My first duty station was Ft. Riley, KS where, due to it being an active army base, I got to see the driving habits of folks from all over the country, readily identified by their license plates.
My general observation was that if you saw a vehicle in a ditch or a snowbank, it was actually more likely to have a northern plate, whereas cars with southern plates tended to be driven across post at 5 mph or less. My conclusion was that a lot of yankees (myself included) tended to be overconfident with the, "I grew up in this," attitude, and perhaps even felt the need to display their prowess, while southerners tended to white knuckle the steering wheel and felt they could not be too cautious.
My first encounter with black ice was in Germany. I was stuck in a traffic jam due to an accident. While completely stopped, a side wind blew me into a bus stop. I have great respect for black ice on the road.
I took my road test in NJ with 6-8” on the ground