What is the proper headlight usage when driving in foggy conditions?

In foggy conditions, using low beams is the proper headlight usage because low beams direct light downwards and spread it over a wider area closer to the road. This is essential because fog consists of tiny water droplets that can reflect light back towards the driver. High beams, on the other hand, project light further ahead and can create a glare as the light reflects off the fog, ultimately reducing visibility.

Turning off headlights completely is unwise as it can make a vehicle less visible to others, increasing the risk of an accident. Using only daytime running lights is also insufficient since they may not provide adequate illumination in poor visibility conditions, potentially endangering the driver and others on the road. Thus, low beams are the best choice to ensure clear sightlines while minimizing glare, enhancing safety in foggy weather.