or a safe place. Don’t stand behind your vehicle.