Question

Which department first started the use of tràfic signals?​

Answer 1

Answer:

The first electric traffic light was developed in 1912 by Lester Wire, a policeman in Salt Lake City, Utah. On August 5, 1914, the American Traffic Signal Company installed a traffic signal system on the corner of East 105th Street and Euclid Avenue in Cleveland, Ohio

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Answer 2

Answer:

The world's first electric traffic signal is put into place on the corner of Euclid Avenue and East 105th Street in Cleveland, Ohio,