What should you do when you're driving through a tunnel in heavy traffic?
DVSA explanation
In congested tunnels, you should always obey the instructions given by variable message signs and tunnel officials. Listen out for radio announcements and observe the road signs and signals. Keep your distance from the vehicle in front.
Want more free practice?
Ready to test yourself on the latest DVSA revision questions?
More free ways to get ready for your DVSA PCV theory test.