rolling stock

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The equipment available for use as transportation, as automotive vehicles, locomotives, or railroad cars, owned by a particular company or carrier.

from The Century Dictionary.

• noun In railways, the cars, locomotive engines, etc. Also called rolling-plant.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun rail transport collective term for all vehicles that move on a railway, powered or unpowered.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun collection of wheeled vehicles owned by a railroad or motor carrier