My Green Steam Products partner, Dave, informed me that one of the last bastions of operating
semaphore signals in the US is just off the interstate near a town called Wagon Mound, NM
between the Colorado border and Albuquerque. As a railroad-signaling enthusiast, I'm always
looking for new and interesting signals perched next to the track when I railfan.
Here is a picture of one of several Signals I saw near Wagon Mound, NM.

Photo taken by member Mike Bruno.