I went to U of M in A2; On a Friday evening, on my way back home to Chicago, almost exactly 14 years ago (late Jan), there was a sudden, severe onslaught of lake-effect snow that iced over very quickly after a quick window of freezing rain. I lost control of my car BEFORE a bridge, even though I was barely going 35mph, near the New Buffalo exit and slid out of control on the bridge overpass (I would have gone over the bridge had there been no metal guardrails, and probably wouldn't be here today).
The point I'm trying to make is that back then, MI seemed pretty lax in cleaning up highways during snowstorms, regardless of regular downfall or lake-effect...this especially in 'rural' western Michigan. Not sure if things have changed much since then, but considering the video above, perhaps not?