You know, it’s not only in winter. And it doesn’t always come down to winter stuff.
E.g. this early spring I saw no danger: no snow, no ice, cool but sunny ... until I was crossing a railway. A thin, invisibile layer of ice got me down. Again: I saw now danger, so spikes or any other defensive measures never came to my mind when I left my home.
In example above, just being aware of potential danger would’ve been enough. By crossing the railway with caution (walking).