Correct answer
Approximately 1 second.
Approximately 1 second. This is a teaching reference, not an exact guaranteed time for every driver or situation. It includes perceiving the danger, deciding and beginning to act, rather than ending merely at the decision. Fatigue, distraction, alcohol, some medicines and other conditions can lengthen it. The vehicle keeps moving during this interval, before the braking distance begins.
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Approximately 1 second.
As a general reference, 5 seconds.
As a general reference, 10 seconds.
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