Abstract: A height-adjustable enclosed semitrailer having a plurality of adjustable vertical supports for raising and lowering the roof of an enclosure, the enclosure comprising a plurality an overhanging upper body in some embodiments, and a retractable rearward door adapted to retract upwardly into a spool affixed to the roof.

Abstract: A method and system of a suspension adaptation to measure load of a commercial vehicle are disclosed. In one embodiment, a load measurement method includes loading a commercial vehicle with a weight, compressing a spring suspension system of the commercial vehicle using the weight, and determining the weight using a gas compression device and a vertical change in position of the commercial vehicle. The method further includes acquiring a pressure of the gas compression device to determine a loading level of the commercial vehicle.