Among all weather conditions, fog is the most dangerous. Follow these tips:

  • Use your wipers and defroster as necessary for the best view.
  • Turn on your low-beam headlights. Do not use high-beams—it can actually decrease your visibility. High-beams will reflect back and cause a glare.
Car sun glare

Slow down. Fog makes it very difficult to judge speed—check your speedometer to make sure you have slowed down.

Increase your following distance and be prepared to stop within the space you can see in front of your vehicle. Watch for slow moving vehicles. Check your rearview mirror for vehicles approaching from behind.

Fog on freeway

Slow down in patchy fog conditions—be sure you turn on your vehicle's low-beam headlights.

It is easy to think you can see well enough to proceed through patchy fog. However, you may suddenly encounter a heavy fog bank and find yourself in a dire circumstance of not being able to see ahead, behind, or on either side of your vehicle.

Heavy fog on the road

If the fog becomes so thick that you can barely see, pull safely and completely off the road. Do not continue driving until the fog lifts and visibility improves.