The traffic light, as we know it today, was invented by Garrett Morgan, an African American inventor, entrepreneur, and political leader. In 1923, Morgan patented his invention of the three-position traffic signal, which was eventually adopted and widely used to improve road safety and regulate traffic flow in cities across the United States.

Morgan's contribution to modern transportation infrastructure was significant, as his invention helped prevent accidents at busy intersections, reduce traffic congestion, and improve the overall safety of urban transportation systems. His innovative traffic signal design included a warning light to alert drivers that the signal was about to change, which became a standard feature in traffic lights worldwide.

Garrett Morgan's work as an inventor and entrepreneur paved the way for other African Americans to make important contributions to technology and engineering. His legacy continues to inspire future generations of inventors and innovators in the field of transportation and beyond.