N.J. Stat. § 27:7-36
In the location of state highway routes the commissioner shall not locate, lay out, construct, use or improve any route in, over, under, through or across a park, reservation or parkway owned by or under the control and jurisdiction of any park commission organized under the provisions of sections 40:37-96 to 40:37-174 of the title Municipalities and Counties, without the consent of the park commission.
The state highway commissioner and the county park commission may contract with each other in relation to the location, laying out, opening, improving, construction and maintenance of a state highway route or routes in, over, under, through or across any park, reservation or parkway owned by or under the control and jurisdiction of the county park commission, fixing the location thereof, and defining the terms and conditions agreed upon for the laying out, opening, improving, construction and maintenance thereof, and until the making and delivery of the contract the state highway commissioner shall not enter in or upon any park, reservation or parkway for the purpose, except for preliminary surveys and examinations, of laying out, opening, improving, constructing, maintaining or using any state highway route in, over, under, through or across any such park, reservation or parkway.
To effectuate the contract the park commission may convey to the state highway commissioner any lands or rights in lands of such park commission in, over, under, through or across which any state highway may, pursuant to the terms of any such agreement, be located.
N.J.S. § 27:7-36