Abstract: A drag reduction system [1000] is described for large vehicles [100] and trailers. The device includes an air deflector [1100] which is mounted on a hinged attachment piece [1200] near the rear section [130] of the vehicle [100]. The hinged attachment piece [1200] allows the air deflector [1100] to extend past a rear section [130] of the vehicle [100] deflecting an air stream at an angle behind the vehicle [100]. The air deflector [1100] is allowed to pivot such that it does not extend past the rear section [130] of the vehicle [100] allowing the vehicle to back up to a loading dock. A second embodiment includes a leading arm [1500] and a trailing arm [1600] pivotally connected to the air deflector. The air deflector [1100] is allowed to translate forward and out of the way allowing the vehicle [100] to mate with a standard loading dock.