Maryland Transportation Section 11-158

      (a)      "Semitrailer" means, except as provided in subsection (b) of this section, a vehicle that:

            (1)      Has no motive power;

            (2)      Is designed to carry people or property and to be towed by a motor vehicle; and

            (3)      Is constructed so that some of its weight and load rests on or is carried by another vehicle.

      (b)      "Semitrailer" does not include a pole trailer.