As used in this chapter, the following terms shall have the meanings indicated:
With respect to public streets, private property, public highways and public property, any vehicle which:
Is parked out of doors without the current year's registration or identification markers as required by law;
Is so disabled as to constitute an obstruction to traffic and the driver or person owning or in charge thereof neglects or refuses to move the same to a place where it will not obstruct traffic;
Is found to be mechanically inoperative; or
Is found without one or more tires.
Automobile, omnibus, road tractor, trailer, truck, truck-tractor and vehicle as defined in N.J.S.A. 39:1-1.