I grew up in southern Ontario, and it took me an embarrassing amount of time to figure this out. I heard the acronym daily as my parents listened to CFRB, but it didn't click until I was almost 20.
TBF, Ontario (and most importantly, Toronto) are going through the biggest transit expansion in all of North America. For those unaware, I'll list some of the projects by transit agency:
TTC (Toronto local transit) has a new metro (the Ontario Line/eventually Line 3), and 2 new LRT/light-metro lines under construction
GO (region transit) is undergoing a huge expansion where they're increasing frequency and electrifying the lines, while also doing a bunch of smaller projects to decrease travel times and points of conflict
Mississauga/Brampton have the Hurontario LRT under construction (also owned by GO/Metrolinx, but local transit, so I separated it)
Hamilton's LRT is in planning
ION LRT in Waterloo is planning Stage 2
There are too many bike infrastructure projects to mention, and a lot of new urbanist developments.
At the same time, the provincial government also has a number of projects that are crazy car-centric, like Highway 413, so it's not all good.
It kind of amazed my friends from Ontario when a whole line of people waiting at the ferry terminal made it onto a double decker bus (close to 100), which would have been 50 passenger cars!
Why haven't we explored frequent oribtal GO routes numbered 401, 427, QEW, DVP, with dedicated bus lanes to weave through traffic with ease (BC highway 99 is set up decently well with them)? Sneaky drivers could jump the queue with the priority lane in typical Toronto fashion, but bus drivers with cameras can charge every license plate they catch that's improperly in the lane. Make it a hefty fine or revoke their license on repeat offenses.