Why is it important not to rely solely on traffic lights at intersections?

• Traffic lights may occasionally malfunction.
• Not all drivers obey traffic light signals.
  Explanation:

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  At intersections, it's important not to rely solely on traffic lights, as some drivers may not obey them. Before you enter an intersection, be sure to look left, right, and ahead for any approaching traffic.

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• Traffic lights may change unexpectedly.
• Traffic lights can be confusing.