As used in this article, the following terms
shall have the meanings indicated:
ENGINE BRAKE RETARDER
A mechanical device which is designed to supplement a vehicle's
service brakes by producing a retarding torque about one of the rotating
components in a vehicle, converting kinetic energy to heat and thereby
retarding the forward motion of a vehicle.
A.
An engine brake retarder converts a diesel engine
from a power-producing motor to a power-expending air compressor by
changing the timing of the opening of the engine exhaust valves.
B.
An exhaust brake retarder constricts the flow
of exhaust gases through the manifold, increasing the system back
pressure and keeping the engine exhaust valves from closing at designed
intervals.
C.
An hydraulic brake retarder converts kinetic
energy to heat by shearing a liquid with a rotating component inside
a chamber.
HIGHWAY
The entire width between the boundary lines of every way
publicly maintained when any part thereof is open to the use of the
public for purposes of vehicular travel. The term includes a roadway
open to the use of the public for vehicular travel on grounds of a
college or university or public or private school or public or historical
park.
MOTOR VEHICLE
Every device which is or may be moved or drawn upon a highway,
except devices used exclusively upon rails or tracks.