Condition of U.S. Highway Bridges

KEY: SqM = square meters.

Average Age of Automobiles and Trucks in Operation in the United States

KEY: RV = recreational vehicle; U = data are not available.

^a The 1969, 1977, 1983, and 1990 surveys do not include a separate category for sports utility vehicles (SUV), while the 1995, 2001, 2009 and 2017 surveys do. In 1990, most SUVs were classified as automobiles.

U.S. Airport Runway Pavement Conditions

KEY: NPIAS = National Plan of Integrated Airport Systems.

^a The U.S. Department of Transportation, Federal Aviation Administration's (FAA's) National Plan of Integrated Airport Systems is composed of all commercial service airports, all reliever airports, and selected general aviation airports. It does not include over 1,000 publicly owned public-use landing areas, privately owned public-use airports, and other civil landing areas not open to the general public. NPIAS airports account for almost all enplanements. In 2005, there were approximately 16,500 non-NPIAS...

Number of Trucks by Weight

KEY: lb = pound.

Active U.S. Air Carrier and General Aviation Fleet by Type of Aircraft

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

^a Air carrier aircraft are aircraft carrying passengers or cargo for hire under 14 CFR 121 (large aircraft-more than 30 seats) and 14 CFR 135 (small aircraft-30 seats or less). This definition is more encompassing than that in the Federal Aviation Administration (FAA) Aviation Forecast- jet aircraft, 60 seats or more carrying passengers or cargo for hire. Beginning in 1990, the number of aircraft is the monthly average reported in use for the last three months of the...

ADA Lift- or Ramp-Equipped Transit Buses

KEY:  ADA = Americans with Disabilities Act of 1992; N = data do not exist.

^a From 2012 includes articulated bus, bus, double decker bus, over-the-road bus, school bus, trolleybus and vintage trolley.

Estimated U.S. Roadway Lane-Miles by Functional System

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

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

^cCollector is the sum of major and minor collectors. 

Top 15 Cruise Ship Ports by Port of Departure

1 Data for 2010 are based on the top 15 cruise ship ports in that year.

Number of Stations Served by Amtrak and Rail Transit, Fiscal Year

KEY: U = data are not available.

U.S. Oil and Gas Pipeline Mileage

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

^a Excludes service pipeline. Data are not adjusted to common diameter equivalent. Mileage as of the end of each year.

^b Before 1985, data include field line mileage.

^c The jump in 2022 data is due to the newly defined Type C regulated gas gathering lines, as defined by PHMSA here: https://www.phmsa.dot.gov/technical-resources/pipeline/gas-gathering/...