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Idaho Class D Knowledge Practice Test
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Vehicle Safety, Documents & TowingStandalone practice
In Idaho’s level, dry-road brake test at 20 mph, what is the maximum allowed braking distance for a passenger car?
Correct answer: 25 feet
Why
For a passenger vehicle other than a bus, the service-brake test limit is 25 feet from the moment braking controls are moved. The test uses a nearly level, dry, smooth, hard road without loose material. This is not total stopping distance including the driver’s perception and reaction.
Verified against Idaho Driver’s Handbook, July 2026 · Passenger-car foot-brake standard · p. 38
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