Except where specifically authorized by the County, it is unlawful for any person or persons to stop, stand, or park any vehicle, including but not limited to trailers, campers, and motorcycles, for more than eight hours within a 24-hour period, or for any person or persons to camp or to maintain a camp, tent, or other sleeping accommodation or facility, in any safety rest area within the limits of the right-of-way on County roads or on other areas of County-owned land adjacent to County roads. The County may also designate zones within a safety rest area with shorter parking time limits for the purposes of maximum efficiency and safety. Commercial vehicles may park up to an hour beyond federally mandated rest periods.