Cementing its role in the North American supply chain, the value of intermodal transport speaks for itself with another year of solid growth. Building on the industry's positive 2012 performance, total shipments improved 4.6 percent in 2013, according to the Intermodal Association of North America's (IANA) fourth quarter and year-end Intermodal Market Trends & Statistics. Domestic container volume "” which doubled over the past 10 years "” outperformed other markets in 2013, capping the year with a 9.4 percent bump, which was consistent with Q4 growth of this segment at 9.0 percent.