Yellow Traffic Signals with Black Backplates 1950's

[Treliazz]

I know Tucson AZ was using these type of lights in the 50's, but is there other states that use these lights in the 50's?

[Rick1962]

Tulsa has used yellow signals since the late '40s or so. The city began using backplates in the mid-'50s. These were typically made in-house out of a thick rubber-like material, sometimes with clipped corners, rather than radiused.

The city switched to a somewhat thinner material in the mid-'70s, finally stating to use manufacurer-supplied backplates in the late '80s.

There are still some signals around town with the home-made backplates, usually on the few remaining city-fabricated truss-arm installations.

SM-T580

[jakeroot]

We already had a topic on this...that you started:

https://www.aaroads.com/forum/index.php?topic=21935.0

[Treliazz]

Is Witcha Falls TX is the only place that used Yellow Econolite Bull's-eye Signals with Black Backplates in the 1950's and 60's?