Traffic was up 5.8% in the US, 13.2% higher in Canada and 31% lower in Mexico.
Combined year-to-date pulp and paper volume at 331,558 carloads was off 0.3% from the same 36 week period of 2009, AAR showed.
North American lumber and wood products volume for the week at 3,777 carloads was up 1.3% and year-to-date at 171,095 carloads was 8.6% higher.
Primary forest products shipments were down 4.2% and up 7.3% respectively.
Total North American rail traffic for the week was 7% higher to 362,957 carloads and through 36 weeks was up 9.9% to 13.32 million carloads.
RailAmerica reported its August pulp and paper rail freight was 9.3% higher to 5,448 carloads while forest products volume was down 5.8% to 3,837 carloads. Genesee & Wyoming reported August pulp and paper freight was 10% higher to 7,947 carloads while lumber and forest products was 4.8% lower to 5,574 carloads, the lone commodity group to show a decline in the period.