Historical Marker
Xavier University Armory
Historical marker location:
3842 Winding Way, Cincinnati, Ohio
( Marker is at the intersection of Winding Way and Marion Avenue, on the right when traveling north on Winding Way.)
Marker installed: 2019
The first traffic light in the world was installed in Cleveland, Ohio, in 1914. It had only two colors, red and green, and was manually operated by a police officer.