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Trucking moved two-thirds of U.S. domestic freight in terms of tonnage and three-fourths of freight in terms of value in 2021. Pipeline, rail, and water modes typically move heavy bulk commodities and thus have greater shares of freight by tonnage than by value. Higher value commodities typically move by air and multiple modes & mail, making up a greater share of freight by value than by tonnage.

U.S. Domestic Freight Tonnage by Mode, 2021

Notes: “Air” includes shipments moved by air or a combination of truck and air in commercial or private aircraft. “Other and unknown” includes movements not elsewhere classified such as flyaway aircraft, and shipments for which the mode cannot be determined. Contains only shipments associated with domestic freight moved between domestic origins and domestic destinations.

Source: U.S. Department of Transportation, Bureau of Transportation Statistics and Federal Highway Administration, Freight Analysis Framework Version 5.5, Data Tabulation Tool, queried May 30, 2023.