The traffic signal system plays a crucial role in regulating the flow of vehicles and pedestrians on the road, ensuring safety and efficiency. The concept of the traffic signal was developed by Garrett Morgan, an African American inventor, and entrepreneur.

Garrett Morgan patented his design for the first three-position traffic signal in 1923. His traffic signal included a warning light to alert drivers before the changing signal, improving safety at intersections. Morgan's innovation was a significant contribution to transportation safety and management, revolutionizing the way traffic was controlled throughout cities.

Despite facing discrimination and racial barriers during his lifetime, Garrett Morgan's invention of the traffic signal has had a lasting impact on society and continues to save lives on roads worldwide. His pioneering work in this field is an important part of Black history and the history of transportation technology.