The Portland, OR area is bad when it snows....it doesnt snow often or enough here for people to learn how to drive in it or be prepared, but it does snow often enough to really screw things up when it happens.
Part of my route is in a rural, hilly area that goes up about 1000 feet above the Willamette Valley. I can start my day out in the rain on the valley floor, but if I drive up one road for 10 minutes I will be in 6" of wet slushy snow. I have gotten really good at chaining up, sometimes I have to put them on and take them off several times in one day because they will break if you drive them on bare pavement for any length of time. I also have customers who are well aware of the fact that if there is any snow on the ground I will not even try getting up their driveway.
I have gotten stuck in the snow and been pulled out by a customers tractor on several occasions. There are enough farmers on my route with tractors or 4x4 pickups that I know I wont be stuck for long.