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Idaho Class D Knowledge Practice Test
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Traffic Signals & Road MarkingsStandalone practice
A power failure leaves every signal lens dark at an intersection. How should you treat the intersection?
A and B approach a junction with blank signals and painted stop lines.
Correct answer: As a four-way stop
Why
When a traffic signal is not functioning, each approach must stop and drivers proceed in turn when it is safe.
Verified against Idaho Driver’s Handbook, July 2026 · Dark traffic signal · p. 56
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