The intent of the public transit infrastructure fund is really for rehabilitation and optimization of existing assets. Every province may not have that need for rehabilitation, in which case there may be possibilities for expansion.
The trick will be that the funds are intended to be expended over the next two fiscal years. Typically, expansion projects take longer than that, so they would be likelier candidates, I would think, for phase two, which is going to be looking at larger projects, typically in expansion. However, phase one does allow for investments in planning for the kinds of expansion projects that you're describing for which the capital investment might flow later.