Which headlights should you use when driving in fog?

Using low (dim) headlights when driving in fog is essential for safety and visibility. High (bright) headlights can create a glare when they reflect off the fog, rain, or snow, making it difficult for you to see the road and for other drivers to see you. Low beams, on the other hand, direct light downward and help illuminate the road immediately in front of you without causing as much glare. This allows for better visibility in low-visibility conditions caused by fog.

Emergency flashing lights are intended for use when your vehicle is stopped or in an emergency, not for general driving, and parking lights do not provide sufficient illumination for safe driving. Therefore, using low headlights is the best practice for navigating through foggy conditions safely.