With overnight temps in the teens, something we don't get around here much in the 30+ years I've lived in the Puget Sound area of Washington State, I have chickened out of the bike commuting this week, mainly due to concerns about black ice. My commute has me riding through a construction area which often has water running across the shoulder or the street - this condition has existed prior to the construction - and I'm concerned hitting this area could lead to a broken collar bone, wrist, arms, rib, or worse. (I'd read stories online of other bike commuters doing these things while crossing icy bridges or overpasses).
So, yeah, I'm a chicken this week, but at least I won't be on crutches for Christmas. I intend to drag out the trainer this weekend so I can still get some "miles" in and in the meanwhile, I'm hoping for rainy weather in the 40s returns soon... that's pretty twisted and sick, huh?