Abstract: The invention relates to a system for a land vehicle (100), in particular for a truck or a truck trailer. The system is attached to the lower surface of the vehicle so as to lie opposite the roadway surface at the rear portion of the truck and comprises at least one part which is inclined in the longitudinal direction and extends rearwards in a tapering manner towards the rear part of the vehicle (100). At least one element (2, 12, 22) is arranged between the roadway surface and the inclined wall (3) substantially at the end of the inclined wall (3) after the last axle of the vehicle, wherein the horizontal axis of the at least one element (2, 12, 22) has substantially the same inclination as the inclined wall (3).

Abstract: The invention relates to a system for a land vehicle (100), in particular for a truck or a truck trailer. The system is attached to the lower surface of the vehicle so as to lie opposite the roadway surface at the rear portion of the truck and comprises at least one part which is inclined in the longitudinal direction and extends rearwards in a tapering manner towards the rear part of the vehicle (100). At least one element (2, 12, 22) is arranged between the roadway surface and the inclined wall (3) substantially at the end of the inclined wall (3) after the last axle of the vehicle, wherein the horizontal axis of the at least one element (2, 12, 22) has substantially the same inclination as the inclined wall (3).