Vanes are used for reducing drag on a moving vehicle having a substantially planar rear surface. The current disclosure describes a means for mounting vanes to a vehicle using pliant material which creates no work for the driver of the vehicle during loading or unloading activities. The apparatus is
extremely light weight, and includes a rigid vane of length L having a
leading edge, a
trailing edge, and an aerodynamic center therebetween, positioned at a distance of between 0.15 L and 0.5L from said
leading edge. The vane has an inner surface facing the vehicle and an outer surface. At least one first pliant attachment means connects the
leading edge of the vane to a side surface of said vehicle; at least one second pliant attachment means connects the inner surface of said vane to a rear surface of said vehicle; and a third pliant attachment means connects the
trailing edge of the vane to the vehicle. The second pliant attachment means is connected to the inner surface of the vane at a distance of between 0.15 L and 0.5L from the leading edge of said vane; or at the aerodynamic center of the vane. The vane helps prevent or reduce formation of a zone of turbulent air behind the vehicle. The apparatus allows substantial reductions in fuel consumption and, as a result of the fuel savings, the invention also reduces
truck CO2 emissions during use.