What should you do when driving in heavy fog?

When driving in heavy fog, using low-beam headlights is the appropriate action to take. This is because low beams are designed to provide better visibility in low-light conditions without reflecting off the fog, rain, or snow, which can create a hazy glare and further obscure your view. High-beam headlights, on the other hand, tend to scatter light, reflecting off the moisture in the fog and causing a white-out effect that can actually reduce visibility.

Driving at normal speed in heavy fog is not advisable because visibility is significantly decreased, and it’s important to adjust your speed to the conditions to maintain safety. Turning on hazard lights is also not recommended for driving; they are intended to signal a stationary vehicle or a temporary issue, not to provide visibility while moving through fog. Keeping speeds low and using the appropriate headlights enhances safety for yourself and others on the road during such challenging conditions.