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Illinois Class D Written Exam Practice
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Warning, Construction & Information SignsStandalone practice
A round yellow sign shows a black X and the letters R R. What is ahead?
Correct answer: A railroad crossing.
Why
The round railroad warning gives drivers time to slow, look, listen, and prepare to stop for a train.
Verified against Illinois Rules of the Road, July2026 · Round railroad warning sign · p. 66, 84
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