e/Four-quadrant gate

Information
has gloss	eng: A four-quadrant gate is a type of boom barrier gate protecting a grade crossing. It has a gate mechanism on both sides of the tracks for both directions of automotive traffic. The exit gates blocking the road leading away from the tracks in this application are equipped with a delay, and begin their descent to their horizontal position several seconds after the entrance gates do, so as to avoid trapping highway vehicles on the crossing. Four-quadrant gates are safer than two-quadrant gates, because they prevent drivers from illegally driving their vehicles around lowered gates to try to beat a train.
lexicalization	eng: four-quadrant gate
instance of	(noun) intersection of a railway and a road on the same level; barriers close road when trains pass grade crossing, level crossing

Media
media:img	Level crossing - Chertsey - England - 270404.jpg