Over a foot of snow in your way? It's no problem if you're piloting a locomotive with over 4400 horsepower to behind it to plow right on through. It is a problem though if you're trackside as it goes by.
It's the convention in Portland that you probably never even knew was happening, but might of thought something was up if you saw 30 vintage railroad cars pulling into town. When I went to get pictures of them the railroad police scared me away.