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Originally Posted by Reecemartin
The current Expo Line rush hour capacity is close to 25kppdph and the individual train capacity is higher than was posted. We exceeded 15k on the Expo Line a long time ago, Canada Line and Millenium Line are both well below that but probably not for long. M-Line also can go to above 25k and Canada Maxes at 15k (though probably less in reality).
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Do you have a reference for that? The best I can find from Translink is
this document dated September 2010. I it, it says:
- "As of 2009, the peak hour demand estimated at 14,600 pphpd exceeded the system capacity of 13,300 pphpd"
- "capacity is now* at 16,000 pphpd" and
- "The Expo Line suffers from a number of physical and technological constraints which prevent the system from reaching an ultimate capacity of 25,700 pphpd without targeted investments being made."
* at the time the document was written.
While I am sure that today the capacity has increased even further, especially with the introduction of Mark III trains, it would surprise me that if in 9 years they would have nearly doubled capacity. Also, I was also under the impression that to reach the ultimate capacity, they needed to run 5 car Mark II (or better yet III) trains to fully utilize their 80m platforms, but they are currently only using a 4 car configuration.
One advantage the Confederation Line has that the Expo line doesn't, is that the downtown stations are in the centre of the line, so that trains in both directions are going to/from the suburbs, almost doubling the usable capacity of the trains traveling through the downtown core.
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Also worth noting that the Skytrain is probably always going to be capable of higher frequency than Toronto and Ottawa even with ATO because the LIM motors used on Skytrain simply offer better acceleration and don't require "grip".
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Interesting. I was not aware of that. However, acceleration rates are mostly limited by passenger comfort and not by "grip." Skytrian might get a bit of an advantage in that regard (especially in slippery conditions) but I don't see it being a massive difference.
The biggest advantages of Linear Induction Motors are that they provide faster emergency braking and and allow steeper grades.
The biggest limitation to frequency on an ATO system is station dwell time, especially when someone holds the doors.