Gen. Mitchell International in Milwaukee (KMKE) doesn't have more than 500 feet between either end of Runway 1L/19R and major roadways, and the southern roadway is in a rather deep trench.
I imagine these airports are now surrounded by so much other stuff that they will not be able to expand that buffer zone.
Like I just posted above, some airports have wanted to relocate but no one wants them in another neighborhood. When Denver put in their new airport, which was quite a way outside of town, everyone complained about the time it took to drive there. Can't win either way I guess.
I guess the main question here besides the buffer zone especially at the end of runway is whether they should have landed in the weather that was reported as dreadful.