Each parcel or tract used for a group of townhouses must have at least 100 feet of frontage with access on either an arterial, collector, or primary street, having a minimum cartway width of at least 32 feet. Interior access drives which are dedicated for public use shall be improved to minimum standards contained in Section 503 of the Bristol Township Subdivision and Land Development Ordinance. If not dedicated for public use, conveyance to a community association shall be required and provision for maintenance charges shall be made.