Intermodal rail volume for the week ended Dec. 7 rose 9.4% from the same period last year, the Association of American Railroads reported.
Traffic increased to 262,765 trailers and containers, AAR said in its weekly report.
Rail carload traffic declined 4.4% to 279,213 year-over-year, the rail trade group said.
Five of the 10 carload commodity groups tracked by AAR posted increases, led by petroleum and petroleum products, which rose 18.6% to 14,831 carloads. Commodities showing a decrease included coal, which fell 13.3%.
Year-to-date, U.S. railroads moved 12.1 million intermodal containers and trailers, up 4.4% from last year. Carload traffic dipped 0.6% to 13.8 million units.
Total North American rail volume year-to-date for the 13 reporting U.S., Canadian and Mexican railroads increased 0.3% from the same point last year to 18.4 million carloads.