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Container traffic increased 1.3% to 200,077 units, but trailer traffic dropped 2.2%, to 32,104 units.

Railroad carloads excluding intermodal rose 1.4% for the week ended Saturday, to 291,909 units, 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 long haul and trucks for the shorter distance at either end of the trip.