What must you do if you're driving in fog?

When driving in fog, it is essential to use low beam headlights and reduce your speed. Low beam headlights are specifically designed to illuminate the road directly in front of your vehicle without causing excessive glare that can reflect off the fog, making visibility even worse. This allows you to see the road more clearly and helps other drivers see you as well.

Reducing your speed is crucial because fog can significantly decrease visibility, often to the point where you may not see obstacles, other vehicles, or traffic signals until it is too late. By driving slower, you provide yourself with more time to react to any hazards that may arise as your visibility is compromised. This combination of using low beams and reducing speed is the safest way to navigate through foggy conditions.