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Incorrect!

What should you do before entering a tunnel?

Put on your sunglasses
You selected this answer
Check your tyre pressures
Change to a lower gear
Tune your radio to a local channel
Correct answer

DVSA theory test explanation

On the approach to many tunnels, a board will indicate a local channel or radio frequency that you should tune into. This should give a warning of any incident or congestion in the tunnel ahead. Severe loss of life has occurred in tunnel fires. Getting advance warning of any problems ahead will help you to take appropriate action in good time.

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