What are the components of the stopping distance?

1. The sum of the braking distance and the gap from the vehicle in front.
2. The average of the driver’s braking distance and reaction distance.
3. Correct answer: The sum of the reaction time and of the braking distance.
4. The sum of the decision distance and the execution distance of a reasonable driver.

WhyStopping distance is the sum of the reaction distance and the braking distance. Not an average and not the gap to the car in front.