[Christ]

Piwoslaw - That thing is a bumper extension. It would probably be a legal requirement wherever that truck is, and here in the 'States, the bumper is supposed to be the furthest point of the body fore and aft, so it would be a legal issue to not have it here, as well.

The bottom panel of the extension is lifted up so as not to cover the tail lights. A more cleverly designed setup would allow complete lower attachment without compromising the tails, possibly by integrating them inside the "dead" area of the extension. Ranging and lighting position laws apply, as well.