Rainforest
Senior Member
I don't think you'd shave that much time off to make a difference - but in any case there is no reason why an extension can't happen relatively quickly (other than it being an artificial delay). Certainly I think there is a better case for extending it all the way to Sheppard than a certain western extension that we are embarking on *cough cough*
AoD
Come on. Based on the recent history, no way the extension will open sooner than 20 years after Phase 1.
Technically, no obstacles to begin designing the extension while Phase 1 is being built (well, other than the capacity of the central segment). But, the mandatory fights over the priority corridors, the route choice, tunneled vs elevated etc .. plus a long wait for the actual funding .. 20 years may be an optimistic prediction.