A similar multi-wheeled, self-propelled hydraulic machine effortlessly moved NC&StL 4-8-4 #576 from its former location in Centennial Park here in Nashville, TN to the nearest railhead. It was remote controlled by an operator that walked slowly behind the unit for at least a mile. TRAINS staff filmed the move and it is probably on their website. Amazing technology! I watched it in real time on a local news channel.