Table C-12,,, U.S. Merchandise Imports from Canada and Mexico by Mode: 2001,,, Total NAFTA Imports,,, Mode,"Value (U.S. million $)","Weight (short tons)","Value to weight ratio" Truck,"203,507","91,639,312","2,221" Rail,"69,255","75,032,793",923 Pipeline,"25,910","75,399,107",344 Air,"15,127","138,614","109,131" Water,"20,551","156,777,660",131 Other and unknown,"14,052","443,131","31,710" Total ,"348,402","399,430,616",872 Imports from Canada,,, Mode,"Value (U.S. million $)","Weight (short tons)","Value to weight ratio" Truck,"117,130","69,119,663","1,695" Rail,"47,198","66,631,589",708 Pipeline,"25,908","75,381,271",344 Air,"9,836","76,617","128,379" Water,"6,279","60,090,216",104 Other and unknown,"10,617","262,819","40,397" Total ,"216,969","271,562,176",799 Imports from Mexico,,, Mode,"Value (U.S. million $)","Weight (short tons)","Value to weight ratio" Truck,"86,377","22,519,649","3,836" Rail,"22,057","8,401,204","2,625" Pipeline,2,"17,836",91 Air,"5,291","61,996","85,345" Water,"14,272","96,687,444",148 Other and unknown,"3,435","180,311","19,049" Total ,"131,433","127,868,440","1,028" "NOTES: Other includes ""flyaway aircraft"" (i.e., aircraft moving from the manufacturer to a customer and not carrying any freight), vessels moving under their own power, pedestrians carrying freight, and miscellaneous. Shipments that neither originate nor terminate in the United States (i.e., in-transit shipments) are not included here, although they use the U.S. transportation system. These shipments are usually part of Mexico-Canada trade and simply pass through the United States. Merchandise trade data exclude export shipments valued at less than $2,500 and import shipments valued at less than $1,250. Individual modal totals may not sum to exact export or import totals due to rounding.",,, "SOURCES: U.S. Department of Transportation, Bureau of Transportation Statistics, special tabulation, May 2002; based on: total trade, air, and water—U.S. Department of Commerce, U.S. Census Bureau, Foreign Trade Division, FT920 U.S. Merchandise Trade (Washington, DC: 2001); all land modes—U.S. Department of Transportation, Bureau of Transportation Statistics, Transborder Surface Freight Data, January 2002.",,, ,,, ,,, ,,,