In my city, you have to keep the sidewalk clear of ice. You can get a $100 penalty for not doing it. It's rarely enforced unless they're trying to lay pressure on an absentee landlord, or if you live in a wealthier area.
Anyway, if somebody slipped and hurt themselves because I didn't maintain my sidewalk, I would totally get slapped with a $100 fine. The city wouldn't pursue it further because that's all I've done wrong. On the other hand, the person who slipped could sue me for medical bills, etc.
In this case, it seems that he got a typical penalty for distracted driving. Probably closer to the maximum, given the circumstances, but I'm not sure. He'll still end up paying the injured couple more directly in a different court.