How Automatic Parking Boom Barriers Work: A parking boom barrier (also called a boom gate) is a mechanical or electronic gate with a long arm that moves up and down to control vehicle access to restricted areas like parking lots, toll booths, private roads, or entrances to buildings. A boom barrier allows or denies entry to vehicles based on access control systems. When access is gr... https://www.theeliteautomaticdoors.com/automatic-parking-boom-barriers/