Which inventor is credited with developing the first four-sided traffic signal incorporating the three colors: red, amber, and green?
Answer
William L. Potts
Detroit police officer William L. Potts developed the first three-color system (red, amber, green), introducing the yellow light to signal an impending change in October 1920.
Related Questions
Who is credited with inventing the pedestrian crosswalk concept, despite never learning to drive a car?In what US city and year was the widely regarded first electric traffic signal installed?Which inventor is credited with developing the first four-sided traffic signal incorporating the three colors: red, amber, and green?What crucial feature did Garrett Morgan's mechanized traffic signal patent of 1923 include that enhanced pedestrian safety?What was the primary limitation of the early acoustic signals installed for the blind in the 1920s?In which English town was the world's first official crosswalk marked with stripes, known as the zebra crossing, installed?What specific element did Dr. John Harriss's experimental signal in New York City feature, leading to a system where pedestrians could cross diagonally?Which location is cited as the earliest reference found for pedestrian signals displaying the alternating dual words 'Wait' and 'Walk'?What was the key difference between the early acoustic signals for the blind and the 1939 'Walk/Don't Walk' neon signs for the general public?What price did General Electric pay to purchase Garrett Morgan's patent for the mechanized traffic signal?What advancement, originating in France in 1993, solved the location problem inherent in push-button accessible pedestrian signals?