RSA 236:20: Snow Obstruction.

Any person who shall put or place or cause to be put or placed any snow or ice upon the surface of the traveled portion of any class I, class III, or class III-a highway or state maintained portion of any class II highway for any purpose, except to provide a place necessary for crossing, recrossing and traveling upon said highways by sleds, logging or farm equipment, shall be guilty of a violation if a natural person, or guilty of a misdemeanor if any other person. The provisions of this section shall not apply where snow or ice is pushed across the traveled surface of said highways for the purpose of snow removal from land adjoining said highways.