The growth in oil-train shipments fueled by the U.S. energy boom has stalled in recent months, dampened by safety problems and low crude prices . The number of train cars carrying crude and other petroleum products peaked last fall, according to data from the Association of American Railroads, and began edging down. In March, oil-train traffic was down 7% on a year-over-year basis. Railroads have been a major beneficiary of the U.S. energy boom, as oil companies turned to trains to move crude to refineries from remote oil fields in North Dakota and other areas not served by pipelines. Rail shipments of oil have expanded from 20 million barrels in 2010 to just under 374 million barrels last year, according to the U.S. Energy Information Administration. About 1.38 million barrels a […]