No Cliff, in your opinion I have introduced irrelevancy, because I disagreed with you.
Assuming a pedestrian is adhering to prevailing traffic law, the pedestrian has the right of way.
While your examples are stellar, not every crosswalk is equipped with all the happy horse poop you describe. In fact, as a relative percentage, very few are. Why even here in the big city, you can go blocks without encountering a traffic light.
At a simple four way stop intersection, the pedestrian has the right of way, and traffic must wait until said pedestrian completes his or her criossing, before they proceed.
§ 3542. Right-of-way of pedestrians in crosswalks. (a) General rule.--When traffic-control signals are not in place or not in operation, the driver of a vehicle shall yield the right-of-way to a pedestrian crossing the roadway within any marked crosswalk or within any unmarked crosswalk at an intersection.
That's about as much research as I'm going to do, or willing to do. If you have any more questions, look it up yourself, before you dismiss my contribution.
That section is taken from Pennsylvania traffic law. Your results, in whatever part of the wild west you're from, may obviously vary.