JACKSONVILLE, Fla., Sept. 12, 2012 /PRNewswire/ -- RailAmerica, Inc. (NYSE: RA) today reported that its total freight carloads for the month ended August 31, 2012 were 74,813, up 2.9% from 72,697 in August 2011.The Company increased shipments in August 2012 in six out of twelve commodity groups compared to August 2011. ¤The largest increases were in Other, Petroleum and Forest Products. ¤Other volumes were up in all regions. ¤The Other category includes crude oil, which accounted for a large portion of the increase from prior year. ¤Petroleum increased primarily due to higher shipments in the West and Midwest regions. ¤The Petroleum category includes refined petroleum products. ¤Forest... More...