The traffic engineer shall on the basis of engineering and traffic surveys:
(1) designate and maintain, by appropriate devices, marks, or lines upon the surface of the roadway, crosswalks at intersections where surveys indicate there is particular danger to pedestrians crossing the roadway, and at other places where surveys indicate they are necessary;
(2) establish safety zones at places where the surveys indicate it is necessary for the protection of pedestrians;
(3) mark lanes for traffic on street pavements at places where it is found necessary, consistent with this chapter and other traffic ordinances of the city. (Ord. 14584)