Stopping distance = free running distance + braking distance
What is stopping distance?
A certain distance (free running distance + braking distance) is needed from the moment an
obstacle appears ahead until you bring your vehicle to a complete stop. This is called as stopping
distance.
What is braking distance?
Tire slip occurs until the vehicle stops completely when the the brake is applied.
This slip is what we call a braking distance.
What is free running distance?
The free running distance is the time from the driver sees the obstacles and begins to prepare for
depressing the brake pedal until the moment the brake pedal is depressed.