FIGURE 3. Modal Shares of U.S. Merchandise Trade Handled by Land, Water, and Air Gateways by Value and Weight: 20071

FIGURE 3. Modal Shares of U.S. Merchandise Trade Handled by Land, Water, and Air Gateways by Value and Weight: 20071

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(Percent)

  U.S. total land trade2 U.S. total water trade U.S. total air trade Other and unknown3
Value 24.1 44.9 25.1 5.9
Weight 22 77.7 0.4 0.1

NOTES: 1 BTS estimated the export weight for truck, rail, pipeline, and other and unknown based on value-to-weight ratios from the import data. This estimation procedure was used because U.S. exporters are not currently required to report the export weight for land modes. Weight for water and air exports and imports are from U.S. Department of Commerce, U.S. Census Bureau.

2 Includes truck, rail, and pipeline modes.

3 Includes purchased vehicles such as aircraft or boats moving from manufacturer to customer where the vehicle itself is the shipment, pedestrians carrying freight, and miscellaneous.

SOURCES: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, based on data from various sources. Value data-Water and air: U.S. Department of Commerce, U.S. Census Bureau, Foreign Trade Division, FT920 U.S. Merchandise Trade: Selected Highlights, December 2007, available at www.census.gov/foreign-trade/Press-Release/ft920_index.html as of October 2008. Truck, rail, pipeline, and other and unknown: USDOT, RITA, BTS, Transborder Freight Data, October 2008. Weight data-Water and air: U.S. Department of Commerce, U.S. Census Bureau, Foreign Trade Division, FT920 U.S. Merchandise Trade: Selected Highlights, December 2007, available at www.census.gov/foreign-trade/Press-Release/ft920_index.html as of October 2008. Truck, rail, pipeline, and other and unknown: USDOT, RITA, BTS, TransBorder Freight Data; and special calculation, October 2008.