As used in this article, the following terms
shall have the meanings indicated:
AUTHORIZED EMERGENCY VEHICLES
Vehicles of the Fire Department, police vehicles and such
ambulances and other vehicles as are approved by the chief administrator
when operated in response to an emergency as defined by N.J.S.A. 39:1-1.
MOTOR VEHICLE
Includes all vehicles propelled otherwise than by muscular
power, excepting such vehicles as run only upon rails or tracks and
motorized bicycles as defined by N.J.S.A. 39:1-1.