Table 9,,,,
"Number of Vehicles, Aircraft, Railcars, and Vessels",,,,
,1980,1990,2000,2002
Highway,,,,
"Truck, single-unit 2-axle 6-tire or more","4,373,784","4,486,981","5,926,030","5,650,619"
"Truck, combination","1,416,869","1,708,895","2,096,619","2,276,661"
"Truck, total","5,790,653","6,195,876","8,022,649","7,927,280"
Air,,,,
Air carriers,"3,808","6,083","8,055","8,194"
Rail,,,,
"Class I, locomotive","28,094","18,835","20,028","20,506"
"Class I, freight cars (1)","1,168,114","658,902","560,154","477,751"
Nonclass I freight cars (1),"102,161","103,527","132,448","130,590"
Railcar companies and shippers freight cars (1),"440,552","449,832","688,194","691,329"
Water ,"38,788","39,445","41,354","41,002"
Nonself-propelled vessels (2),"31,662","31,209","33,152","32,381"
Self-propelled vessels (3),"7,126","8,236","8,202","8,621"
Oceangoing steam and motor ships (4),864,636,454,426
"(1) Beginning with 2001 data, Canadian-owned U.S. railroads are excluded.  This accounted for about 47,000 cars in 2000.
(2) Nonself-propelled vessels include dry-cargo barges, tank barges, and railroad-car floats.
(3) Self-propelled vessels include dry cargo, passenger, off-shore support, tankers, and towboats.
(4) 1,000 gross tons and over.",,,,
"SOURCE:  Various sources, as cited in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 1-11, available at http://www.bts.gov. ",,,,