What action should be taken when driving in fog?

When driving in fog, it is crucial to use low beam headlights and reduce speed. Low beam headlights provide adequate illumination without causing glare that can reflect off the fog, which can obscure visibility further. High beam headlights can create a blinding effect in foggy conditions because the light is reflected back into the driver’s eyes by the fog, thereby decreasing visibility.

Additionally, reducing speed allows for better control of the vehicle and gives the driver more time to react to any obstacles or changes in the road conditions. Driving at the speed limit or faster, irrespective of visibility, is unsafe in fog as it can lead to accidents due to insufficient time to respond to hazards. Using hazard lights while driving is generally advised for stationary vehicles or to warn other drivers of a slowdown, but driving too fast with them on in fog can lead to increased danger, as it can confuse other drivers. Therefore, the most effective strategy in fog is to use low beam headlights and drive at a reduced speed for safety.