The city of Vancouver may, by resolution of the city council, maintain and remove "yield right-of-way" signs at such locations as warrant the installation. The "yield right-of-way" signs may be installed at intersections of any minor street where the accident experience warrants precautionary warning of lesser degree than necessary at intersections where a full stop is required by this title. The yield right-of-way sign shall be an equilateral triangle shape with black letters designating "yield" on a yellow background. The operator of a vehicle approaching a "yield right-of-way" sign shall look out for and yield the right-of-way to all traffic on the intersecting street, which is so close as to constitute an immediate hazard, and shall reduce speed or stop if necessary in order to yield the right-of-way to such traffic. It is unlawful for the operator of any vehicle to fail to so yield the right-of-way as herein provided, and the operator of a vehicle proceeding past such a sign without so yielding the right-of-way to all traffic on the intersecting street shall be guilty of a traffic infraction as provided by Chapter 9.12 of this title. In the event that an operator of a motor vehicle proceeds past such a sign and becomes involved in a collision or other interference with traffic at such an intersection, then such collision or interference shall be prima facie evidence of the failure of the operator of the motor vehicle to yield the right-of-way. (Ord. M-2755 §6, 1988: Ord. M-185, 1954: Ord. C-184 §103A, 1948)