The following words and phrases, when used in this article,
shall have the meaning respectively ascribed to them in this section,
as follows:
Any motor vehicle other than a motorcycle designed or used
for the transportation of property, including every vehicle used for
delivery purposes.
Every vehicle, as herein defined, which is self-propelled.
Every vehicle without motive power designed to be drawn by
another vehicle and attached to the towing vehicle by means of a reach
or pole, or being boomed or otherwise secured to the towing vehicle,
and ordinarily used for transportation of long or irregularly shaped
loads, such as poles, pipes or structural members capable generally
of sustaining themselves as beams between the supporting connection.
Every vehicle of the trailer type so designed or used in
conjunction with a motor vehicle that some part of its own weight
and that of its load rests upon or is carried by another motor vehicle.
Every vehicle without motive power, designed or used for
carrying property or passengers, wholly on its own structure, and
to be drawn by a motor vehicle.
Every vehicle designed or used primarily for drawing other
vehicles, and not so constructed as to carry a load other than a part
for the weight of the vehicle or load drawn.
Every mechanical device in, upon, or about which any person
or property is or may be transported or drawn upon a public highway,
including motor vehicles, commercial motor vehicles, truck tractors,
trailers and semi-trailers, severally as herein defined, but excepting
devices moved by heat and power [or] used exclusively upon stationary
rails or tracks.
(1995 Code, sec. 16-22)