Your posts play devil's advocate and absolve TDSB of any potential negligence, yet you find duck lady criminally negligent. Contradiction.
It is referring to posts 41 and 50.
I already answered how faults are determined already in accidents through insurance, including single vehicle activities.
As such, fault determination between the rider and her insurance technically has to account for negligence considerations and law, which needs to include TDSB actions and duty of care in the accident scenario.
I'm not seeing much in the way of OP negligence for riding on a street in traffic per se as her posts here. The devil will be in the details that she hasn't and shouldn't share here. Again, with what has been shown and described by the OP, at this time there is a potential case for duty of care negligence WRT the grass clippings.
I don't see anything where I absolve TDSB of any potential negligence. I can see them being deemed negligent, but notwithstanding that I can also see the OP being deemed at fault as well for not adjusting to what appears to be obvious debris in the lane ahead. Again, it's not a zero sum game.