No person may operate an off highway vehicle upon any street or highway not designated as open to off highway vehicle use, except:
   A.   When crossing a street or highway and the operator comes to a complete stop before crossing, proceeds only after yielding the right of way to oncoming traffic and crosses at a right angle.
   B.   When loading or unloading any off highway vehicle from a vehicle which shall be done with due regard for safety and at the nearest practical point of operation.
   C.   When an emergency exists during any period of time and at those locations when operation of conventional motor vehicles is impractical or when the operation is directed by a peace officer or other public authority. (Ord. 2005-3, 8-8-2005)