What will warn you of congestion in a tunnel?
What will warn you of congestion in a tunnel? Switch on Hazard warning lights when approaching congestion in accordance with the Highway Code. Listen to messages broadcast over the public address system and follow the instructions given by the tunnel operator at all times.
Should a driver do before entering a tunnel?
Make sure you get in lane early. Make sure your lights are on. It's really important to see and be seen – that sunny day won't make any difference when you're in a tunnel. Keep an eye out for speed limits, as they might change as you approach a tunnel so stay alert for signs near or on the tunnel entrance.
Do you turn your headlights on in a tunnel during the day?
Always keep your headlights on in a tunnel. You must always keep your headlights on in a tunnel, as the law says that headlights must always be used when a vehicle is being driven in the dark or dim light, or if visibility has deteriorated due to the weather or other reasons.