I had the most difficult road conditions I've faced yet. We had some freezing rain through the night that changed to snow around 6AM. By the time I left the house there was about 2" on the ground. It kept coming down hard, alternating between big wet flakes and pelting sleet until about the time I arrived at work. The roads were mostly unplowed with 0.5-1" of packed snow on top of a thin layer of ice. Traction, even with my studded tires was terrible. I took the sidewalks and bike paths when I could. Wasn't as slippery there, but I had to plow through a few inches of fresh snow. But I got to work, without a wipeout. I'm glad my ride is short.
Should be better on the way home. It's supposed to warm up into the 40's with some rain for the commute back home. I'm expecting it to be wet and sloppy, but less treacherous.