Abstract: A vehicle restraining mechanism for a loading dock system includes a restraint assembly having a barricade member that is rotationally operable between a stored position, a blocking position and a verification position. The barricade member in the blocking position selectively secures a vehicle relative to a wall of a loading dock. A linear actuator laterally operates the barricade member along a linear path of travel that is generally perpendicular to a rotational axis of the barricade member. A sensor is in communication with at least one of the linear actuator and the barricade member. The sensor and the linear actuator cooperate to position the barricade member relative to a rear impact guard of a vehicle that is parked at the loading dock.