Table 10,,,,
"Number of Aircraft, Railcars, Vehicles, and Vessels",,,,
Mode,1980,1990,2000,2003
Air carrier,"3,808","6,083","8,055","8,176"
General aviation,"211,045","198,000","217,533","209,708"
Automobiles,"121,600,843","133,700,496","133,621,420","135,669,897"
Motorcycles ,"5,693,940","4,259,462","4,346,068","5,370,035"
"Other 2-axle, 4-tire vehiclesa","27,875,934","48,274,555","79,084,979","87,031,553"
Trucks:,,,,
Single-unit,"4,373,784","4,486,981","5,926,030","5,666,933"
Combination,"1,416,869","1,708,895","2,096,619","2,245,085"
Busesb,"528,789","626,987","746,125","776,550"
Passenger rail: ,,,,
Amtrak—Cars,"2,128","1,863","1,894","1,623"
Locomotives,419,318,378,442
Commuter railcars and locomotives ,"4,500","R5,007","R5,498","P5,959"
Transitc,"10,654","11,332","12,168","P12,236"
Class I rail:,,,,
Freight cars,"1,168,114","658,902","560,154","467,063"
Locomotives,"28,094","18,835","20,028","20,774"
Other freight cars,"542,713","553,359","820,642","811,917"
"Nonself-propelled vessels (barges)d,e","31,662","31,209","33,152","31,335"
"Self-propelled vesselsd,e","7,126","8,236","8,202","8,648"
"Oceangoing shipse (1,000 gross tons and over)    ",864,636,454,412
Recreational boatsf,"8,577,857","10,996,253","12,782,143","12,794,616"
"a Includes vans, pickup trucks, sport utility vehicles, and other 2-axle, 4-tire motor vehicles that are not passenger cars.   ",,,,
"b Includes municipally owned transit and commercial, federal, and school buses.   ",,,,
c Includes light and heavy rail only.   ,,,,
d See Glossary for definitions.   ,,,,
e U.S.-flag vessels.   ,,,,
f Numbered boats. ,,,,
Key: P = preliminary; R = revised.,,,,
"Sources: Except as noted, 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, as of October 2005.",,,,
"2003 commuter railcars and locomotives, and transit: American Public Transportation Association, 2005 Public Transportation Fact Book, table 25, available at http://www.apta.com/research/stats/, as of October 2005.",,,,