It is not something we would think about in Australia, but piling snow causes problems for trains in certain countries, so the snow has to be 'ploughed' off the tracks. From what I can see, either momentum with angled ploughs push the snow to the side, or if the train is fast, throw the snow aside, or a combination of the plough and blowers are used.
I remember our friend in Japan telling us that some tracks in Japan have constantly running water sprinklers along the tracks to melt the snow, somewhat amazing for us who live in such a dry continent.
This clip is a quickie for you to get the idea. God help anything under the snow.
This clip is much longer and perhaps will please steam enthusiasts.