The Acme Corporation is a fictional corporation that features prominently in the Road Runner/Wile E. Coyote cartoons as a running gag
featuring outlandish products that fail or backfire catastrophically at the worst possible times. The name is also used as a generic title inmany cartoons, films, TV series and comics.The Traffic lights that existed in Los Angeles during the time the Warner Bros. cartoons were manufactured by the Acme Traffic Signal Co..The traffic lights paired “Stop” and “Go” semaphore arms with small red and green lights. Bells played the role of today’s amber or yellow lights, ringing when the flags changed—a process that took five seconds. The Acme semaphore traffic lights were often used in Warner Bros. Looney Tunes and Merrie Melodies cartoons for comedic effect due to their loud bell which was often followed by screeching tires and many sight gags.