This means that after the car in front of you passes a fixed object (like a sign or a landmark), you should count three seconds before your vehicle passes the same object. If you pass it before three seconds are up, you're following too closely.
Several factors influence the appropriate following distance, requiring a greater distance than the 3-second rule in many situations:
* Speed: The faster you're driving, the longer your following distance should be.
* Weather conditions: Rain, snow, or fog significantly reduce visibility and traction, requiring a much greater following distance.
* Road conditions: Slippery roads, potholes, or construction zones necessitate increased following distance.
* Your vehicle's braking ability: Older vehicles or those with worn brakes require more stopping distance.
* Traffic conditions: Heavy traffic necessitates a longer following distance to allow for more reaction time.
Following too closely is dangerous and a major cause of rear-end collisions. Always maintain a safe following distance, even if it means following the 3-second rule and exceeding it when necessary. Local laws may also specify minimum following distances, so it's important to be aware of those as well.