we don't really have enough snow/ice to make out-of-control vehicles into a problem. I have felt that way in my car though -- one snowy commute, the same idiot almost rear-ended me 5 times. I tend to ride on roads that don't have a lot of traffic. The bike path near me isn't plowed. The other municipalities in the area decided to plow, but the closest one decided they were accepting too much liability(?) by clearing the bike path. I rarely use it anyway

Last year I rode on the gravel fire roads in the nearby state forest quite a bit. There is one road where the snow was fine until the bottom, where there is a curve and there was a sheet of ice all winter. I never felt endangered there, but I came upon a large number of wrecks. Nobody ever accepted my offers of help extracting their car for some reason.