Grootspoor Spoorwegfabrikanten USA Hedendaagse Spoorwegfabrikanten: National Railway Equipment - Progress Rail Services - Railpower Technologies Corp. - Wabtec Corporation - Historische Spoorwegfabrikanten: Altoona Works - American Locomotive Company (ALCO) - American Car and Foundry Company - Baldwin Locomotive Works - Budd Company - Canadian Locomotive Company - GE Transportation - Lima Locomotive Works - Montreal Locomotive Works - MotivePower, Inc -Pullman Company - Standard Steel Car Company - Westinghouse