I've never been in that situation, and hope I never will be, but I would certainly hope I would had the presence of mind to keep a path clear so I could be seen

I've never been in that situation, and hope I never will be, but I would certainly hope I would had the presence of mind to keep a path clear so I could be seen and get out of the vehicle. If you're traveling that part of the country in the winter without planning for being stuck in the snow, then you're being incredibly foolish. Just a bit of common sense goes a long ways.