Before entering fog check your mirrors then slow down. If the word ‘Fog’ is shown on a road signal but the road is clear, be prepared for a bank of fog or drifting patchy fog ahead. Even if it seems to be clearing, you can suddenly find yourself in thick fog.
When driving in fog you should:
- Use headlights when visibility is seriously reduced – generally when you cannot see for more than 100 metres (328 feet).
- Keep a safe distance behind the vehicle in front.
- Be able to pull up well within the distance you can see clearly, particularly on motorways and dual carriageways, as vehicles are travelling faster.
- Use your windscreen wipers and de-misters.
- Beware of other drivers not using headlights.
- Not accelerate to get away from a vehicle that is too close behind you.
- Check your mirrors before you slow down. Then use your brakes to warn drivers behind you that you are slowing down.
- STOP in the correct position at a junction with limited visibility and listen for traffic. When you are sure it is safe to emerge do so positively and do not hesitate in a position that puts you directly in the path of approaching vehicles.
You MUST NOT use front or rear fog lights unless visibility is seriously reduced, as they can dazzle other road users and obscure your brake lights. You MUST switch them off when visibility improves.
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