Martin, that is indeed a poling car and it is used for moving cars on the track adjacent to the one the locomotive is on. The white pole is supported at a height that matches up with poling pockets on the car ends and it is pivoted in the middle so that it can pull or push a car on the next track. Using a poling car was much less dangerous than having a brakeman hold a loose pole in between the loco and car. PRR had quite a few of them back in the day.
Excellent! There are so very few photos of anything but engines for the CVRR that anything else in a photo is something rather special.
I would not have thought that the pivot for a pole in the middle of the car would have been strong enough for this purpose, but then that's something I've learned now.
Ok it looks just like a PRR SA class poling car!
Now, I can actually build a model of this car.