Love it you blacks always fall into my trap. The first known traffic signal appeared in London in 1868 near the Houses of Parliament. Designed by JP Knight, it featured two semaphore arms and two gas lamps. The earliest electric traffic lights include Lester Wire’s two-color version set up in Salt Lake City circa 1912, James Hoge’s system (US patent #1,251,666) installed in Cleveland by the American Traffic Signal Company in 1914, and William Potts’ 4-way red-yellow-green lights introduced in Detroit beginning in 1920. New York City traffic towers began flashing three-color signals also in 1920. Peanut Butter? Nope again look it up. Open heart surgery…yeah the best debunk by bklacks to claim everything is racism uh huh good intellectual rebutall. and as far as what have white people invented? EVERYTHING. End of debate whites win again.