The traffic light. An electronic, three-colored sign that exerts no physical control over any person. No traffic light has ever reached out to touch a person or vehicle. They have never uttered a spoken command to anyone passing through an intersection. Just light. Red. Yellow. Green. Three colored dots or squares, and occasionally some arrows. So simple and seemingly irrelevant, yet the traffic light has a profound impact on society. It establishes order. It encourages efficiency. It saves lives! Testimony of this fact is made when the traffic light is ignored. Chaos, injury, and even death can result.
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