Intermodal volume increased 9% year-over-year in Q1 2011 as international volume grew for the fifth straight quarter, posting a solid 9.6% uptick, according to a report released May 12 by the Intermodal Association of North America (IANA). IANA’s Intermodal Market Trends & Statistics report also notes that overall domestic intermodal volume also increased during the quarter by 8.4%.