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Idaho Class D Knowledge Practice Test
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Passing target: 85% (34/40)
Warning, Construction & Information SignsStandalone practice
A round yellow sign displays a black X and the letters RR. What should you expect?
Correct answer: A railroad crossing ahead
Why
The circular yellow railroad sign gives advance warning of tracks and the possibility that a driver will need to stop.
Verified against Idaho Driver’s Handbook, July 2026 · Round railroad advance sign · p. 52
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