I snapped this photo of a large snow blower when I was passing through Nome last week. This is an amazing machine. It was grinding up hard chunks of ice and snow and sending them flying a couple hundred feet. The blower actually takes so much power to run that there is one engine just for the blower and another engine to make the vehicle move. If you look close at the photo you can see that both the front and rear wheels steer. This allows it to "crab" or drive sideways.