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Inventions

Did black people invent traffic signals?

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January 02, 2011 5:01AM

The traffic signal was invented in 1868 in London before the invention of the car. It was a revolving lantern with red and green signals. On Jan. 2, 1869 the light exploded hurting the policeman who was operating it. The next attempt was made by Detroit Police Officer who decided to make a light to control the increasing numbers of cars on the road. In 1920 he used a red, amber, and green railroad lights and 37.00 of wire to make the first 4 way light. Within a year Detroit had 15 lights controlling traffic. There is no mention of ethnicity of the inventors.