A hydroformed and roll-formed cross sill assembly for a vehicle and method of making same includes a pair of hydroformed tubular side members. A processing unit is comprised that is configured so that, when a character has met a certain condition relative to an object, of the display elements configuring an object deployed in an area related to the movement of the character, the display density of at least some specific display elements can be gradually altered. Towing vehicles typically include a frame that is made from strong robust channels on both sides of the towing vehicle. The temporary angles are corrected in accordance with at least one evaluation function calculated from the temporary angles.