JACKSONVILLE, Fla. (AP) â¿¿ RailAmerica's total freight carloads increased 8 percent for May. The Jacksonville, Fla., company said Tuesday that its total freight carloads for the month that ended May 31 increased to 75,384, from 69,776 in May of last year. It increased shipments in eight out of 12 commodity groups during the month. The biggest gains were in coal, forest products and motor vehicle shipments and the largest declines were in metallic ores and metals as well as pulp, paper and allied products. The results include a boost from recent acquisitions. The company bought three railroads in Alabama last year, which added 2,194 carloads to its May shipments this year. Shares of the RailAmerica Inc., which owns and operates 45 railroads across North America, fell 4 cents to $22.75 in midday trading.