An automatic boom barrier, also known as a boom gate, is a device used to control vehicular access to a certain area. It consists of a horizontal bar or pole, known as a boom, that blocks the entrance or exit of vehicles. These barriers are typically used in parking lots, toll booths, checkpoints, and other restricted areas where controlled access is required. The operation of an automatic boom barrier is automated, usually controlled by a system that includes sensors, controllers, and sometimes access control devices like RFID readers or keypads. When a vehicle approaches the barrier, the sensors detect its presence, triggering the barrier to either raise or lower, allowing or denying access. https://www.novusapl.com/Ultrafast-Boom-Barrier-NS-BS7-P416.php