How do you find yourself in adverse conditions without prior knowledge? Ignorance?, Just holding the wheel with headphones on listening to Itunes? No understanding of weather patterns? Truck driving takes every aspect of education. Science and geography is a big part of it.
Easy.
We have all been in areas where snow was expected, but it wasn't expected to be a blizzard, then it became just that (after, and only after you started your day). At that point, you have a rule in place that allows you to get to your destination, and it is a rule that most are either afraid to use, or their company won't allow them to use because the company is afraid of it.
I've used it several times.

