Also means that should one escalator be down for maintenance, there still is others available to at the very least part of the run.More escalators mean more cost to purchase, install and maintain them in the long run. Better to have 3 longer escalators all the way down than 2 to an intermediate level and 2 more to platform level.
Sigh OBC. When up to 20m escalators is common, and up to 40m is possible.
I imagine this is what someone bringing ideas to TTC/Metrolinx to save costs hears from them - excuses on why it can't be done, when it can! There's a reason that North American transit costs are so high...
That was the problem with the Spadina moving walkway, there was only one in each direction. Should have been split to go at least half way. That's how they do it at airports.