N.J. Stat. Ann. § 39:5A-4

The provisions of subtitle one of Title 39 of the Revised Statutes shall be applicable to the semipublic or private roads, streets, driveways, trails, terraces, bridle paths, parkways or other roadways open to or used by the public for purposes of vehicular traffic, either as a matter of right or otherwise, within any park maintained in whole or in part by any municipality.