How Traffic Lights Work (1937)

By Kasia Cieplak-Mayr von Baldegg

Seeing Green, a short film by Chevrolet, celebrates the many kinds of traffic lights that were in operation in the 1930s and explains the mechanics of coordinating lights across a city. 

To watch this film in its entirety, visit the Prelinger Archive.

This article available online at:

http://www.theatlantic.com/video/archive/2011/09/how-traffic-lights-work-1937/245946/