FIGURE 4-5a U.S. International Merchandise Trade Value by Transportation Mode: 2012
| Mode | Billions of U.S. Dollars | ||
|---|---|---|---|
| Total trade | Exports | Imports | |
| Water | 1,782 | 592 | 1,190 |
| Air | 927 | 427 | 500 |
| Truck | 665 | 343 | 321 |
| Rail | 168 | 61 | 107 |
| Pipeline | 77 | 9 | 68 |
| Other/unknown | 203 | 115 | 88 |
| Total, all modes | 3,822 | 1,547 | 2,275 |
FIGURE 4-5b U.S. International Merchandise Trade Weight by Transportation Mode: 2012
| Millions of Short Tons | |||
|---|---|---|---|
| Total trade | Exports | Imports | |
| Water | 1,425 | 631 | 793 |
| Air | 8 | 4 | 4 |
| Truck | 196 | 105 | 91 |
| Rail | 154 | 72 | 82 |
| Pipeline | 136 | 24 | 112 |
| Other/unknown | 21 | 8 | 13 |
| Total, all modes | 1,939 | 844 | 1,095 |
NOTES: 1 short ton = 2,000 pounds. The U.S. Department of Transportation (USDOT), Bureau of Transportation Statistics estimated 2012 weight data for truck, rail, pipeline, and other and unknown modes using value-to-weight ratios derived from imported commodities. Totals for the most recent year differ slightly from the USDOT, Federal Highway Administration, Office of Freight Management and Operations, Freight Analysis Framework (FAF) due to variations in coverage and FAF conversion of values to constant dollars. Numbers may not add to totals due to rounding.
SOURCES: Total, water and air data: U.S. Department of Commerce, U.S. Census Bureau, Foreign Trade Division, FT920 - U.S. Merchandise Trade: Selected Highlights (Washington, DC: February 2013). Truck, rail, pipeline, and other and unknown data: U.S. Department of Transportation, Bureau of Transporation Statistics, North American Transborder Freight Data, available at www.bts.gov/transborder as of October 2013.