Knowing how much time and distance it takes to apply your brakes to completely stop your vehicle can help avoid errors in judgment that can lead to a collision. Three factors go into determining how long it takes to stop.
|1. PERCEPTION DISTANCE|
Perception Distance is how far a vehicle travels during the Perception Time. Perception Time is how long it takes to recognize a situation and understand that you need to stop. This can take about three-quarters of a second. Drivers with less experience often take longer to realize a danger exists.
|2. REACTION DISTANCE|
Reaction Distance is how far a vehicle travels during the Reaction Time. Reaction Time is how long it takes to respond to a situation by moving your foot from the accelerator pedal to the brake pedal. The average reaction time is three-quarters of a second.
|3. BRAKING DISTANCE|
Braking distance is how far the vehicle travels during Braking Time. Braking Time is how long it takes a vehicle to stop after the brakes are applied.
In short, Total stopping distance is the sum of perception distance, reaction distance and the braking distance. The chart below illustrates the minimum stopping distance for various speeds. The stopping distances are averages for stopping on smooth, dry pavement.