Last Summer, I visited Central Park to see and photograph various two-section (red and green) signals, in which are still in useful service. Though solely red and green signal indications are no longer in existence for vehicular traffic, there are many heads throughout Central Park that serve as pedestrian signals. Many used to use "WAIT" and "WALK" signal indications, but a large percentage were retro-fitted with ordinary red and green lenses.
Below, are some pictures from my visit.
1950s head from Marbelite. Still continues to use lamps.
Newer pedestrian signal that uses L.E.D. signal indications. From T.C.T.
Another Marbelite pedestrian signal from the 1950s. This one, too, still uses lenses and lamps.
This one here is perhaps the oldest head in Central Park. Manufactured by the Ruleta Co., this pedestrian signal likely dates back to the 1930s, and it is still operable. The Ruleta Co. once manufactured vehicular signals for New York City in the early 20th century. Though all are long gone, this one still remains. It is likely the last of its kind in the entire city. Here are some pictures of it.
The Ruleta is still attached to its original Union Metal pole, and the original General Electric signal controller is still in use; however, it is dead. So, the signals are stuck on an interval. The Ruleta does not change from red to green because of this.
Another old G.E. signal controller unit is still in use in Central Park. Connected to the original U.M. decorative pole as well.
Other two-section were once retro-fitted with L.E.D. inserts over ten years ago, such as this one below.
Then there are some that have dead lamps. Some are partially illuminated, while others are totally dead.