Mass. Gen. Laws ch. 92, § 88: Agreements and contributions for improvement of public ways, bridges or streams

Section 88. The division may join with any city, town or county in the laying out, improvement, relocation, widening, repairing, maintaining and caring for any public way, bridge or stream which lies along or connects any reservation or boulevard owned or controlled by the division, and in the expense of such work, and for such purposes or any of them, may make contribution to such city, town or county by a grant of land or rights in land, although the same be already a boulevard, or by payment of money for its portion of such expense.