Yeah ... the plan was to try it 6 months in both ways and see how it worked. (well originally the plan was to run it the first way).from what ive heard it ran for 6 months at most. then switched over to separate lines
This is my favourite image - from the 2010 diversion for tunnel repairs between Yonge and St. George. While the trains ran through Lower Bay, they didn't stop, given that the platforms and escalators aren't up to it.
We've heard for years that the originally envisioned service isn't possible given Line 1 extension to Spadina restricting the frequency. I wonder once they have ATC on Line 2, what the maximum frequency they could run.
I suppose if ATC had existed in 1966, then they might have been able to pull off the original configuration.