Final answer:
When operating during restricted visibility, it is important to reduce speed to ensure safety on the road.
Step-by-step explanation:
When operating during restricted visibility, such as in fog or heavy rain, it is important to reduce speed to ensure safety on the road. Reduced visibility affects your ability to see and react to hazards, so slowing down gives you more time to brake or maneuver if necessary. For example, if you are driving at a higher speed and suddenly encounter an unexpected obstacle, it would be harder to stop in time to avoid a collision. By reducing speed, you increase the margin of safety and decrease the risk of accidents.