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Created page with 'File:lighterstill.jpgright|frame ==Origin== [http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD ...'
[[File:lighterstill.jpg]][[File:Railroad-barriers.jpg|right|frame]]
==Origin==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] barrere, from Anglo-French, from barre bar
*[http://en.wikipedia.org/wiki/14th_century 14th Century]
==Definitions==
*1a : something [[material]] that blocks or is intended to block passage <highway barriers> <a barrier contraceptive>
:b : a [[natural]] formation or [[structure]] that prevents or hinders movement or [[action]] <geographic barriers to [[species]] [[dissemination]]> <barrier beaches> <drugs that cross the placental barrier>
*2plural often capitalized : a medieval [[war]] game in which combatants fight on foot with a fence or railing between them
*3: something immaterial that impedes or separates : obstacle <[[behavioral]] barriers> <trade barriers>
==Description==
''Automatic full barriers'' are a set of four half-barriers closing a road at a railway [http://en.wikipedia.org/wiki/Level_crossing level crossing].
Typically the '''barriers''' on the approach side to the crossing are lowered first with those on the exit side following shortly after. The [[sequence]] [[timing]] is set to allow enough time for a vehicle or [http://en.wikipedia.org/wiki/Pedestrian pedestrian] on the crossing to exit before the exit barriers come down. There are no examples of these in the UK. All full barrier level crossings in the UK are manually operated and not automatic.
[[Category: General Reference]]
==Origin==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] barrere, from Anglo-French, from barre bar
*[http://en.wikipedia.org/wiki/14th_century 14th Century]
==Definitions==
*1a : something [[material]] that blocks or is intended to block passage <highway barriers> <a barrier contraceptive>
:b : a [[natural]] formation or [[structure]] that prevents or hinders movement or [[action]] <geographic barriers to [[species]] [[dissemination]]> <barrier beaches> <drugs that cross the placental barrier>
*2plural often capitalized : a medieval [[war]] game in which combatants fight on foot with a fence or railing between them
*3: something immaterial that impedes or separates : obstacle <[[behavioral]] barriers> <trade barriers>
==Description==
''Automatic full barriers'' are a set of four half-barriers closing a road at a railway [http://en.wikipedia.org/wiki/Level_crossing level crossing].
Typically the '''barriers''' on the approach side to the crossing are lowered first with those on the exit side following shortly after. The [[sequence]] [[timing]] is set to allow enough time for a vehicle or [http://en.wikipedia.org/wiki/Pedestrian pedestrian] on the crossing to exit before the exit barriers come down. There are no examples of these in the UK. All full barrier level crossings in the UK are manually operated and not automatic.
[[Category: General Reference]]