N.J. Stat. § 27:7-44
No person shall place or allow to fall upon a state highway any broken glass, pottery or sharp object, or any substance injurious to the surface of the road or to the person, health or property of those using the highway or residing along the line thereof nor shall any person interfere with or injure any tree, handrail, wall, bridge, culvert or other public property within the lines of a state highway.
A person who violates any of the provisions of this section or who willfully damages, injures or destroys any such highway or its appurtenances shall be liable to a fine of not less than ten dollars nor more than twenty dollars for each offense together with the costs of prosecution, to be recovered by the department in the name of the state in an action at law in any court of competent jurisdiction.
The fines collected shall be paid into the state treasury to the credit of the funds available for the construction, maintenance and repair of roads.
N.J.S. § 27:7-44