Airport

An airport is an facility designed for aircraft to take off and land at. Beyond the runway, an airport may have a variety of facilities and infrastructure, including fixed base operator services, air traffic control, passenger facilities, and emergency services. A military airport is known as an airbase.

Airports vary in size, with those smaller or less-developed areas dedicated to aircraft operations are sometimes called airfields or airstrips. These smaller airports might include a single dirt or grass runway of less than 2000m, while larger airports for international flights have paved runways 3000m or larger. Size aside, any airport can have paved runways, with many airports in North America having paved runways shorter than 1000m.

Airport structures

At airports served by commercial flights, the buildings where passengers purchase tickets, clear security, and check or claim luggage are typically called terminals. The waiting areas which provide access to the airplanes are typically called concourses, although these terms are often interchangeable.

Both large and small airports can be towered or uncontrolled, depending on funds and traffic. Due to their high capacity and busy airspace, most international airports have air traffic control located on site.

International airports

International airports generally have a complex of buildings where passengers can embark on airliners, and where cargo can be stored and loaded. Customs facilities for international travel often distinguish an international airport, and require a more conspicuous level of physical security.

The largest international airports are often located next to freeways or are served by their own freeways. Often, traffic is fed into two access roads, designed as loops, one sitting on top of the other. One level is for departing passengers and the other is for arrivals. Many airports also have light rail lines or other mass transit systems directly connected to the main terminals.

Support services

Aircraft maintenance, pilot services, aircraft rental, and hangar rental is most often performed by a fixed base operator, e.g. British Airways at Heathrow.

Guidance Signs

Airport guidance signs provide direction and information to taxiing aircraft and airport vehicles and assist in safe and expediant movement of aircraft. Smaller airports may have few or no signs, relying instead on airport diagrams and charts.

There are two classes of signage at airports, with several types of each:

Operational Guidance Signs:

• Location signs – a yellow inscription on a black background. Identifies taxiway currently on or entering.
• Direction/Runway Exit signs – a black inscription on a yellow background. Identifies the intersecting taxiways the aircraft is approaching, with an arrow indicating the direction to turn.
• Destination signs –
• Other –

Mandatory Instruction Signs

• Holding Position signs –
• Runway signs -

Airport designation and naming

Airports are uniquely represented by their IATA airport code and ICAO airport code. In the U.S. and other countries, they are often named after a prominent local celebrity, commonly a politician.

Environmental concerns

The traffic generated by airports both in the air and on the surface can be a major source of aviation noise and air pollution which may interrupt nearby residents' sleep or, in extreme cases, be harmful to their health . The construction of new airports, or addition of runways to existing airports, is often resisted by local residents because of the effect on the countryside, historical sites, local flora and fauna. As well, due to the risk of collision between birds and airplanes, large airports undertake population control programs where they frighten or shoot birds to ensure the safety of air travellers.

See also

• list of airports
• heliport
• airport security
• world's busiest airport
• list of aviation topics
• NIMBY

External links

• ATCSCC Real-time Airport Status page – shows airport delay times for major U.S. airports
• AFRICASPOTTER.at.tt – Airports in Southern Africa