Linear OSCO SG Wishbone Barrier Gate The OSCO SG barrier gate is designed to control industrial vehicular traffic. The gate can be actuated by different devices, such as radio controls, single- and three-button control stations, digital keypads, coded cards, sensing loops and telephone entry systems. The Model SG barrier gate can be used for large industrial vehicular traffic. For high-use applications on wide driveways, it is recommended to use two model BGU 12, one on each side of the driveway. The Model SG barrier gate control system is designed to accept most available entrapment devices and has function switches that will allow for various methods of control.