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Illinois Class D Written Exam Practice
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Traffic Signals & Road MarkingsStandalone practice
The lane-control signal above your lane changes to a steady yellow X. What should you do?
Correct answer: Leave the lane safely before the red X appears.
Why
A yellow X warns that the lane-control signal will change to red. Check traffic, signal, and leave the lane safely before the red X appears. Do not make an abrupt lane change or force another driver to yield.
Verified against Illinois Rules of the Road, July2026 · Yellow X over a lane · p. 81
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