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Correct!

While driving through a tunnel, your vehicle catches fire. What's the first thing you should do if the vehicle can't be driven out of the tunnel?

Wait for the police; tunnels are regularly patrolled
Stay with your vehicle; you'll be seen by the CCTV cameras
Stop at the side of the road and switch off the engine
Correct answer
Don't put out the fire; wait for the emergency services

DVSA theory test explanation

If your vehicle catches fire in a tunnel and it can't be driven, stop on the side of the road, as far away from passing traffic as possible. Turn off the engine and warn other traffic by switching on your hazard warning lights.

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