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You are going through a tunnel. What systems are provided to warn of any incidents, collisions or congestion?

Incidents, Accidents and Emergencies
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Variable message signs
Rumble strips
Double white centre lines
Chevron 'distance markers'
← A tanker is involved in a collision. Which sign shows that it is carrying dangerous goods? You are following other vehicles in fog. You have your lights on. What else can you do to reduce the chances of being in a collision? →

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