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Idaho Class D Knowledge Practice Test
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Observation, Speed & SpaceStandalone practice
When can driving below the posted maximum still violate Idaho law?
Correct answer: When it unnecessarily impedes the normal and reasonable flow of traffic
Why
A driver may not move so slowly that normal traffic is obstructed, unless reduced speed is necessary for safe operation or legal compliance.
Verified against Idaho Driver’s Handbook, July 2026 · Driving too slowly · p. 69
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