New Jersey Statutes Title 27. Highways 27 § 21-3

The cost of construction of a bridge or the widening of an existing bridge shall be borne by the board of chosen freeholders of the county, the canal corporation, its successors or assigns, over whose canal the bridge is constructed or widened, and the municipality in which the street or highway is located, in the amount or proportion agreed upon between them.  If no agreement can be reached the board of chosen freeholders may institute an action in the Superior Court.  The court may proceed in the action in a summary manner or otherwise and may apportion and determine the portion of the expense to be paid by each of the parties.