A boom barrier, also known as a boom gate, is a type of physical barrier typically used to control vehicle access at checkpoints, entrances, or exits. It consists of a long horizontal arm (the "boom") that can be raised or lowered to block or allow the passage of vehicles. Boom barriers are commonly seen at toll booths, parking lots, railway crossings, and restricted-access areas like gated communities or industrial facilities. https://www.novusapl.com/Ultrafast-Boom-Barrier-NS-BS7-P416.php