See and be seen
Use dipped headlights when driving in fog or if visibility is seriously reduced use your front or rear fog lights. Remember to switch them off when visibility improves. Use your windscreen wipers and demisters.
Check your mirrors and slow down
Keep a safe distance behind the vehicle in front. You should always be able to pull up within the distance you can see clearly.
Do not hang on to the tail lights of the vehicle in front
This gives a false sense of security. In thick fog, if you can see the vehicle in front you are probably too close unless you are travelling very slowly.
Be aware of your speed
You may be going much faster than you think. Do not accelerate to get away from a vehicle which is too close behind you. When you slow down, use your brakes so that your brake lights warn drivers behind you.
When the word fog is shown on a roadside signal but the road appears to be clear, be prepared for a bank of fog or drifting smoke ahead. Fog can drift rapidly and is often patchy. Even if it seems to be clearing, you can suddenly find yourself back in thick fog.
Many drivers think nothing of driving with their front fog lights on when in fact by doing so they are committing an offence and could be liable for a fine. You are only allowed to use front and rear fog lights in fog where visibility is 100 metres or less. The lights are almost as powerful as full beam headlights and can dazzle other drivers.