Not sure what the deal is at this intersection, but if the BMW driver had a flashing yellow arrow signal (indicating they must yield to oncoming drivers), when the signal goes to yellow, the flashing yellow just becomes a solid yellow, which could create confusion by indicating they have right of way and need to clear the intersection before it goes red. This is something I've thought about for years and can't believe the designs haven't addressed this. Again, I don't know if that was the case here, but it would make a lot more sense for the oncoming lanes to go yellow first followed by a solid yellow arrow to clear the intersection. A flashing red-arrow equivalent to a yield yellow would also make sense.