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Iowa Class C Knowledge Test Practice
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Passing target: 20/25 correct (TLA practice target)
Observation, Speed & SpaceStandalone practice
You are on an Iowa secondary road that is not surfaced with concrete, asphalt or a combination of them. It is nighttime and no other restriction applies. What default maximum applies?
Correct answer: 50 mph.
Why
For this unsurfaced secondary-road category, §321.285(4) specifies 55 mph from sunrise to sunset and 50 mph from sunset to sunrise, unless another restriction applies. The 2026 Act changed subsection 3, not this special provision. The manual’s broad daytime 60-mph summary is not used to override the statute.
Verified against Iowa Driver's License Manual and current primary rules · Night speed on an unsurfaced secondary road · p. 42
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