(a) No person, other than an employee in the performance of his or her official duties or other person authorized by the Agency of Transportation (in the case of State highways) or selectboard (in the case of town highways), shall plow or otherwise deposit snow onto the traveled way, shoulder, or sidewalk of a State highway or a class 1, 2, or 3 town highway.
(b) Nothing in this section should be construed to be in derogation of any municipal ordinance regulating the deposit of snow within the limits of town highways.