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Montana Class D Knowledge Test Practice
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Observation, Speed & SpaceStandalone practice
On the same road, a car needs a certain distance to stop from 30 mph. How much distance does it need to stop from 60 mph?
Correct answer: More than three times as far as from 30 mph
Why
The faster you go, the more ground you cover before you react and while you brake. The manual gives examples for dry pavement with good tires and brakes: a stop can take about 200 feet from 30 mph and about 400 feet from 50 mph. If you cannot see that far ahead, slow down.
Verified against Montana Driver Manual English · Adjusting Speed · p. 69, 73
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