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KEY: N = data do not exist; NA = not applicable; U = data are not available.
a In 1960, 1970, 1980, classified as Industrial.
b Includes Air tours done under 14 CFR 135: Air taxi operators and commercial operators.
c Includes Sightseeing done under 14 CFR 91: general operating and flight rules.
d The significant decrease in Other for 1990 and later can be attributed to a redefinition of the category to only include aerial other, general aviation other, and...
KEY: N = data does not exist; R = revised; U = data is not available.
a Some totals include data not in the table; thus totals may not equal sum of table data.
b Includes scheduled and nonscheduled (charter) operators. By Sec. 2 of the Airline Deregulation Act of 1978 "charter air carrier" and "charter air transportation" replaced supplemental air carriers and supplemental air transportation, which were formerly Sec. 101(36) and (37) of the Act. The 24 pre-deregulation supplemental carriers now have scheduled...
KEY: KWH = Kilowatt hour; N = data do not exist.
a Before 2002, Other major fuels includes liquefied petroleum gas, methanol, ethanol, and bunker fuel. From 2002 - 13, Other major fuels includes liquefied petroleum gas, methanol, ethanol, bunker fuel, kerosene, and grain additive. After 2013, other major fuels includes liquefied petroleum gas, ethanol and hydrogen.
bPower includes electric propulsion and electric battery.
KEY: CAFE = Corporate Average Fuel Economy; GVWR = gross vehicle weight rating; kmpl = kilometers per liter; R = revised; U = data are not available.
a Data from 2007 were calculated using a new methodology developed by FHWA. Data for these years are based on new categories and are not comparable to previous years. The new category Light duty vehicle, short wheel base replaces the old category Passenger car and includes passenger cars, light trucks, vans and sport utility vehicles with a wheelbase (WB) equal to or less than 121 inches. The...
KEY: R = revised.
a U.S. owned carriers only. Operations of foreign-owned carriers in or out of the United States not included.
KEY: R= revised; U = data are not available.
a Incudes Freight, Express, and Mail.
b Estimates from 1980 to 1989 come from the Association of American Railroads using ton mile values from the Surface Transportation Board’s Waybill Sample. The Waybill Sample represents all major U.S. railroads, including all Class I railroads and several short-line railroads.
c Foreign water traffic is only measured for their travel on U.S. waterways, based on distance from coastal entrance channels to ports and...
a The 2014 and 2023 totals for the top 50 airports may not sum from the individual airports because some top 50 airports in 2021 were not in the top 50 in earlier years.
b All U.S. airports consists of 1,274 airports as of 2024 and includes Puerto Rico, U.S. Virgin Islands and U.S. Pacific Trust Territories and Possessions.
KEY: NA = not applicable.
a From 2004 onward, the Carpool categories are 2-person and 3+ person; 4+ person is the sum of 4-person, 5-6 persons, and 7+ persons from the source data.
bPublic transportation refers to bus, streetcar, subway, railroad, and elevated trains for years 1989-2001, and includes ferryboats from 2002-14.
c From 1989 to 2001, Bicycle data are included under Motorcycle.
d Other means include ferryboats, surface trains, and van...
KEY: N = data do not exist; R = revised; U = data are not available.
a Data from 2007 were calculated using a new methodology developed by FHWA. Data for these years are based on new categories and are not comparable to previous years. The new category Light duty vehicle, short wheel base replaces the old category Passenger car and includes passenger cars, light trucks, vans and sport utility vehicles with a wheelbase (WB) equal to or less than 121 inches. The new category Light duty vehicle, long wheel base replaces Other 2-axle,...
KEY: N = data do not exist; R = revised.
a Other vessels include commercial vessels, fishing boats, freight barges, freight ships, industrial vessels, oil recovery vessels, passenger vessels, unclassified public vessels, recreational boats, research vessels, school ships, tow and tug boats, mobile offshore drilling units, offshore supply vessels, publicly owned tank and freight ships, as well as vessels not fitting any particular class (unclassified).
bOther nonvessel sources include deepwater ports, designated...