Stopping Distance (Reaction Distance + Braking Distance)
The distance required for a vehicle to come to a complete stop (called stopping distance) is calculated as the sum of the reaction distance and the braking distance.
Reaction Distance + Braking Distance = Stopping Distance
Below are the definitions of each type of distance, assuming dry road conditions and tires in good condition (applicable to standard passenger cars).
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When the driver is fatigued, braking is delayed → reaction distance is longer. If the road is slippery or tires are worn → braking distance is longer.