Why do airports have perpendicular runways?

Airports generally have perpendicular runways, or runways that intersect each other at a right angle, in order to accommodate different wind directions and to increase the capacity of the airport. The orientation of a runway is typically determined by prevailing wind direction in the area.



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Many airports have intersecting runways, often as a consequence of expansion but also to provide a minimal crosswind option where wind direction is variable.

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The main objective of implementing simultaneous operations on parallel or near-parallel runways is to increase runway capacity and aerodrome flexibility. The largest increase in overall capacity often includes the use of independent approaches to parallel or near-parallel runways.

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Trivia: There are only 3 airports outside the US with 4 parallel runways: LFPG (Paris Charles de Gaulle Airport), LFTM (Istanbul Airport) and ZSPD (Shanghai Pudong International Airport).

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Aircraft on parallel runways both go in the same direction, so that a departing plane and arriving plane would both be flying in the same direction. There would be no head-on collision.

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The basic configurations are (1) single runways, (2) parallel runways, (3) intersecting runways, and (4) open-V runways.

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A runway should be marked according to its usage. The three classifications of runways are Visual Runways, Nonprecision Instrument Runways, and Precision Instrument Runways.

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Runway directions are largely chosen both for geographic land features of the site of the airport as well as the average local wind directions. As most winds blow from West to east in the continental United States, most runways will be oriented approximately in that direction.

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This guide will look at some of the most challenging airports in the world to land at.
  1. 1 Lukla Airport (Nepal) ...
  2. 2 Paro Airport (Bhutan) ...
  3. 3 Courchevel Airport (France) ...
  4. 4 Funchal Cristiano Ronaldo Airport (Portugal) ...
  5. 5 Saba Airport (Dutch Caribbean) ...
  6. 6 Narsarsuaq Airport (Greenland)


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Atlanta Hartsfield-Jackson International Airport remains the busiest airport in the world with 5.2 million seats in September 2023. The composition of the Global Top 10 Busiest Airports is also the same as last month but there are a few changes to the rankings.

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Objective. The main objective of implementing simultaneous operations on parallel or near-parallel runways is to increase runway capacity and aerodrome flexibility. The largest increase in overall capacity often includes the use of independent approaches to parallel or near-parallel runways.

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Irausquin Airport (IATA: SAB, ICAO: TNCS) is an airport on the Dutch Caribbean island of Saba. Its runway is widely acknowledged as the shortest commercial runway in the world, with a length of 400 m (1,312 ft).

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Wherever possible, aircraft take-off and land into the wind, so weather is one of the most important reasons in deciding which runway to use. Larger airports often have more than one runway, so a runway is always available for different wind directions.

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The letters, differentiate between left (L), right (R), or center (C) parallel runways, as applicable: For two parallel runways “L” “R.” For three parallel runways “L” “C” “R.”

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In June 2023, Phoenix Goodyear Airport (GYR) became the busiest single runway airport in the US with 19,722 takeoffs and landings. GYR is just ahead of San Diego International Airport. GYR is the 11th busiest General Aviation airport in the US, and the 49th busiest in the US of all airports combined.

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Same Runway Separation: One Arrival, One Departure If the other aircraft is departing and has crossed the runway departure threshold, separation is guaranteed and another aircraft may land. Again, however, exceptions apply: 1) 3,000 Feet of Separation: Category I aircraft landing behind Category I or II.

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Because perpendicular runways either intersect, which makes only one usable at a time AND uses up all the space in the middle of your airport with runways, or have to be spaced far apart, which uses a lot of space. Modern aircraft can handle crosswinds quite well and parallel runway...

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no one ever does. Some aircraft can do a so-called 'powerback', but in most cases, airplanes either don't have this technical capability. Most airplanes can taxi backwards by using reverse thrust. This entails directing the thrust produced by the plane's jet engines forward, rather than backwards.

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