Railroads have been essential to the growth of America for generations. Railroads are, first and foremost, a business. But what a business it has been and continues so strongly to be. Railroading is an enterprise of continental
scope and nearly two centuries of phenomenal impact on America's growth. As one might expect for such a saga, there were several "beginnings".

• Mot-clé
  HISTOIRE DES CHEMINS DE FER, EVOLUTION, TRAIN (TYPE DE), RESEAU FERROVIAIRE, HISTORIQUE, ETATS UNIS