Google celebrates the 101th anniversary of the first electric traffic signal with a special doodle on its homepage. The animated doodle shows cars with the letters spelling “G-O-O-G-L-E” at a traffic signal in a black and white colour variant.
The first electric traffic light was developed in 1912 by Lester Wire, a policeman in 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 consisted of four pairs of red and green lights that served as stop-go indicators and each of them was mounted on a corner post. It was wired to a manually operated switch inside a control booth, the system was configured so that conflicting signals were impossible.
Google's Doodle celebrates 101st anniversary of first electric traffic signal system – Tech2