The invention is relative to a transport vehicle with a tractor and a trailer that are connected to one another during the transport of cargo by the cargo itself. The invention has the problem of making a transport vehicle available that also makes possible the transport on highways of very bulky material, especially such material that exceeds the usual profile height of underpasses and bridges (freeway bridges, etc.). A transport vehicle for a rotor blade of a wind power system with a tractor and a trailer that are connected to one another during the transport of the rotor blade by the rotor blade and that respectively comprise a holding device and/or receiving device for the rotor blade which holding device and/or receiving device is/are designed in such a manner that it/they permit(s) a rotation of the rotor blade about its longitudinal axis and that a drive for rotating the rotor blade is provided on the tractor and/or the trailer.