What should you do when driving in fog?

When driving in fog, using low beam headlights and slowing down is essential for safety. Low beam headlights provide adequate illumination without reflecting off the fog, which can create glare and reduce visibility even further. This is crucial because fog can significantly limit how far ahead drivers can see, making it challenging to navigate the road safely.

Slowing down is also important because visibility is reduced, and stopping distances can increase in foggy conditions. By decreasing speed, drivers have more time to react to any obstacles or changes in traffic conditions. This combination of using low beams and reducing speed helps maintain better control of the vehicle and enhances safety for the driver and others on the road.

The other strategies mentioned in the choices, such as using high beam headlights, pulling over until the fog clears, or driving at normal speed while increasing following distance, might not be as effective. High beams can cause glare in fog, pulling over can be risky if safe locations are not readily available, and driving at normal speed can be hazardous due to decreased visibility.