#transportation_system__transportation__transit  facility consisting of the roads and equipment necessary for the movement of passengers or goods
  supertype:  #installation__facility  a building or place that provides a particular service or is used for a particular industry; "the assembly plant is an enormous facility"
  subtype:  #highway_system  #public_transit  #short_line  #telpherage
  part of:  #infrastructure
  part:  #airfield__landing_field__landingfield__flying_field__field  a place where planes take off and land
     part:  #apron.paved_surface  a paved surface where aircraft stand while not being used
     part:  #runway  a strip of level paved surface where planes can take off and land
     part:  #taxiway__taxi_strip  a paved surface in the form of a strip; used by planes taxiing to or from the runway at an airport
     part:  #flight_line  place where airplanes are parked and the maintenance hangars (but not the runways or taxiways)
  part:  #bridge__span  a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.
     part:  #arch  (architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it
        part:  #keystone__headstone  the central building block at the top of an arch or vault
        part:  #springer__impost  the lowest stone in an arch -- from which it springs
        part:  #voussoir  wedge-shaped stone building block used in constructing an arch or vault
     part:  #pier  a support for two adjacent bridge spans
     part:  #trestle  a supporting tower used to support a bridge
  part:  #line.common_carrier  a commercial organization serving as a common carrier
  part:  #public_transport  conveyance for passengers or mail or freight
  part:  #depot__terminal__terminus  station where transport vehicles load or unload passengers or goods
  part:  #way  any artifact consisting of a road or path affording passage from one place to another; "he said he was looking for the way out"
     part:  #wayside__roadside  edge of a way or road or path: "flowers along the wayside"

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