A conventional truck is a type of truck with its engine in front of the driver (much like in a typical car) with a long bonnet, as opposed to underneath with no nose like in a cab over. In some areas they are called Bonneted units This model is the most common used by American truckers. The design gives the driver more leg room and a smoother ride. These models of semi-trucks hold their re-sale value much better than the cab-over engine models in the USA.