Table 2 Shipment Characteristics by Total Modal Activity for the United States: 2012
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Estimates are based on preliminary data from the 2012 Commodity Flow Survey. Because of rounding, estimates may not be additive
Mode of transportation (1)2012 Ton–miles (2)(millions)Ton-miles (Percent of Total)2012 Average miles per shipmentTon-miles CV (3)Standard Error for Ton-...