Story needs more details. Restaurant's snow clearing service should be fined for pushing snow into bike path. Dunno how snowpile caused accident, though. Maybe path was mostly clear and cyclist went off piste onto ice patch in order to avoid snow pile? Maybe snow pile created puddle during day that froze at night.

I ride on the ice with studs all the time. I'm not all that sue-happy though. Once I coulda sued the city for new bars, brake lever and bar tape after hitting an ice patch under a bridge. The water was drainage off a hillside that had flowed onto the otherwise clear and dry path. The area is an underpass so it's on a downhill slope and in a dark area. I hit it going about 18 mph and went down instantly.