I was at the F train stop near near Prospect Park in Brooklyn.
It had train wheels retrofitted to the undercarriage that connected a pressure wheel to the actual rubber of the normal drive wheels.
Is that a muffler from a retrofitted propane system?
There was a generator, and a remote controlled jack hammer, (both on there own mini train cars) all attached…
It looked pretty hokey to me, plus it would be horrible to have to drive it a job site in some random spot in the NYC subway system…