Quote:
Originally Posted by OCCheetos
How long do people think it might take for the Trillium Line's peak capacity to be exceeded again after Stage 2 is complete? (this is a genuine question, i'm wondering what the people who have been posting here think).
As it is now, the Trillium Line can just barely handle all of the passengers in the AM peak but it's not that uncommon to see passengers left behind at Mooney's Bay heading towards Carleton (it's happened to me before). Stage 2 will double (quite precisely) the capacity of the line with trains that are twice as long, but still the same frequencies with no flexibility to increase frequencies at all.
The line will be extended to serve two park and rides (basically replacing the existing buses that run into downtown/Hurdman I guess?) and a growing neighbourhood, as well as two infill stations, and it's possible the new hospital campus will be built which will also increase ridership noticeably.
My concern is that this additional ridership will grow to beyond what the Trillium Line will be able to handle sooner than the city will be able to invest in upgrading it again, or at least soon enough that not investing in it now would be looked back upon as being a huge mistake.
I understand and agree with why the opted to extend the line because of the return on investment in comparison to upgrading the existing line, but that isn't going to change the fact that the Trillium Line is going to be in a tight spot possibly within years of being upgraded... and whenever that does I sure as hell hope they don't need to shut the entire thing down again.
Random tidbit: The Trillium Line will have been closed for approximately 10% of its existence by the time Stage 2 is complete.
One more thing, I understand that the city probably doesn't have the resource to invest in a bigger upgrade now even if they wanted to, but right now it's easy for the city to justify shutting the line down for extended periods for upgrades since ridership isn't that high and they have a guaranteed revenue stream from the primary users of the line (via the upass) and shutting it down is likely much faster and cheaper than trying to perform upgrades while the line is still running, but later on down the road, when ridership is much higher, there are going to be a hell of a lot more unhappy customers who would have to deal with a shutdown, possibly enough to the point where the city may consider trying to do the upgrade while keeping the line running which will make the whole thing more expensive than what it would be now while they can still justify the closure. Maybe they won't, i don't know but someone is going to be unhappy about that upgrade and it's either going to be the passengers or the city for having to accommodate the other.
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I seem to remember hearing the planners saying it should provide enough capacity for at least 30 years (sorry I don't have a reference), and using some back of the napkin math, that seems reasonable. Here is my thinking:
Growth in Trillium Line usage can be lumped into two categories: Growth of its existing ridership base and growth of its new ridership due to the extension.
For the existing ridership base, assuming it is 5% above capacity right now (you said people can't always catch the first train), that means current peak ridership is 1418 pphpd (270 x 1.05 x 5). Assuming a 1% growth per year, the existing ridership base will grow to 1911 pphpd in 30 years.
As for the new ridership due to the extension, things get a bit more murky, as I don't know how full any of the exiting buses are (any feedback would be useful), but let me give it a go. The two main routes that currently travel north from Leitrim are the 99 (4 buses per hour) and 299 (1 bus per hour)*. The 294 (2 buses per hour) will also likely be rerouted to go to Leitrim Station as well. That is a total of 7 buses per hour. Assuming each one has 50 on board when they leave "the south" (an over estimate IMHO), that is a total ridership of 350 pphpd. If we assume 3% growth per year (because of massive growth though not likely sustainable for 30 years), that will grow to 850 pphpd in 30 years.
*the 93 also travels to Leitrim, but it is a much slower route than the 294, so I can't imagine many in Findley Creek using it during peak periods, unless they want to get off before South Keys, so LRT won't be an option for them.
As for the airport spur, much of its traffic will be more evenly distributed over the entire day and any peaks it does have be contraflow, so I assumed it will have minimal impact to peak capacity.
If we combine those two figures together (1911 + 850) we get 2761 pphpd in 30 years, which is slightly above the future capacity of 2700, but given that I believe that I overestimated some of my numbers, I don't figure it will be a problem. Even if i am spot on, it becomes an issue in 28 years, not 30.
Now to try and boost ridership and save money, I am sure OCTranspo will initially try to encourage some Barrhaven and South Keys residents to use the Trillium Line instead of the Southern Transitway, but once they start getting close to capacity, most of those can be diverted away again (especially once the Confederation line is extended to Barrhaven).