Howland Springs

Historical marker location:

Warren, Ohio

( Marker is on Howland Springs Road SE, 0.2 miles east of Niles Corland Road SE (Ohio Route 46), on the right when traveling west.)

Marker installed: 2003

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.