What is perception reaction distance (PRD)?

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Multiple Choice

What is perception reaction distance (PRD)?

Explanation:
Perception reaction distance is the distance your vehicle covers from the moment you notice a hazard to the moment you begin to brake or take action. It equals speed multiplied by perception-reaction time, so it increases with faster speeds or longer reaction times. This distance is the first part of stopping distance, with braking distance following once braking starts. It’s not the distance to the hazard, not the distance after braking begins, and not a time value.

Perception reaction distance is the distance your vehicle covers from the moment you notice a hazard to the moment you begin to brake or take action. It equals speed multiplied by perception-reaction time, so it increases with faster speeds or longer reaction times. This distance is the first part of stopping distance, with braking distance following once braking starts. It’s not the distance to the hazard, not the distance after braking begins, and not a time value.

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