N.H. Rev. Stat. Ann. § 162-C:11

No person, or the person's successor in title, who has granted or sold rights of public access by virtue of an easement, right-of-way, development right, or other means in accordance with the purposes of this subdivision shall be liable to a user of that right of access for injuries suffered on that portion of the access way unless those injuries are caused by the willful or wanton misconduct of the grantor or successor in title.