Quote:
Originally Posted by Truenorth00
Even after extending to Riverside South, the total capacity of the Trillium Line will not change that much. We're still talking 8 min headways and a maximum of say 540 pax per FLIRT. That's a max of 4320 riders per hour if we're generous, in 2021.
The Confederation Line has a capacity of 10 700 pulling into Bayview this November. So as long as there's 40% of the capacity free at Bayview, the transfers will be fine.
And that's just based on the numbers we have. OC Transpo will have nearly 3 years worth of data at the launch of Trillium Stage 2 and extra vehicles for the Confederation Line already built. So they can easily adjust capacity, if forecasts don't pan out. Not just extra trains, but even lengthening the trains themselves by adding an extra car to make it 59m long, would boost the capacity of each train to 330 pax at least.
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I'm going to play both sides of this argument since the truth lies somewhere in the middle.
On one hand, your argument above is kind of like the joke about the statistician who decided to take up archery. On his first shot, he missed the target by a foot to the left. On his second shot, he missed the target by a foot to the right. He walked away happy because on average he got two bull's-eyes.
If (and that is a big if) the Trillium Line trains (at the projected 12 min frequency) are full when they arrive at Bayview, and
if it takes 4 Confederation Line trains (at a 3 minute frequency) to clear the platform, statistically it might be meeting the demand, but it would be a very frustrating experience for the the people who have to watch 3 trains go by.
Having said that, I don't see the Trillium line trains being anywhere close to full at Bayview any time soon (if ever). Even after Stage 2, I expect Carleton will continue to be the busiest station on the Trillium line, with the majority of the riders getting off there. While it is true that some more will get on the train north of Carleton, I don't see anywhere close to 270 people getting on each train (1350 per hour) at Carling and Gladstone to fill them back up, even with massive TOD.
As a result, the eventual capacity limitations of the Trillium Line will be based on how many people are on the train when it approaches Carleton, not Bayview,
Now this is not to say that there will be no value in building a second downtown tunnel 30 years from now (sometime around 2050) as that will provide many other benifits, but it is a bit early to be planning that, as the city will have changed a lot by then and most of the current politicians will be long gone.