Mass. Gen. Laws ch. 34B, § 6
(d) All rights, title and interest in real property that were held by counties for county road purposes on the date that the county was abolished, in this chapter called county roads, are hereby transferred from the commonwealth as provided in this subsection. For any abolished county that has a successor council of governments, rights, title and interest are hereby transferred to the successor council of governments. For any abolished county that has no successor council of governments title is hereby transferred to the respective towns in which the interests lie. Rights, title and interest in the following properties shall not be transferred under this subsection:—