Driving in upstate New York, I saw this all the time when the weather got bad. Most people had the sense to just pull over and wait it out if the snow got really bad, but everyone once in a while you'd see someone who just couldn't bring themselves to slow down no matter what... inevitably, you'd see them stuck off the road entirely at the next bend in the road.
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In the South where I live, it's so bad. Everybody with an SUV thinks that they can just speed along in the snow. They don't get that while four-wheel drive will help you start going, it does not help you stop or turn!
I'm moving away to college in a place over the mountains from where I live. I'm going to have to get snow tires and chains before doing so because of how cold it gets. But, I'll bet you there will be people who won't....
As a fellow upstate NYer, I want to add that this can apply equally to something as seemingly innocuous as rain. We get some crazy microbursts, to the point that even new tires on a decent road can and will hydroplane. Also, HEADLIGHTS. If your windshield wipers are on, so should be your headlights, but people just don't seem to get this. It makes it so much easier to see and avoid hitting other cars.