Weekly intermodal volume increased by 1.1% for the week ended Saturday from a year ago, the Association of American Railroads reported.
Traffic increased to 205,597 trailers and containers, AAR said in its weekly report.
Rail carload traffic rose 2% to 247,896 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 36.3%. Commodities showing a decrease included motor vehicles and parts, which fell 13.8%.
For the first 27 weeks of the year, U.S. railroads moved 6.5 million intermodal containers and trailers, up 3.6% from last year. Carload traffic dipped 1.4% to 7.5 million units.