RSA 265:15 Interference With Traffic Devices, Signs, or Signals.

I. No person shall, without lawful authority, attempt to or in fact alter, deface, injure, knock down other than accidentally, remove, or possess any of the following items, or any part thereof, which have been previously installed by lawful authority:
(a) Any official control device; or
(b) Any railroad sign or signal; or
(c) Any inscription, shield or insignia found on any of the above.
II. (a) No person shall use or attempt to use any device designed or intended to change, disrupt, or interfere with the operation of a traffic signal.
(b) A person shall be guilty of a misdemeanor if convicted under this paragraph.
(c) This paragraph shall not apply to the following persons, who shall be permitted to use traffic signal preemption technology for e