The invention of the traffic signal by Garrett Morgan, an African-American inventor, has had a significant impact on transportation and road safety. In 1923, Morgan patented the three-position traffic signal, which featured a "yield" position to help regulate traffic flow. This innovation was a major breakthrough in improving road safety and managing traffic in urban areas.

Morgan's traffic signal design was eventually adopted and adapted by cities around the world, leading to the development of modern traffic signal systems. His invention played a crucial role in reducing traffic accidents and congestion, making roads safer for all users.

Garrett Morgan's contributions to traffic safety and management highlight the importance of recognizing and celebrating the achievements of African-American inventors and innovators in shaping our world today.