When approaching a tunnel
Many tunnels, particularly the longer ones in Europe, are equipped with radio transmitters so that drivers can be warned of any incidents, congestion or roadworks. If this applies to the tunnel you’re approaching, switch on your radio and tune in to the indicated frequency.
When entering a tunnel, your visibility will be suddenly reduced. Be prepared for this change in conditions and make sure that you can stop within the distance you can see to be clear. Increase the distance between you and the car in front if necessary.
If the tunnel is congested
For action to take in the event of a breakdown or incident, see section 16.