Summary
THE world's first traffic light was installed outside the Houses of Parliament in London in 1868. It consisted of a revolving red and green lantern and was designed to decrease the number of collisions between horse-drawn carriages.
Police officer William Potts, of Detroit, Michigan, USA, adapted train signals - with amber, green and red lights for street use in 1920.See the full content of this document
Extract
It All Began in 1868 Outside the Houses of Parliament
Garrett Augus...
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