(A) No motor vehicle with more than three axles and exceeding 21 feet in length shall be permitted to travel on any town-maintained street, except solely for the purpose of discharging and/or collecting passengers or loading and/or unloading goods, merchandise or materials at points or addresses on a town-maintained street.
(B) The following motor vehicles shall be excluded from the foregoing restriction:
(1) Vehicle drawn trailers, when the vehicle drawing the trailer is not designated primarily for drawing a trailer;
(2) School buses;
(3) Charter buses; and
(4) Non-scheduled buses.