This might be more appropriate in the A&S forum, or in the Winter forum.
My commute is about 14 miles. The first three are on suburban 30 mph roads, the next 10 on a road that is mostly 55 mph with soem stretches of 45. There is a good shoulder (about 5 or 6 feet in most places), but I'm not sure how clear it is in the winter.
I can dress for the cold, but I'm not sure of what my level of safety will be if I decide to try winter commuting.