During heavy fog, which type of headlights should be used to improve visibility?

Using low-beam headlights during heavy fog is essential for improving visibility. High-beam headlights can actually create a glare effect when they reflect off the fog, rain, or snow, making it harder to see. In contrast, low-beam headlights are designed to cast light downward and to the side of the vehicle, helping to illuminate the road directly in front without reflecting excessively off the fog. This directional lighting is crucial for navigating safely in reduced visibility conditions.

Daytime running lights and parking lights are not suitable for driving in foggy conditions, as they do not provide adequate illumination for the road ahead. Daytime running lights are mainly intended for visibility to other drivers during the day, and parking lights do not offer enough brightness for navigating through reduced visibility situations, such as fog. Therefore, low-beam headlights are the best choice to enhance safety while driving in heavy fog.