Speed limit on Lansdowne, as is the case on many major roads in Toronto, is 40km/h. Of course some do exceed to the excesses you mention, but they are an exceptional rarity, especially on this particular stretch with a blind curve dipping under a train trestle (just out of frame to the right).

That's true. That said, I think we need to solve this prinarily by removing these vehicles from the city streets. By perhaps taxing size/power/etc. Similar to how Japan does it. Perhaps not to the extent of putting everyone in K-cars but most single-passenger trucks and SUVs used for commute should go away from most of the city. That would leave more space for tradespeople, supply trucks and vans getting where they need to go in reasonable time. And it would increase the safety on all bike lanes, separated or otherwise. It would also increase pedestrian safety.

It’s not meant to provide 100% protection. If somebody wants to kill a biker, they’re going to be able to. But if somebody isn’t paying attention and hits one of those, it will probably stop them.