Port of Tacoma, Wash.
U.S. intermodal traffic rose 2.5% last week over the same week a year ago, the Association of American Railroads reported.
Container traffic for the week ended Saturday rose 4.6% to 226,169 units, while trailers fell 10.3% to 31,056 units.
Railroad carloads, excluding intermodal, fell 5.3% to 295,243 units for the week, AAR said in its weekly report.
Railroad volume is considered an important economic indicator. Intermodal traffic, which tends to be higher-valued merchandise than bulk commodities, uses trains for the longhaul and trucks for the shorter distance at either end of the trip.