I wish they plowed the MUPs here! There's no way I can traverse them on my 35mm studs. Besides, they're all covered with cross-country ski tracks; I'd likely need a Pugsley to ride successfully on them (although the skiers would probably be yelling at me to get off their path). Our bike lanes are the same as yours; covered in plowed snow piles. The city has created numerous new bike lanes in the past few years, but I guess they only figure they need to be used in warmer weather.