Fog and vision — Georgia Permit Test

In heavy fog Georgia says to reduce your driving speed, and to reduce it further the moment you see headlights or tail lights ahead of you.

Fog makes the car in front look farther away than it is, so what you see is already too close.

Reduce speed further when you see headlights or red tail Lights. These indicate the presence of another vehicle and, due to fog, it may be more difficult to accurately judge the distance between your vehicle and others

In heavy fog you dim your headlights, because bright lights make a glare off the fog that leaves you seeing less than ordinary headlights would.

The fog throws your own light back at you, so the brighter the beam the whiter the wall.

Dim your headlights. Bright lights produce a glare in heavy fog, actually making it more difficult to see than when using regular headlights

Georgia says not to drive with the parking lights or the hazard lights on in fog.

Hazard lights say you have stopped, so a moving car wearing them tells the driver behind a lie.

Do not drive with parking or hazard lights on.

Where you can, Georgia says avoid driving in heavy fog altogether rather than working out how to do it.

No technique makes up for not being able to see, and the fog will have lifted in an hour.

If possible, avoid driving in heavy fog.

You see tail lights ahead of you in heavy fog. What does Georgia say to do?

Slow down further than you already had. Fog makes the car in front look farther away than it is, so what you see is already too close. Georgia Driver's Manual, p.106: “Reduce speed further when you see headlights or red tail Lights. These indicate the presence of another vehicle and, due to fog, it may be more difficult to accurately judge the distance between your vehicle and others”