Prompted by the photo above of yet another type of snow-clearing train, this one in Alaska, I wanted to find video of the various types of snowblowing trains in action. Armed with these monster circular blades--it kind of looks like the tunneling machines we looked at last year—a train like this can clear snow in one pass when the level is manageable, i.e. less than half the height of the train:
But once the snow reaches a certain height and/or density, the snowblowing train has to go at it jackhammer-style:
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