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Efficiency is the (often measurable) ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result. In a more general sense, it is the ability to do things well, successfully, and without waste.
2
votes
Why do some airports have more than 2 runways, when LHR can get by with 2?
To complement Dan and TomMc:
Having perpendicular runways like in JFK allow for less cross wind take off / landing
Having multiple runways with less traffic allow more flexibility if one runway was …