The Service shall regulate the use of State park roads. Roads may be closed to traffic if the Service determines this action is necessary. Instruction from a park officer to reduce the speed of a vehicle, to bring it to a stop, to alter its direction, or remove it from a restricted area shall be obeyed immediately. Docking. An individual may not dock a vessel in an area posted against docking. Traffic on State park roads is subject to motor vehicle laws. The following acts are prohibited on State park roads not under the jurisdiction of the State Highway Administration or a county: Driving or parking a vehicle within or on a safety zone, walk, trail, or other area not designated and customarily used for vehicular traffic; Except for the time required to receive or discharge passengers, permitting a vehicle to stand outside a designated parking space; Permitting a vehicle to obstruct traffic by unnecessary stopping; Driving a vehicle over a State park road at a speed greater than that posted by the Service; Riding an animal, or driving or parking an animal-drawn vehicle in a developed area without permission of the Service; Driving a vehicle over a State park road in violation of traffic control devices placed by the Service; Permitting a vehicle to stand, park, or remain in a State park area after posted closing hours; and Permitting a vehicle to be parked or remain in a parking space exceeding the posted time without paying the parking fees. Parking Violations. Fines or penalties for parking violations shall be paid directly to the Service. An individual issued a citation for a parking violation may elect to stand trial by notifying the Service. An illegally parked vehicle may be removed and placed in storage at the owner's expense.