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Illinois Class D Written Exam Practice
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Warning, Construction & Information SignsStandalone practice
A yellow diamond shows a truck descending a steep slope. What should a driver prepare for?
Correct answer: A steep hill; slow down before starting down.
Why
The downgrade warning gives time to reduce speed and select a safe method of controlling the descent.
Verified against Illinois Rules of the Road, July2026 · Steep-downgrade warning · p. 74
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