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What does it mean when you see red lights at a traffic stop?

  1. Proceed with caution

  2. You may proceed if your exit is clear

  3. You must stop and wait behind the white stop line

  4. Reduce speed and prepare to stop

The correct answer is: You must stop and wait behind the white stop line

Red lights at a traffic stop indicate that you must come to a complete stop behind the white stop line and wait for the light to turn green. Option A is incorrect because yellow lights indicate "proceed with caution," not red lights. Option B is incorrect because you must stop at a red light regardless of the condition of your exit. Option D is incorrect because you must fully stop at a red light, not just reduce your speed.