(a) 
The chief of police shall design an appropriate sign to be used upon streets for the purpose of controlling the right-of-way at the intersections other than through streets and state highways. The sign shall bear the word "yield," and when its design has been approved by resolution of the city council it shall be an official sign for streets.
(b) 
The chief of police shall investigate unmarked intersections of nonthrough streets and determine which are hazardous, and at each such intersection he shall install yield signs to control and restrict travel over the intersecting street that he generally finds receives, or for proper traffic movement should receive, a larger proportion of vehicular traffic.
[Code 1984, ch. 10, § 10(D)(1)]
The driver of a vehicle approaching an intersection where a yield sign is erected at the vehicle's entrance thereto shall retard the speed of his vehicle so as to yield right-of-way to any vehicle within the intersection or to vehicles approaching on the intersecting street so closely as to constitute an immediate hazard.
[Code 1984, ch. 10, § 10(D)(2)]
Proof that any driver drove past any yield sign and immediately thereafter was involved with or interfered with the movement of a vehicle proceeding along the intersecting street shall constitute prima facie proof of a violation of this division.
[Code 1984, ch. 10, § 10(D)(3)]