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Incorrect!

You're going through a long tunnel. What will warn you of congestion or an incident ahead?

Hazard warning lines
Other drivers flashing their lights
You selected this answer
Variable message signs
Correct answer
Areas with hatch markings

DVSA theory test explanation

Follow the instructions given by the signs or by tunnel officials. In congested tunnels, a minor incident can soon turn into a major one, with serious or even fatal results.

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