Carmel, IN, United States
First Traffic Signal America's first automated electric traffic signal was installed at the intersection of Main and Range Line in 1923. Invented by Carmel resident Leslie Haines, the signal was authorized for placement here by town officials. Within only a few years such signals were placed at thou
sands of American intersections. Haines built the signals for 10 years at a small factory two blocks from here on First Ave., NW.
Listen to the audio guide for Brown plaque № 7440 Free on WIP — starts by itself when you arrive, even with the screen off