Under what conditions must you increase your following distance?

Increasing your following distance in bad weather conditions or when driving a larger vehicle is crucial for safe driving. Bad weather, such as rain, snow, or fog, reduces visibility and road traction, increasing the stopping distance needed to avoid a collision. The presence of larger vehicles also necessitates a greater following distance due to their longer stopping distances and larger blind spots. This additional space provides a buffer that allows for better reaction time and helps reduce the risk of accidents in challenging driving conditions.

In contrast, driving in clear sunny weather or in heavy traffic may not require as significant an increase in following distance, as visibility is generally better. Using cruise control doesn't directly imply a need for a longer following distance either, although it is essential to remain attentive and adjust driving habits responsibly.