The streets and parts of streets of the City designated by ordinance as through streets are hereby declared to be through streets. The driver of a vehicle shall stop at the entrance to a through street and shall yield the right-of-way to other vehicles which have entered the intersection or which are approaching so close on a through street as to constitute an immediate hazard unless directed otherwise by the traffic officer or a traffic control signal.
It shall be unlawful to operate any vehicle on any streets or alleys designated as one-way streets or alleys by ordinance, in any direction other than that so designated as shall be indicated by official traffic control devices.
Except when directed to proceed by a police officer or traffic control device or signal, every driver of a vehicle approaching a stop intersection indicated by a stop sign shall stop before entering the crosswalk on the near side of the intersection or, in the event there is no crosswalk, shall stop at a clearly marked stop line, but if none, then at the point nearest the intersection roadway where the driver has a view of approaching traffic on the intersecting roadway before entering the intersection. After having stopped, the driver shall yield the right-of-way to any vehicle which has entered the intersection from another roadway or which is approaching so closely on the roadway as to constitute an immediate hazard during the time when the driver is moving across or within the intersection, but said driver having so yielded may proceed at such time as a safe interval occurs.
Any street designated by ordinance as a yield right-of-way street and so posted is hereby declared to be a yield right-of-way street.
A. 
The driver of a vehicle approaching a yield sign shall in obedience to such sign slow down to a speed reasonable for the existing conditions and, if required for safety to stop, shall stop at a clearly marked stop line, but if none, before entering the crosswalk on the near side of the intersection, or if none, then at the point nearest the intersecting roadway where the driver has a view of approaching traffic on the intersecting roadway. After slowing or stopping, the driver shall yield the right-of-way to any vehicle in the intersection or approaching on another roadway so closely as to constitute an immediate hazard during the time such driver is moving across or within the intersection.
B. 
If a driver is involved in a collision at an intersection or interferes with the movement of other vehicles after driving past a yield right-of-way sign, such collision or interference shall be deemed prima facie evidence of the driver's failure to yield right-of-way.
Appropriate signs shall be posted to show all through, stop, and yield right-of-way streets; all one-way streets and alleys; and all stop intersections.