Section 32:77 - No passing zonesA. The Department is hereby authorized to determine those portions of any highway 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 roadway indicate the beginning and end of such zones, and when such signs and markings are in place and are clearly visible to an ordinary observant person, every driver shall obey the directions thereof.B. Where signs or markings are in place to define a no-passing zone as set forth in paragraph A, no driver shall at any time drive on the left side of the roadway within such zone, or on the left side of any pavement striping, designated to mark such no-passing zone, throughout its length.