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Illinois Class D Written Exam Practice
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Traffic Signals & Road MarkingsStandalone practice
What should you do when facing a flashing circular yellow traffic signal?
Correct answer: Slow down, check carefully, and proceed with caution.
Why
A flashing circular yellow signal warns you to use caution. Slow down, observe traffic and pedestrians, and proceed only when safe. It does not give an exclusive protected movement. A flashing yellow arrow separately applies to the indicated turn and requires yielding to conflicting traffic.
Verified against Illinois Rules of the Road, July2026 · Flashing yellow circular signal · p. 80
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