N.J. Stat. § 40:67-12.1
When a street or highway in any municipality has become closed or impassable, thus necessitating, in the opinion of the governing body of such municipality, the forthwith laying out, opening, widening or otherwise improving of the same or another street or highway, and lands or property, or any estate or interest therein, necessary for such purpose cannot be acquired by the municipality by agreement with the owner or owners thereof, whether by reason of disagreement as to the price, or the legal incapacity or absence of the owner or owners, or his or their inability to convey a valid title, or for any other reason or cause, such municipality shall have the right and power to enter upon and take such lands or property, or estate or interest therein in advance of making compensation therefor. In any such case, such municipality, promptly after such entry, shall institute proceedings according to law to fix the compensation to be paid the owner or owners of such property; provided, that nothing in this section contained shall apply to any land or other property acquired for or devoted to any public use by any board, commission or agency of the state of New Jersey, municipality or county of this state, or by any public utility as the same is defined by section 48:2-13 of the title Public Utilities.
N.J.S. § 40:67-12.1