W. K. Lis
Superstar
Ottawa's Transitway is superior to typical BRT with signal priority like Viva Rapidways. It's similar to the eastern portion of the Mississauga Transitway, a super2 for buses with no at grade crossing. A lot of people will fall in love with them if they have them in TO.
If a transitway is built for isolated operation (fully grade separated), I don't see why they can't operate bi-articulated buses. It could be deem a private road (like a subway with tires) that can bypass the HTA.
Anyways, there isn't that many places to built super2 grade transitway in Toronto. Public transit with the TTC is always based on feeder buses to trunk rail transit lines since the beginning of existence. First with trunk streetcar line, later subways. There was never the idea of running bus routes from different parts of the city to downtown. The allow the system to evolve to the current easy to navigate grid system which help build the non commuting ridership base. The drawback with a grid system is it takes significantly longer to get from the suburbs to the core. Instead of travelling diagonally, it's always E/W and S/N.
The Montréal & Paris Metro could be called a "bus train", since they use rubber tires (and steel wheels to guide them). However, they don't call them buses. The bad news, they can't be used outdoors, have to be covered, underground, or sheltered.