Table 1-11: Number of U.S. Aircraft, Vehicles, Vessels, and Other Conveyances

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KEY: U = data are unavailable; R = revised.

^a Air carrier aircraft are those carrying passengers or cargo for hire under 14 CFR 121 and 14 CFR 135. Beginning in 1990, the number of aircraft is the monthly average of the number of aircraft reported in use for the last three months of the year. Prior to 1990, it was the number of aircraft reported in use during December of a given year.
^b 1991-94 data revised to reflect changes in adjustment for nonresponse bias with 1996 telephone survey factors; 1995-97 data may not be comparable to 1994 and earlier years due to changes in methodology. Includes air taxi aircraft.
^c In 1960, this category includes all trucks and other 2-axle 4-tire vehicles.
^d Prior to 1984, excludes most rural and smaller systems funded via Sections 18 and 16(b)(2), Urban Mass Transportation Act of 1964, as amended. Also prior to 1984, includes total vehicles owned and leased.
^e Other includes aerial tramway, automated guideway transit, cable car, ferry boat, inclined plane, monorail, and vanpool.
^f Nonself-propelled vessels include dry-cargo barges, tank barges, and railroad-car floats.
^g Self-propelled vessels include dry-cargo and/or passenger, offshore supply vessels, railroad-car ferries, tankers, and towboats.
^h 1960 - 2005 includes private and government owned vessels of 1,000 gross tons and over. Beginning in 2006, data are reported only for privately-owned vessels of 1,000 gross tons and over.
ⁱ Recreational vessels that are required to be numbered in accordance with Chapter 123 of Title 46 U.S.C.
^j All trucks.
^k Data for Jan. 1, 1991-June 30, 1991 included in 1990 figure.

NOTES:
Transit motor bus figure is also included as part of bus in the highway category.
Transit data for Bus, Para transit, and other are not continuous from 2006 to 2007. Data for other modes and national aggregates are continuous from 2006 to 2007. Bus and Para transit in these tables refer to a mode of service, not to a specific vehicle type. Para transit service, defined as roadway service directly from an origin to a destination determined by the rider and not following a fixed-route, is usually provided by vans, small buses and in a limited number of cases by large buses. Bus service is a variety of roadway services that share the characteristic of being entirely or partially fixed routes. Bus service includes local service, express service, subscription service, diversionary route service, loop service, and other types. Although bus service is normally provided by buses, it can be provided by smaller vehicles that may be considered large vans.
For more detail on oceangoing vessels, see table 1-23.

SOURCES:
Air:
Air carrier:
1960-65: U.S. Department of Transportation, Federal Aviation Administration, FAA Statistical Handbook of Aviation, 1970 (Washington, DC: 1970), table 5.3.
1970-75: Ibid., 1979 edition (Washington, DC: 1979), table 5.1.
1980-85: Ibid., Calendar Year 1986 (Washington, DC: 1986), table 5.1.
1990-94: Ibid., Calendar Year 1997 (Washington, DC: unpublished), table 5.1, personal communication, Mar. 19, 1999.
1995-2005: Aerospace Industries Association, Aerospace Facts and Figures 2005/6 (Washington, DC: 2006), p. 90 and similar tables in earlier editions.
General aviation:
1960-65: U.S. Department of Transportation, Federal Aviation Administration, FAA Statistical Handbook of Aviation, 1969 (Washington, DC: 1969), table 9.10.
1970-75: Ibid., Calendar Year 1976 (Washington, DC: 1976), table 8-6.
1980: Ibid., General Aviation Activity Survey, Calendar Year 1980 (Washington, DC: 1981), table 1-3.
1985: Ibid., Calendar Year 1985 (Washington, DC: 1987), table 2-9.
1990-2007: Ibid., General Aviation and Air Taxi Activity Survey (Annual Issues), table 1.2, available at http://www.faa.gov/data_research/aviation_data_statistics/ as of June 15, 2009.
Highway:
Passenger car:
1960-94: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics Summary to 1995, FHWA-PL-97-009 (Washington, DC: July 1997), table MV-201.
1995-2007: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1, available at http://www.fhwa.dot.gov/policy/ohpi/hss/hsspubs.cfm as of June 16, 2009.
Motorcycle:
1960-94: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics Summary to 1995, FHWA-PL-97-009 (Washington, DC: July 1997), table MV-201.
1995-2007: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1, available at http://www.fhwa.dot.gov/policy/ohpi/hss/hsspubs.cfm as of June 16, 2009.
Other 2-axle 4-tire vehicles:
1970-94: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics Summary to 1995, FHWA-PL-97-009 (Washington, DC: July 1997), table VM-201A.
1995-2007: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1, available at http://www.fhwa.dot.gov/policy/ohpi/hss/hsspubs.cfm as of June 16, 2009.
Single-unit and combination trucks, and buses:
1960-94: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics Summary to 1995, FHWA-PL-97-009 (Washington, DC: July 1997), table VM-201A.
1995-2007: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1, available at http://www.fhwa.dot.gov/policy/ohpi/hss/hsspubs.cfm as of June 16, 2009.
Transit:
1960-2007: American Public Transit Association, Public Transportation Fact Book (Washington, DC: 2009), table 17.
Rail (all categories, except Amtrak):
1960-2007: Association of American Railroads, Railroad Facts (Washington, DC: Annual Issues), pgs. 52 and 69.
Amtrak:
Passenger train-cars and locomotives:
1975-80: Amtrak, State and Local Affairs Department, personal communication.
1985-2000: Ibid., Amtrak Annual Report, Statistical Appendix (Washington, DC: Annual Issues), p. 47.
2001-07: Association of American Railroads, Railroad Facts (Washington, DC: Annual Issues), p. 77 and similar tables in earlier editions.
Water transportation:
Nonself-propelled vessels and self-propelled vessels:
1960-2007: U.S. Army, Corps of Engineers, Waterborne Transportation Lines of The United States, Volume 1, National Summaries (New Orleans, LA : Annual Issues), table 1.
Oceangoing steam motor ships:
1960-2003: U.S. Department of Transportation, Maritime Administration, U.S. Flag Merchant Fleet, Calendar Years 2003 through 1946 (Washington, DC: 2004), available at http://www.marad.dot.gov/ as of Dec. 27, 2005.
2004: Ibid., Top 20 Merchant Fleet of the World (Washington, DC: 2004), available at http://www.marad.dot.gov/ as of Dec. 27, 2005.
2005: lbid., personal communication September 2008
2006-07: U.S. Department of Transportation, Maritime Administration, personal communication June 30, 2009.
Recreational boats:
1960-2007: U.S. Department of Transportation, U.S. Coast Guard, Boating Statistics (Washington, DC: Annual issues), available at http://www.uscgboating.org/statistics/stats.htm as of June 17, 2009.