I think if it too difficult one day, you just find another way to work, ya dont want to get killed before your time lol Dont they plow the roads near you? Just wait till they plow.

I dont commute cause i work outta my van. But I ride at least 5 times a week all year long in Michigan.
Most of the time I can ride,,,if it is too crazzy like 10 inches of snow before they can get it plowed,,I wait till most streets are plowed before I ride,,seldom is it impossible to ride for more than one day at time.