No-passing zones

(a) The director of transportation is authorized to and the counties by ordinance with respect to highways under their respective jurisdictions may establish no-passing zones where overtaking and passing or driving to the left of the roadway would be especially hazardous and shall by appropriate signs or markings on the highway establish or indicate the beginning and the end of a no-passing zone and may place intermediate signs establishing or indicating the continued existence of a no-passing zone. Signs or markings placed by the director of transportation establishing the zone and signs or markings indicating the zone established by ordinance shall be clearly visible to an ordinarily observant person and every driver of a vehicle shall obey the directions thereof. (b) Where signs or markings are in place to define a no-passing zone as set forth in subsection (a) no driver shall at any time drive on the left side of the roadway within such no-passing zone or on the left side of any pavement striping designed to mark such no-passing zone throughout its length. (c) This section does not apply under the conditions described in section 291C-41(a)(2), nor to the driver of a vehicle turning left into or from an alley, private road, or driveway.