Truck Profile

KEY: N = data do not exist; NA = not applicable; R = revised; U = data are not available.

^aTruck transportation (NAICS 484) - Industries primarily engaged in over-the-road transportation of cargo using motor vehicles, truck-tractors, and trailers.

Couriers and messengers (NAICS 492) - Establishments primarily engaged in providing air, surface, or combined courier delivery services of parcels or primarily engaged in furnishing local messenger and delivery services of small items within a single metropolitan area...

Automobile Profile

KEY: N = data do not exist; R = revised; U = data are  not available.

^a  Figures obtained by addition / subtraction and may not appear directly in data source.

^b  Urban consists of travel on all roads and streets in urban places of 5,000 or greater population.

^c  1960-90 includes Motorcycle data.

^d  Involvement only with motor vehicle.

^e  1960 included in Single-unit 2-axle 6-tire or more truck in Truck Profile.

^f  1960-90...

General Aviation Profile

KEY:  N = data do not exist; NA = not applicable; R = revised; 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...

Air Carrier Profile

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...

Roadway Vehicle-Miles Traveled (VMT) and VMT per Lane-Mile by Functional Class

^a Includes the 50 States and the District of Columbia.

^bUrban other arterial includes other freeways and expressways, other principal arterial, and minor arterial. Rural other arterial includes other principal arterial and minor arterial prior to 2009, and includes other freeways and expressways, other principal arterial and minor arterial for 2009.

^cCollector is the sum of major and minor collectors.

U.S. Flag Vessels by Type and Age

^a Age is based on the year the vessel was built or rebuilt.

^b In 1992, Offshore support boats were designated as crew boats.

^c In 1992, Tank barges were designated as Liquid barges.

Class I Railroad Locomotive Fleet by Year Built

^a Disregards year of rebuilding.

Condition of Rail Transit Infrastructure

KEY: N = data do not exist; R = revised.

Condition of Urban Bus and Rail Transit Maintenance Facilities

KEY: N = data do not exist.

^a These data are derived from the Transit Economic Requirements Model (TERM). TERM uses statistically determined decay curves to simulate the deterioration of the Nation's transit vehicles, facilities, and other infrastructure components.  National Transit Database (NTD) data are applied to these decay curves to estimate conditions.  Only the condition of directly operated facilities are provided for 1995, 1997 and 2000.  The NTD began gathering information on facilities owned by bus systems...

Average Age of Urban Transit Vehicles

KEY: N = data do not exist; R = revised.

^a Locomotives used in Amtrak intercity passenger services are not included.

^bFull-size buses have more than 35 seats; Mid-size buses have 25-35 seats; Small buses have fewer than 25 seats.