What should you do as you approach a long road tunnel?

A: Put on your sunglasses and use the sun visor

B: Turn your headlights on to main beam

C: Change down to a lower gear

D: Make sure your radio is tuned to the frequency shown

On the approach to tunnels, a sign will usually show a local radio channel. This should give a warning of any incidents or congestion in the tunnel ahead. Many radios can be set to automatically pick up traffic announcements and local frequencies. If you

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