AdvertisementPipeline On Wheels: Trains Are Winning Big Off U.S. OilDecember 04, 2013Kirk SieglerfacebookEmailA train leaves the Rangeland Energy company's crude oil loading terminal near Epping, N.D. So far this year, 60 percent of all oil produced in North Dakota left the state by rail. One economist says there aren't enough oil tankers to fill the demand. (AP)