Nov. 20: Garrett Morris? automatic three-position traffic light wins a patent on this date in 1923

By 1923, traffic congestion from cars was strangling the business districts of many U.S. cities. In most downtowns, police had adopted a system of lights switched by hand -- in the belief that motorists would not obey a signal if there wasn't a policeman present. Cleveland businessman and inventor Garrett Morris improved on those ideas [...]

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