Sunday, May 15, 2011

http://www.squidoo.com/traffic-signals

Traffic lights were used previous to cars came onto the roads. They were invented in 1868 by British railroad signal engineer, JP Knight who created a lantern with Red and Green signals. This was mounted in from of the British House of Commons to control the flow of Horse Buggies as well as pedestrians.

http://www.squidoo.com/traffic-signals


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