Maryland Transportation Section 11-146

      "Pole trailer" means a vehicle that:

            (1)      Has no motive power;

            (2)      Is designed to be towed by another vehicle and attached to the towing vehicle by a reach or pole or by being boomed or otherwise secured to the towing vehicle; and

            (3)      Ordinarily is used to transport long or irregularly shaped loads, such as poles, pipes, or structural members generally capable of sustaining themselves as beams between the supporting connections.