Cora Gaines Carrel

Historical marker location:

1 E Spaulding St, Willoughby, Ohio

( Memorial is on East Spaulding Street east of Euclid Avenue (Ohio Route 20), on the right when traveling east.)

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.