Dense fog seriously reduces your visibility and makes driving very dangerous. Our advice is to switch on dipped headlights and fog lamps, reduce your speed and keep a safe distance from the vehicle in front. If the fog closes in, reduce your speed further and take your time getting to your destination.
The added dangers posed by dense fog is that a collision involving one vehicle can quickly involve many others, especially if driving too fast and too close to one another.
The greatest risk is of a multiple-vehicle pile-up on roads with higher speeds such as motorways and dual carriageways. As you enter fog, check your mirrors and slow down. Use your foot brake lightly so that your
lights warn following drivers.