An operator of a vehicle approaching a "Yield" sign is subject to the following provisions:
(1) The operator shall slow to a speed that is reasonable for existing conditions and, if required for safety, shall stop before entering the intersection.
(2) After slowing or stopping, the operator shall yield the right-of-way to any vehicle in the intersection or approaching on another roadway close enough to constitute an immediate hazard during the time that the operator is moving across or within the intersection or junction of roadways.
(3) An operator of a vehicle shall yield the right-of-way to pedestrians within crosswalks at the intersection.
(4) If an operator of a vehicle, after having driven past a "Yield" sign, is involved in a collision with another vehicle at an intersection or junction of roadways or with a pedestrian in an adjacent crosswalk, the collision is considered prima facie evidence of the operator's failure to yield right-of-way.