Speaking of protected cycle paths, Mississauga has actually been doing a decent job adding cycling paths (though multi-use) separated from the road.
Here is an example on Winston Churchill. Intersections could still use some work.
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Intersection of WC and Britannia has bicycle signals, and painted intersection crossing, with protected bike path on Britannia crossing it.
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Winston Churchill has this protected bike path from Eglinton all the way to Argentia, about 7 km north/south. Britannia has a path from Ninth Line to Erin Mills, a gap through Streetsville, and then continues from Queen to Hurontario.
If Mississauga with its 0.4% cycling mode share can make investments like this, I think Toronto should be able to do something similar on suburban streets. For people who live close to work in Mississauga, commuting by bike on protected paths is getting pretty close to reality. And the city only aspires to have 2% cycling share in 2041. Should also make it easier to cycle to the GO stations (investments in secure/sheltered bike parking) etc.