# Traffic Light

*The traffic signal is a classic case where Black invention was narrowed by official credit while the practical problem-solving stayed visible in public life.*

> Black's Encyclopedia — the sourced record of Black American life.
> Portal: Science & Invention · Status: In review · Revised: July 22, 2026 · Revisions: 1
> Canonical: https://www.blacksencyclopedia.com/record/traffic-light-9d66

## Questions this record answers

- Did Garrett Morgan invent the traffic light?
- Who invented the modern traffic signal?
- What part of the traffic-light history belongs to Black inventors?

## Summary

The traffic light was transformed by Garrett Morgan’s safety signal, a design that improved how intersections could be controlled and made safer for the public.

## The archive's standing

This is a major Black invention story because it shows practical intelligence applied to an everyday civic problem. The archive does not need to inflate the claim to honor it: Morgan did not create every traffic signal ever used, but he made a decisive improvement to traffic control. That is enough to place him among the builders of modern urban life.

## What Morgan built

Garrett Morgan’s 1923 safety signal introduced a three-position traffic-control device that added an intermediate warning step between stop and go. That design addressed the danger of abrupt signal changes and made intersection control safer and more orderly.

## Why the record matters

The standard story often compresses the traffic light into a generic municipal invention, which hides the role of Black inventors in solving everyday urban problems. Morgan’s work belongs in the ordinary history of roads, cities, and public safety, where Black authorship has often been left out of the headline version.

## What the archive holds

The right record is specific: Morgan improved traffic control with a patented safety signal, and that contribution shaped later traffic management. The claim is strongest when it is precise, because precision protects the invention from both erasure and exaggeration.

## Sources

1. Garrett A. Morgan, U.S. Patent No. 1,475,024, "Traffic Signal," issued November 20, 1923.
2. Raymond A. Winbush, "The Life and Inventions of Garrett A. Morgan," in Black Inventors, Craftsmen, and Entrepreneurs, edited by James Ingram, 2nd ed., National Library Service, 1997.

## Related records

- https://www.blacksencyclopedia.com/record/garrett-morgan
- https://www.blacksencyclopedia.com/record/u-s-traffic-signal
- https://www.blacksencyclopedia.com/record/automatic-elevator-door
- https://www.blacksencyclopedia.com/record/american-policing
- https://www.blacksencyclopedia.com/record/gasoline-service-station

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Cite as: Black's Encyclopedia, "Traffic Light," revised July 22, 2026. https://www.blacksencyclopedia.com/record/traffic-light-9d66

Text under the Black's Record License: cite the record, keep attribution attached, cite the revision date.