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Interesting US History
A Website Devoted to Interesting Events in U.S. History

 

 
 

 

ON THIS DAY IN UNITED STATES HISTORY

August 5, 1914

The First Red-Green Traffic Light is Installed

On this day in 1914, the American Traffic Signal Company installed the first traffic light. It was installed in Cleveland, Ohio and consisted of a red light, green light, and a buzzer to signal impending color change.

The first four-way, three color light was not invented until 1920 but automatic interconnected traffic lights were not introduced until March of 1922 in Houston, Texas.