An aerodynamic skirt assembly is described therein, the aerodynamic skirt assembly comprising a ribbed skirt panel with at least one rib associated with the ribbed skirt panel to alter mechanical properties of the ribbed skirt panel, wherein the rib is providing a longitudinal stiffness of a thinner ribbed skirt panel that is comparable to a thicker non-ribbed skirt panel while allowing momentarily elastic deformation of the ribbed skirt panel when the ribbed skirt panel is contacting a foreign object while returning automatically to a non-deformed configuration when the ribbed skirt panel is not contacting the foreign object.