My biggest concern regarding country lanes in the winter is idiot drivers presuming only cars will be using the lanes at night. A couple of years ago, cycling home from my sister's on Xmas day I was faced with a car taking the racing line around a bend. I guess they assumed the road was clear because they didn't see a car's full beam ahead of them.

Thankfully my very bright Cree light did mark me out in the last few seconds and I didn't get hit... but it was chuffing scary. This year I'll leave well before sundown.