When driving in heavy fog, what type of headlights should be used?

Using low beam headlights in heavy fog is essential for several reasons. Low beams provide a broader spread of light that illuminates the road directly in front of you without causing excessive glare. This is particularly important in foggy conditions, as high beam headlights can reflect off the moisture in the fog and create a blinding effect, making visibility even worse. Low beams help to enhance visibility by allowing you to see the road and any potential hazards clearly, while also helping other drivers see you.

Other options, such as parking lights or no headlights, would significantly reduce your visibility and make it difficult for others to see your vehicle. This combination of potential dangers highlights the importance of using low beam headlights during foggy conditions to ensure safety for both yourself and other road users.