Unfortunately the beg button doesn't actually turn the light red it just makes the next phase slightly longer. The truck and the tesla crash together around the baby and promptly burst into flames while you desperately push the button. As they burn, the light changes on schedule and stays green an extra ten seconds for the walk signal.
Depends. On some intersections, the main road may always be green until either a vehicle sensor or pedestrian cross button is pressed. Depending on various conditions and settings, sometimes pressing can immediately cause the light to turn yellow.
There are a bunch of those main road always green until the sensor or button happens intersections near me. Pressing the button makes them change about 3-5 minutes later. A vehicle triggering the sensor makes them change usually about 1-2 minutes later.
Yeah. Its pretty hit-or-miss. it seems pretty rare to find spaces that setup the lights to handle interrupts well. Makes no sense to make people wait longer when the crosstraffic sensors doesn't sense anything and the interrupts haven't happened within a very short period, yet that seems the norm around where I live. So I'm always pleasantly surprised when I'm in a more pedestrian-friendly area that does do it correctly.