Which components make up the total stopping distance?

Which components make up the total stopping distance?

• A. The sum of perception distance, reaction distance, lag time distance and braking distance
• B. The distance traveled from the moment the brakes are applied to the vehicle stops
• C. The difference between braking distance and reaction distance
• D. The sum of the speed and the weight divided by the amount of traction

Answer: (A)

Total stopping distance is how far you travel from the moment you spot a hazard until you come to a full stop. It includes everything that happens before the brakes stop the car: the distance you cover while you perceive the hazard (perception distance), the distance during the time you decide to brake and start taking action (reaction distance and any extra lag time), and the distance the car travels while the brakes are slowing it down (braking distance). Add all of these together—the perception distance, the reaction and lag time portions, and the braking distance—and you get the total stopping distance. The other descriptions only cover part of the process (like braking distance alone) or don’t account for the full sequence, so they don’t describe the total distance required to stop.

Total stopping distance is how far you travel from the moment you spot a hazard until you come to a full stop. It includes everything that happens before the brakes stop the car: the distance you cover while you perceive the hazard (perception distance), the distance during the time you decide to brake and start taking action (reaction distance and any extra lag time), and the distance the car travels while the brakes are slowing it down (braking distance). Add all of these together—the perception distance, the reaction and lag time portions, and the braking distance—and you get the total stopping distance. The other descriptions only cover part of the process (like braking distance alone) or don’t account for the full sequence, so they don’t describe the total distance required to stop.