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KEY: N = data do not exist; R = revised.
a Country where passenger deboarded a direct flight from the United States.
b In March 2019, the U.S. State Department issued a travel advisory against Venezuela, due to Civil unrest. Subsequently, there have been no direct flights between the U.S. and Venezuela since then.
c The Netherlands Antilles was dissolved as of September 2010.
KEY: N = data do not exist; R = revised.
a Country where passenger boarded a direct flight to the United States.
b In March 2019, the U.S. State Department issued a travel advisory against Venezuela, due to Civil unrest. Subsequently, there have been no direct flights between the U.S. and Venezuela since then.
c The Netherlands Antilles was dissolved as of September 2010.
KEY: U = data are not available.
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/...
KEY: N = data do not exist.
a Includes the 50 states and the District of Columbia. When states did not submit reports, data was estimated by the U.S. Department of Transportation, Federal Highway Administration.
KEY: U = data are not available.
a Includes civil and joint-use civil-military airports, heliports, STOL (short takeoff and landing) ports, and seaplane bases in the United States and its territories. Sole-use military airports are included beginning in 2007.
bTotal airports in 2006 does not sum from Public and Private based on the source data.
c Total Landing Areas includes airports, heliports, seaplane bases, gliderports, balloonports, and ultralights.
dMilitary includes...
KEY: P = preliminary; R = revised; U = data are not available.
aSecurity Events include only those that meet a National Transit Database (NTD) major event reporting threshold (note: Some thresholds have changed through the years.). Please refer to the NTD Safety & Security Reporting Policy Manual available at https://www.transit.dot.gov/ntd/manuals for more information.
b The killing of one or more human beings by...
KEY: N = data do not exist; P = preliminary; U = data are not available.
a Starting in 2015, Rail Transit Incidents include all collisions, derailments, fires, security events, and not otherwise classified safety events meeting National Transit Database (NTD) reporting thresholds (note: Some thresholds have changed through the years.). Please refer to the NTD Safety & Security Reporting Policy Manual available at https://www.transit.dot.gov/ntd/manuals for more...
KEY: N = data do not exist; P = preliminary; U = data are not available.
a Starting in 2015, Rail Transit Injuries for all modes except commuter rail includes all injuries resulting from incidents. Incidents include all collisions, derailments, fires, security events, and not otherwise classified safety events meeting National Transit Database (NTD) reporting thresholds (note: Some thresholds have changed through the years.). Please refer to the NTD Safety & Security Reporting Policy Manual available at...