61-9-101. Application -- exceptions. (1) The provisions of this chapter relating to the operation of vehicles refer exclusively to the operation of vehicles upon highways except as provided in subsection (4) or where a different place is specifically referred to in a given section.
(2) The operation of motor vehicles directly across the public roads and highways of this state, especially as required in the transportation of natural resource products, including agricultural products and livestock, may not be considered to be the operation of the vehicles on the public roads and highways of this state. The crossings must be adequately marked with warning signs or devices relating to stopping before entry and to restoration of any damage, as may reasonably be prescribed by the state or local agency in control of safety of operation of the public highway involved.
(3) If a provision of this chapter conflicts with federal laws or regulations governing motor vehicle equipment standards, the applicable federal law or regulation supersedes.
(4) (a) Except as provided in subsection (4)(b) and subject to subsection (4)(c), the provisions of this chapter apply to the operation and equipping of a motorcycle or quadricycle only when the motorcycle or quadricycle is being operated on a paved highway. A person operating a motorcycle or quadricycle on an unpaved highway shall operate the motorcycle or quadricycle in a reasonable and prudent manner.
(c) The provisions of this chapter do not apply to the operation and equipping of a quadricycle that is being operated for agricultural purposes on an unpaved highway or on a paved highway that is not an interstate highway as defined in 60-1-103.