What factors might necessitate extra following distance?

Extra following distance is often necessary when you are following drivers who cannot see you. This situation can arise when you are driving in larger vehicles, in blind spots, or when visibility is compromised due to weather conditions or poor lighting. When the driver ahead may not be aware of your presence, maintaining a greater distance allows you more time to react to any sudden braking or obstacles that may arise.

In contrast, driving with high beams on is typically a consideration for visibility rather than following distance. Following drivers who can see you may suggest a less critical need for extra distance since they are aware of your presence and can anticipate your vehicle's actions closely. Driving on well-lit roads often improves visibility for all drivers, reducing the necessity for additional following distance due to better overall awareness and perception of surroundings.