Bruce Harmon/Trans PixsU.S. intermodal traffic rose 6.8% last week from the same week a year ago, the Association of American Railroads reported.
Container traffic for the week ended Saturday rose 9.6% to 217,444 units, while trailers fell 10.7% to 28,471 units.
Railroad carloads excluding intermodal rose 1.7% to 286,156 units, AAR said.
Railroad volume is considered an important economic indicator. Intermodal traffic, which tends to be higher-valued merchandise than bulk commodities, uses trains for the long haul and trucks for the shorter distance at either end of the trip.