The stop light was invented by Garrett Morgan in 1923.
The development of the modern traffic light is credited to several inventors. The first known traffic signal was invented by Garrett Morgan, an African American inventor, in 1923. It was a three-position, manually operated traffic control device. However, the traffic light as we know it today, with red, yellow, and green lights, was developed by an American police officer named William Potts in 1920. Potts designed a manually operated signal with three colors for the Detroit Police Department. Over the years, several improvements were made to traffic lights, including the addition of timers and automatic control systems.
