N.J. Stat. Ann. § 32:11C-4

Whenever necessary, because of the exercise of any of the powers herein conferred, to remove, alter, change or relocate any facilities owned by a municipality or any municipal agency of a municipality located above or below the surface of the street, road or highway or property vested in, or held by, the municipality, the commission shall pay the costs or expenses involved in connection with such removal, alteration, change, or relocation. All streets, roads or highways or parts thereof, designated and used by the commission as a part of any approach, bridge plaza or approach highway, shall be maintained and kept in repair by the commission.