eight inches or above of overnight snowfall will get me to take my shortest way to work. I have two route options. And the short way gets me to the main thoroughfare the quickest where I count on it being plowed. If it is, then the ride isn't so bad. If it isn't then I'm riding down a tire track the best I can to keep moving forward. But in a storm like that I'll leave a half-hour or 45 mins early to make up for the rough weather. And that all occurs at 4am.