Fog in winter is a common occurrence and the AA say many drivers aren't using their fog, dipped and full lights properly to the detriment of other drivers. The AA advise when driving in fog:
* Use your dipped headlights at all times plus your windscreen wipers and demisters.
* Familiarise yourself with your front and rear fog lights. Know how to switch them on and off and use only when appropriate.
* Beware of other drivers not using headlights.
* Only drive as fast as conditions allow and maintain a greater distance between you and the car in front. Tailing someone's rear lights can give a false sense of security and is dangerous.
* If the road has street lights on, you probably don't need to use your fog lights.
* Be able to stop within your range of visibility. Particularly important on motorways and dual carriageways where you'll be travelling at speed.
* Don't accelerate to get away from a vehicle that is too close behind you.
* Check your mirrors before you slow down
* At a junction with limited visibility, stop, .wind down the window, and listen for traffic. When you are sure it is safe to emerge, do so without hesitation. Pausing too long puts you in the path of oncoming traffic
We also advise that before you set off, you should clean your windows and windscreen and ensure that all your lights are in working order. Only use front and rear fog lights where visibility is less than 100 metres; brake gently and earlier than usual so your brake lights warn drivers behind; use your wipers on an intermittent setting to clear the fine mist that can collect there, and don't forget to pack a high-viz jacket and a strong torch in case you have to leave the car. Do you have a warning triangle in your car? If so, don't forget to deploy it if your car breaks down.
Remember to turn OFF your fog lights when they are not needed.