When is it advisable to increase your following distance to four or more seconds?

Increasing your following distance to four or more seconds is particularly advisable in adverse weather conditions or when driving a large vehicle because these situations require more time to react to sudden changes in traffic or road conditions. Adverse weather, such as rain, snow, or fog, can significantly reduce traction and visibility, increasing the likelihood of needing to stop or maneuver more cautiously. A longer following distance provides the driver with ample time to react safely if the vehicle in front suddenly slows down or stops.

Additionally, larger vehicles require more time to stop compared to smaller cars due to their mass and momentum. When you’re behind a larger vehicle, it's essential to maintain that increased following distance not only for safety but also to have a clearer view of the road ahead, as larger vehicles can block your vision of traffic conditions. In summary, adjusting your following distance based on weather conditions and vehicle size helps ensure safer driving practices.