World Day celebrated on August 5th traffic light
, mark International Day light. Traffic light. Photo: torange.biz This day in 1914 in the US in Cleveland scripting predecessor of modern traffic lights that had green and red signals and switches when a sound. System managed cop who was sitting in a glass boothand at the intersection. But the first traffic light invented by Briton Jay Knight in 1868, says Wikipedia. This traffic light was installed in London near Parliament, semaphore had two wings and managed manually. Raised horizontal wings meant signal « & raquo ;, feet and dropped at 45 ° &Ndash; move with caution. At night, use solaruvavsya gas lantern that moved, using it under fed signals of red and green. Traffic light used to ease the transition pedestrians across the street, and it signals intended for commercial vehicles. Unfortunately, 2 January 1869 gas lantern light exploded and injured the policeman that supervisoruvav lights. The first automatic traffic lights switching without direct human intervention was developed and patented in 1910 by Ernst Syrrinom of Chicago. He used a traffic light labels « Stop » and « Proceed & raquo ;, but do not illuminate. In 1920, using three-color traffic lights were yellow signalestablished in Detroit (Michigan, USA) and New York. The inventors were police William Potts and John F. Harris. In Europe, similar to traffic lights were installed in 1922 in Paris at the intersection of Rue de Rivoli and the Boulevard Sebastopol and Hamburg Stefanplatts Square. And in England – in 1927 in Wolverhampton. Beforeand a traffic light was installed in the Ukraine in 1936 in Kharkov.Source: http://artlife.rv.ua/