Freight railroads saw shipments of crude oil increase 256% in 2012 over the 2011 level. As a percentage of commodities shipped, crude rose from 0.2% in 2011 to 0.8% in 2012, according to AAR. Meanwhile, weekly rail car and intermodal remain mixed. Freight carload traffic of U.S. railroads dropped 1.2% in the week ending Feb. 16 year-on-year, but intermodal continued its growth streak at 13.6%. Crude oil shipments rose 56.1% in the same period, AAR noted.