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The first interconnected traffic signal system was installed in Salt Lake City in 1917, with six connected intersections controlled simultaneously from a manual switch. [3]: 32 The first four-way, three-color traffic light was created by police officer William Potts in Detroit, Michigan in 1920.
In New Orleans, arc lamps were used for street lighting starting in 1881. In 1882, the New Orleans Brush Lighting Company installed one hundred 2,000-candlepower arc lamps along five miles of wharf and riverfront; by 1885, New Orleans had 655 arc lights. [1] In Chicago, arc lamps were used in public street lighting starting in 1887. [1]
Charles Adler Jr. (June 20, 1899 – October 23, 1980) was an American inventor and engineer.He is most known for developing devices meant to improve transportation safety, including sonically actuated traffic lights, colorblind road signals, pedestrian push-buttons, and flashing aircraft lights.
A number of street light control systems have been developed to control and reduce energy consumption of a town's public lighting system. These range from controlling a circuit of street lights and/or individual lights with specific ballasts and network operating protocols.
The world's first traffic light was installed on 9 December 1868 in London near Westminster Bridge, at the intersection of Great George Street and Bridge Street, London SW1. However, in 1869, a gas leak caused one of the lights to explode, badly injuring the policeman operating it, and the system fell out of favour and was removed as a result.
c. 1885 Incandescent gas mantle invented, revolutionises gas lighting. 1886 Great Barrington, Massachusetts demonstration project, a much more versatile (long-distance transmission) transformer based alternating current based indoor incandescent lighting system introduced by William Stanley, Jr. working for George Westinghouse. [6]
It was installed by the American Traffic Signal Company on the corner of East 105th Street and Euclid Avenue in Cleveland, Ohio, on August 5, 1914. [10] [11] [12] The first four-way, three-colour traffic light was created by William Potts in Detroit, Michigan in 1920. [13]
William Potts (May 1883 – 1947) was a Detroit police officer who is credited with inventing the modern, three-lens traffic light in Detroit in 1920. (A gas-powered, two-lens, red/green traffic signal was invented in London in 1868 by John Peake Knight, though after a short test installation, traffic lights were not seen again in the U.K. until 1929.) [1]