Association of American Railroads
以下でアクセス： 27 12月, 2017
Rail Intermodal Keeps America Moving
Containers accounted for 44 percent of intermodal volume in 1990, 69 percent in 2000, and a record 91 percent in 2016. Unlike trailers, containers can be “double stacked,” sharply increasing productivity and helping to ensure that there is sufficient traffic density to keep rail intermodal cost competitive with alltruck movements. Containers can also be easily transferred to and from ships and trucks, further enhancing productivity.
Source: AAR analysis of 2014 STB Waybill Sample