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Traffic lights, also known as traffic signals, were first invented in 1868 in London to control the growing number of horse-drawn carriages and pedestrians. They typically use a standard color scheme: red for stop, yellow for caution, and green for go, which is recognized internationally. Modern traffic lights often include features like timers and pedestrian signals, enhancing safety and efficiency at intersections. They can also be equipped with sensors to adjust their timing based on real-time traffic conditions.

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1mo ago

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