Why should you always reduce your speed when driving in fog?

Reducing your speed in fog is essential because fog significantly reduces visibility, making it challenging to see road signs, other vehicles, pedestrians, and potential hazards. When visibility is limited, the distance required to react to unexpected situations increases, and traveling at a lower speed provides the driver with more time to assess the road ahead and respond appropriately. This enhanced response time can prevent accidents and ensure safer driving conditions when visibility is compromised.

While factors like fuel efficiency and legal requirements may influence driving behavior under certain conditions, they are not the primary reasons for adjusting speed in fog. Instead, the critical issue is the increased difficulty in perceiving events and obstacles while driving, which can only be mitigated by reducing speed.