What is the legal requirement for headlights during foggy conditions?

In foggy conditions, it is crucial to use low beam headlights. This is because low beams are designed to cast a light that is closer to the ground, which reduces the likelihood of the light reflecting off the fog, rain, or snow back into the driver's eyes. High beam headlights, on the other hand, can actually reflect off the moisture in the air, causing glare that impairs visibility.

Using hazard lights only is not advisable in fog as they indicate a vehicle is stopped or moving slowly, which can confuse other drivers. Additionally, headlights are required during foggy conditions for safety reasons, so they cannot simply be turned off. Therefore, the legal requirement in such conditions is to utilize low beam headlights to enhance safe driving and ensure better visibility for the driver as well as for others on the road.