It will never happen.
Not least the cost involved, but you imagine Ferrari. Oh yes, this is our new model. Hits the speed limit in first gear.
What also then happens when a car misreads a seed sign for the first time, anchors the brakes on and causes a massive pile up.
They always tell you about this stuff to cause outrage, then they will implement something not quite as bad and we all go "it could have been worse"