When driving at night, how can a driver maximize visibility in fog?

Using low beams while driving in fog is the best option because high beams can create a glare that reflects off the fog and can obscure visibility even more. Low beams are designed to provide adequate illumination without illuminating the fog directly above the road, which helps reduce reflection and improves visibility.

Turning off all lights would be dangerous, as it would make it very difficult to see the road and other vehicles, increasing the risk of an accident. Using only parking lights is also not sufficient for safe driving in fog; parking lights are designed for indicating a parked vehicle, not for illuminating the road. Therefore, utilizing low beams is the optimal choice for maximizing visibility in foggy conditions, allowing drivers to see better while minimizing the reflective glare caused by fog.