Create a following distance greater than 3 seconds when which of the following conditions exist?

Establishing a following distance greater than 3 seconds is essential in conditions where traction and visibility are reduced. When these factors are compromised, such as during rain, snow, fog, or when driving on uneven surfaces, the ability to react safely to sudden stops or obstacles is diminished. A greater following distance provides the additional time needed to react appropriately, allowing for safer stopping distances and minimizing the risk of collisions.

In contrast, driving on a straight road, having a driver behind you who is driving slowly, or operating a vehicle in clear weather typically does not necessitate an increased following distance. These conditions generally allow for adequate stopping time without needing to extend the distance significantly, supporting a safe driving environment. Therefore, the recommendation to increase the following distance in the presence of reduced traction and visibility aligns with safe driving practices aimed at preventing accidents.