Fog can greatly reduce the visibility of other vehicles, pedestrians, and traffic signals. When driving in fog, you should:

Fog can greatly reduce your ability to see other vehicles, pedestrians, and traffic signals. When driving in fog, drive cautiously and at reduced speeds. Do not use high beam headlights. Low beams better illuminate the road and objects ahead in foggy conditions.

• Drive cautiously and reduce your speed.
• Not use your high beam headlights.
• Use low beam headlights to better illuminate the road and objects.
• All of the above.