(A) It shall be unlawful for any person to park a school bus of any length, semi-truck or the tractor unit or the trailer unit of such semi-truck, and any other vehicle or trailer which is 27 feet or more in length overall, except as hereinafter provided, on the public streets for a period longer than three hours as hereinafter provided.
(B) The emergency parking of vehicles described above, due to mechanical breakdown or failure, is permitted on any street, alley or highway for not longer than ten hours. It shall be unlawful to park a travel trailer or a self-propelled recreational vehicle for more than 72 hours on any street.
(C) For purposes of this section, PUBLIC STREET shall include public street right-of-way as platted, whether or not improved.