The stopping distance of your vehicle depends on which of the following factors?

• A. Reaction distance
• B. Braking distance
• C. All of the above
• D. Perception distance

Answer: (C)

Stopping distance is made up of three parts: perception distance, reaction distance, and braking distance. Perception distance is how far you travel from spotting a hazard until your brain processes it and you decide to act. Reaction distance is the distance you cover during the moment your foot moves from the accelerator to the brake after you decide to slow down. Braking distance is the distance traveled once you start braking until you come to a stop. The total stopping distance is the sum of these three parts, so anything that affects any of them—your speed, visibility, road conditions, or the condition of your tires and brakes—will change the overall distance you need to stop. Higher speeds lengthen all parts, and slippery pavement or poor visibility can lengthen braking and perception times as well. Since all three components contribute, stopping distance depends on perception, reaction, and braking distances.