RSA 237:12 Exemption From Tolls.

I. The following motor vehicles shall be granted toll-free use of any section of the New Hampshire turnpike system:
(a) Motor vehicles bearing plates with the state seal as authorized under RSA 261:90.
(b) All vehicles with permanent plates as authorized under RSA 261:92.
(c) Military vehicles of the state and federal governments.
(d) Emergency vehicles going to and returning from their duties.
(e) Motor vehicles bearing plates registered to a New Hampshire municipality.
II. The commissioner of the department of safety may request electronic toll collection equipment from the department of transportation for unmarked vehicles of the New Hampshire state police and undercover vehicles of the department of justice not displaying permanent plates. Acc