Got alerted to this via ITE (I apologize if someone posted this earlier): Facebook group devoted to old NYC two-section traffic signals (https://www.facebook.com/RememberThoseTwoSectionTrafficSignalsInNewYorkCity). It's got a nice collection of older photos.
Interesting to see that this has been mentioned here on the forum.
I am the founder of "Remember those two-section traffic signals in New York City?" It is a great page to step back in time and see the old traffic signals that were once in service throughout the five boroughs. I have come across many interesting photographs since I first established the page, and it is nice to know that many people enjoy it.
Spread the word to others (if interested). Thank you.