All the railroad does is haul it around and do the kind of routine inspection that every car on every train receives. Next time you're stuck at a railroad crossing, pak, read the lettering on the car carefully. It will tell you who owns it (not the railroad, unless it's hauling the railroad's diesel fuel). It will tell you where the car is to be sent for maintenance, and likely where for loading and unloading. If the car does not meet certain government standards it is "bad ordered." The railroad won't haul it, and it's the owning company's responsibility to fix or replace it.
Schultzy @ http://www.remeorealty.com/