Whenever the Department determines upon the basis of traffic engineering principles and investigation that the volume of traffic or the vertical curvature or other curvature of a roadway renders it hazardous to drive on the left side of the roadway, or to drive in the center portion of the roadway, the Department shall install distinctive roadway markings on such roadway or portions thereof, where no driving or crossing over such markings or to the left thereof is permitted. Such roadway markings shall be of a type consistent with the requirements of the Vehicle Code. (Amended by Ord. No. 134,523. Eff. 7/17/67.)