When driving in heavy fog at night, what type of headlights must a driver use?

Using low-beam headlights in heavy fog at night is essential for safe driving. This is because low-beam headlights produce a shorter and broader light pattern that is less likely to reflect off the fog, rain, or snow back into the driver’s eyes. When high-beam headlights are used in foggy conditions, the light can create a brilliant glare and illuminate the moisture in the air, reducing visibility instead of improving it. While fog lights are specifically designed to help improve visibility in fog under certain conditions, relying solely on them might not provide the comprehensive illumination needed for full situational awareness. Therefore, low-beam headlights are the best choice to ensure that a driver can see the road clearly while minimizing glare and maximizing visibility for both the driver and other road users.