For those of you that are interested, then you're in for a treat. A while back, on YouTube, I came across a video that is solely made up of still pictures, in which they were taken in New York City in 1968. The video is about 25 minutes long, and the person that created this first starts at the Brooklyn Bridge, and then he enters lower Manhattan, in where he changes direction and walks north on Broadway. He eventually ends up in Central Park.
From 3:49 to around 10:01, each intersection on Broadway at this time had undeveloped signalized intersections, in which still used two-section traffic signals. Some of them from Ruleta, while others from Marbelite. You could also see some overlaps as well. It is interesting to see that these were still in service on that portion of Broadway, since other signalized intersections in the video were already upgraded to pedestrian signals and three-section traffic signals.
Aside from the traffic signals, you could also see some vintage N.Y.C. signage, such as the beige Manhattan porcelain street signs. Enjoy the video.