The best option when driving in fog is not driving in fog. But sometimes, you might be taken by surprise driving through an area of thick fog, and pulling over is not always a safe option.
In good weather, you want a 2-second count distance. Driving in the fog, you will need about 5-seconds.
You can't see that far in front of your camper van, so you need extra stopping time in case something looms up in front of you like a vehicle or animal.
When you are entering the fog, get an idea of where other traffic is around you buy checking your mirrors.
Knowing where other drivers are will help you maintain your distance and reduce the chances of collisions.
Driving fast does not allow you enough reaction time.
Driving slowly gives other vehicles around you time to predict your movements.
Fog is moisture, and it will build up on your windshield. Keep your wipers on to keep droplets from forming on your windshield and blocking your already limited visibility.
Make sure people can easily spot your vehicle using your low-beam (and fog lights, if you have them).
Never use your high-beam lights; they will only compete with the fog, reflecting and making it hard to tell what is in front of you.
If your visibility has been reduced, rely on your sense of hearing. Listen for other drivers that may be coming close to you.
If it becomes too foggy, you should stop.
Move as far as you can away from the main road. Keep your hazard lights on but turn off your headlights to save battery.
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