N.J. Stat. Ann. § 27:7-54

All payments for such roads, parking areas and driveways, and improvements to existing roads, parking areas and driveways on lands owned by the State, shall be paid out of appropriations made to the commissioner for that purpose. Nothing in this section or section 27:7-53 of this Title shall be construed to prevent the inmates and employees of any public institution from being employed on repairs and improvements of roads, parking areas and driveways used in connection with the institution.