The off-road 25-ton DumpWagon is basically the back part of an articulated dump truck with a tongue on it. The company also says that a single DumpWagon with a 250-hp tractor is less expensive than the equivalent-sized self-propelled ADT. A bigger advantage is when they are pulled in trains of two or three and have 50- to 75-ton capacities. To unload trains, the operator simply makes a sharp U-turn, thereby positioning the rear tongues out of the path of the front DumpWagons.