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Illinois Class D Written Exam Practice
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Observation, Speed & SpaceStandalone practice
Unless another limit is posted, what is the maximum speed listed for an Illinois alley?
Correct answer: 15 mph.
Why
The default maximum for an alley is 15 mph unless a different lawful limit is posted.
Verified against Illinois Rules of the Road, July2026 · Default alley speed · p. 27
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