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In 1912, Garrett A. Morgan invented the three-position traffic signal, which improved road safety by introducing a yellow light to indicate caution between the stop (red) and go (green) signals. His invention helped to regulate traffic more effectively and contributed to the development of modern traffic control systems. Morgan's contributions extended beyond traffic signals, as he was also known for inventing a safety hood smoke protector, an early version of the gas mask.

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1w ago

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