Historical Marker
Ceremonial Places
Historical marker location:
16062 OH-104, Chillicothe, Ohio
( Marker is on Ohio Route 104, 0.3 miles north of Moundsville Road, on the right when traveling north.)
Hopewell Culture National Historical Park.
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.