Historical Marker
Union County, Ohio / Union County Courthouse
Historical marker location:
215 West 5th St., Marysville, Ohio
( Marker is at the intersection of West 5th St. and Court Street, on the right when traveling east on West 5th St..)
Marker installed: 2013
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.