Which of the following should a driver do when driving in fog?

When driving in fog, using low beam headlights is the recommended practice because they are designed to provide adequate visibility close to the vehicle without causing glare. High beam headlights can reflect off the fog, rain, or snow, creating a blinding effect that reduces visibility substantially.

Low beam headlights allow the driver to see the road immediately in front of them and illuminate the area without reflecting too much light back into their eyes, making it easier to navigate through foggy conditions. Keeping headlights on is important for visibility not just for the driver but also for other road users to see the vehicle. Turning off headlights entirely would leave the driver unable to see the road, leading to dangerous situations.

Utilizing low beam headlights ensures safer driving in fog and helps maintain better control of the vehicle in these challenging visibility conditions.