If fog suddenly descends and visibility declines rapidly, you should...?

Pulling off the road and waiting for conditions to improve is the safest response in the event of sudden fog that significantly reduces visibility. When visibility is poor, the risk of accidents increases dramatically due to the inability to see other vehicles, road signs, or potential hazards. By parking in a safe location off the road, you minimize the chances of being involved in a collision, allowing other drivers to pass by without the added danger of unexpected obstacles on the road caused by your vehicle.

It is important to ensure that you pull off the road completely and turn on your hazard lights to make your presence known to other drivers. This would help in reducing confusion and potential collisions. Maintaining a stationary position until conditions improve provides a clear strategy for safety, helping both you and other road users navigate the adverse conditions more effectively.