asiana flight crash at san francisco
the undershoot area has not helped the situation. it consists mainly of water, not considered to be of much use to non-amphibian aircraft. where it joins the land there is a large immovable obstacle, namely the seawall which took out this aircraft. (does that meet undershoot obstacle criteria?) I would have thought more solid ground is required in the undershoot area, say for the distance taken up by frangible approach lighting if runway shortening is not an option.
( or the obvious alternative of moving the threshold down the runway thus allowing an undershoot area in which an aircraft can actually undershoot in one piece. the present one seems unfit for purpose...)