US Patent 8251436 Devices and methods for reducing vehicle drag

A vehicle trailer is provided. The vehicle trailer includes a pair of side wall fairings having a leading edge and trailing edge. Each side wall fairing is positioned on a different wall from the other adjacent to the rear edges of each of the walls such that the leading edge of each side wall fairing contacts the wall and the trailing edge of each side wall fairing does not contact the wall. Each side wall fairing has an upward incline and downward incline. The side wall fairings can be utilized with one or more other components that are described herein.