I was thinking about this earlier today. After the fairly temperate weather yesterday (40s with light rain) I was surprised to wake up today to find a layer of ice covered with 3-4 inches of snow, and flurries still falling. The road conditions were not horrible, but a little more caution than normal was sensible. As I was on a bus on the highway we passed a car going very slowly with a driver who was being timid and over-cautious. The bus driver was so annoyed that she honked the horn as she sped past them. So I got to thinking, we don't get a ton of bad weather in PA, but we get our fair share, and yet there are still people who seem to overreact. Then I thought of what it'd be like in an area that got 1/10th of the bad winter weather that we get. Maybe only 20% of people in those areas would overreact and drive terribly, but 20% of thousands of drivers could quickly turn into a disaster, with gridlock or even something quite dangerous. So even though 80% of the people might be fine, yet because the 20% could cause problems for everyone, a lot of stuff going on with schools, businesses, etc. might grind to a halt. With that in mind they may simply be quicker to take precautions, just to be on the safe side. I'm sure people in other areas think the same thing of we in PA, who will call off school for conditions that others would find trivial or perfectly fine to travel in.