When must a driver use low beams while driving in fog?

Using low beams while driving in fog is crucial because fog reflects light, especially high beams, which can create a blinding effect and reduce visibility even further. Low beams are designed to illuminate the road immediately in front of the vehicle without reflecting off the fog. This allows drivers to see better and be seen by others on the road.

In fog conditions, it is important for drivers to prioritize safety and visibility. By using low beams, drivers can enhance their ability to see the road, any obstacles, and other vehicles. Therefore, low beams should always be used in fog to ensure maximum visibility and safety, regardless of the time of day or weather conditions.