The Official Highway Code

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Driving in adverse weather conditions

Fog

235

When driving in fog you should

  • use your lights as required (see Rule 226)
  • keep a safe distance behind the vehicle in front. Rear lights can give a false sense of security
  • be able to pull up well within the distance you can see clearly. This is particularly important on motorways and dual carriageways, as vehicles are travelling faster
  • use your windscreen wipers and demisters
  • beware of other drivers not using headlights
  • not accelerate to get away from a vehicle which is too close behind you
  • check your mirrors before you slow down. Then use your brakes so that your brake lights 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.