If you increase your speed from 20 to 60 mph (original speed times 3), how much more braking distance is required at 60 mph than at 20 mph?
The faster you drive, the greater the impact or striking power of your vehicle. When you double your speed from 20 to 40 mph the impact is 4 times greater. The braking distance is also 4 times longer. Triple the speed from 20 to 60 mph and the impact and braking distance is 9 times greater.