Or with extending the Eglinton line along the transitway. I don't see the point.
It would maintain the connectivity of the Transitway to Renforth and the Airport for GO buses, but would also provide a rail-based connection to Square One from Toronto.
Not only would it allow buses to use the transitway after construction of the LRT, it would also be during construction so short sections of track can be laid while the bus transitway is still in service.
Very true. The configuration that I envision is the areas in between stations would just have tracks laid within the roadway (with buses driving over them, like streetcar tracks). At stations, the tracks would veer towards the outside lane and serve the station, while the inside bypass lanes would be for buses only.
GO and MiWay buses could continue express through the stations, while the LRT would make the station stops.