In Grateful Remembrance

Historical marker location:

56998 OH-124, Portland, Ohio

( Marker can be reached from Ohio River Scenic Byway (Ohio Route 124) south of New Portland Road, on the right when traveling south.)

Marker installed: 1933

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.