Switch on headlights and fog lights if you have them, drive no faster than a speed that you can safely stop in the distance you can see to be clear.
low lights
You should use low beams when driving in fog. It is more difficult to see driving with high beams in fog.
When driving in fog it is best to drive with low your light on low beam. This will ensure that you get clear vision. You can use fog lights if you have them on your car and do not speed.
low beams
Low beams. Better yet, if you have them, use fog lamps that are mounted low on the vehicle and are aimed mostly down at the road.
When driving in fog you should always use your low beams. Using your rear fog light when visibility is less than 100 meters is also a really good idea.
Slow down
fog light and/or low beam
You should never use high beams when you are driving in fog because they shine up and ahead which will be reflected straight back into your eyes by the fog. Low beams (which aim downwards) and front fog lights (which are lower) are far better suited.
No...it lights up the fog making vision worse. Fog normally is least dense at the bottom and rarely reaches all the way to the ground. Thats why fog lights are way down low and why low beams are better than high beams when driving in fog.
hmmm...i think they don't really help because the lights would be hard to see with all the fog in the way...sorry if that's not the most detailed answer. hope it helped
low beam