The first electric traffic light was developed in 1912 by Lester Wire, an American policeman of Salt Lake City, Utah, who also used red-green lights. On 5 August 1914, the American Traffic Signal Company installed a traffic signal system on the corner of East 105th Street and Euclid Avenue in Cleveland, Ohio. It had two colors, red and green, and a buzzer, based on the design of James Hoge, to provide a warning for color changes. The design by James Hoge allowed police and fire stations to control the signals in case of emergency.
The first non-electric, gas lit, traffic lights were installed on 10 December 1868, outside the British Houses of Parliament in London to control the traffic in Bridge Street, Great George Street and Parliament Street. They were promoted by the railway engineer J. P. Knight and constructed by the railway signal engineers of Saxby & Farmer. The design combined three semaphore arms with red and green gas lamps for night-time use, on a pillar, operated by a police constable. The gas lantern was manually turned by a traffic police officer, with a lever at its base so that the appropriate light faced traffic.
Samsung to launch flexible display, cut smartphone models in 2015
Guetst: VERY MUCH
A new official edition of the Constitution of the Republic of Uzbekistan was published
Abdujavlon: can I download a new edition
Turin University in Tashkent to Accept 175 Students
Guetst: Xurshidjon Abduxalilov
Dzhavohir Sindarov became world chess champion
Guetst: MY CONGRODULATION