A boom barrier, also known as a boom gate or boom barrier gate, is a pole or bar that can be pivoted to allow or block access to an area. These barriers are commonly used in parking lots, toll booths, railway crossings, checkpoints, and other similar locations to control the flow of traffic. Boom barriers typically consist of a sturdy metal pole or bar that is attached to a support structure on one end and a motorized mechanism on the other. The mechanism allows the barrier to be raised or lowered as needed to permit or restrict access. https://www.novusapl.com/Ultrafast-Boom-Barrier-NS-BS7-P416.php