What should you do in case of heavy fog while driving?

In heavy fog, it is crucial to prioritize visibility and safety. Reducing your speed allows for better reaction time in low visibility conditions, which is essential when navigating through fog. At reduced speeds, you can better identify obstacles, other vehicles, and roadway signals, thereby decreasing the risk of accidents.

Using low beam headlights is important because they are designed to illuminate the road immediately in front of your vehicle without causing glare. High beams can reflect off the fog, creating a wall of light that makes visibility worse, rather than better. Low beams cut through the fog more effectively, providing clarity for you and making your vehicle more visible to others on the road.

Choosing to maintain the speed limit in fog can be dangerous; posted limits assume normal driving conditions, and adapting your speed according to the prevailing weather conditions is vital for safety. Turning off your headlights entirely is also unsafe, as it leaves you and your vehicle invisible to others, drastically increasing the risk of accidents. Therefore, reducing your speed and using low beam headlights is the best practice in heavy fog.