What is defined as the distance required for a driver/operator to recognize a hazard and come to a complete stop?

Total stopping distance is defined as the complete distance a vehicle travels from the moment a driver identifies a hazard until the vehicle comes to a complete stop. This measurement accounts for both the reaction distance and the braking distance.

Reaction distance is the distance a vehicle travels while the driver is recognizing a hazard and deciding to act, while braking distance is the distance needed for the vehicle to stop once the brakes are applied. Total stopping distance combines both these distances to provide a comprehensive understanding of how quickly a driver can stop in response to an emergency situation, reflecting the driver’s reaction time and the vehicle's braking capabilities. This holistic view is crucial in emergency response and safety protocols.