denfromoakvillemilton
Senior Member
welcome to UT
- Thread starter JasonParis
- Start date
Coolstar
Senior Member
NodeGreen11
Active Member
Because the structure for the 2 tracks before and after the station does not need to be separated?
syn
Senior Member
Nah I think I'll go ahead and mention it.
Evil? No. Foolish and hypocritical? Yes.
Can't pretend that work on that project couldn't have simply continued while the DRL South moved forward.
Coolstar
Senior Member
Perhaps so, but we can't just sit here and complain that the RLS was cancelled in favor for the OL for the next decade or so. I don't think that'll bring the RLS back. The OL is moving forward whether we like it or not. Metrolinx definitely needs to be more transparent/specific with theirs plans I will definitely agree with that.
syn
Senior Member
I'm pretty sure nothing we post here has any impact on what decisions the province makes regarding transit.
Steve X
Senior Member
Allocated doesn't mean spent. We will never know how much of the $150m did they spend.
officedweller
Senior Member
Hey! Can I call it or what?
(Okay they're going behind the Costco instead of across the parking lot - but close!)
Good to see side-of-road stations which allow shorter guideways (no mezzanine) and a more human scale.
That was why the hydro RoW was the obvious choice - to provide access to the MSF.
They'll probably rename Science Centre Station and hyphenate "Flemingdon Park - Science Centre".
That's the one that's parallel to the Leaside Bridge, so no real need to.
Likewise the other crossing has the Overlea Bridge.
(Okay they're going behind the Costco instead of across the parking lot - but close!)
Good to see side-of-road stations which allow shorter guideways (no mezzanine) and a more human scale.
That was why the hydro RoW was the obvious choice - to provide access to the MSF.
They'll probably rename Science Centre Station and hyphenate "Flemingdon Park - Science Centre".
That's the one that's parallel to the Leaside Bridge, so no real need to.
Likewise the other crossing has the Overlea Bridge.
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officedweller
Senior Member
Remember that the Environmental Conditions Report showed them examining parcels on both sides of Beth Nealson Drive for the MSF.
This map from the Conditions Report shows the MSF site in black dashed outline.
There could be a shallow valley below the hydro lines to the west of Beth Nealson Dr.
so maybe the guideway could come down and follow the contours.
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officedweller
Senior Member
About the transfer at Eglinton, here's the busiest transfer station in Vancouver
- elevated, walkway across the street, down to grade, then down to the M-Line in the Grandview Cut (i.e. underground).
https://en.wikipedia.org/wiki/Commercial–Broadway_station
- elevated, walkway across the street, down to grade, then down to the M-Line in the Grandview Cut (i.e. underground).
https://en.wikipedia.org/wiki/Commercial–Broadway_station
officedweller
Senior Member
For elevated lines, side platforms are cheaper because the guideway is kept straight.
The curves and single track guideways required for a centre platform add cost.
Correct.
For underground stations, centre platforms are placed between twin bores, so it's sort of a self-contained pit.
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NoahB
Active Member
Heck, even looking at some of the early station layouts, we can already see some red flags in the design that might cause capacity issues on the Ontario Line in the future.
Notice that Eglinton-Don Mills Station (I refuse to call it Science Centre) on the Ontario Line is positioned entirely north of the Eglinton Line. Given this positioning, it's most probable that passengers who are transferring from the Eglinton Line to the Ontario Line will be entering the Ontario Line platform from the south side of the OL platform (this is the side closest to Eglinton Avenue). This is a big deal because it will result in poor load balancing on the OL trains. The south end of the train will be over capacity, while the north end of the train is empty. This means that passengers waiting on the south end of platforms at downstream stations (say, at Throncliffe Park or Pape Station), will be presented with totally full cars, and will be unable to board, despite the north end of the train largely being empty. At best, this will reduce the capacity of the line, as some passengers will not be able to board. At worst, this will reduce the capacity and the headways of the line, as badly behaved passengers hold doors in an attempt to squeeze into stations.
I know this sounds all very academic and nitpicky, but when you're trying to achieve 90s headways, you don't have the luxury of having any stations with poor pedestrian layouts, as this will impact your achievable capacity and headways.
We have a similar situation limiting the capacity of the Yonge Line right here in Toronto. Notice in the below diagram of the Bloor-Yonge station that the Line 2 platforms are at the north side of the Line 1 platforms. This results in passengers transferring from the Bloor Line, to the Yonge Line crowding at the north end of the Yonge Line platform, while the south end remains relatively empty. This causes a load imbalance on the trains, where the north of the train is overcapacity, while the south end is empty (you can see this effect if you watch Yonge Line trains pull into B-Y Station during rush hour). For the same reasons I described above, this culminates in a significant negative impact on the capacity and headways on the Yonge Line.
What this means is that even if the Yonge Line was could run at the 90s headways permissible by the TTC's ATO system, the poor layout of Bloor-Yonge Station alone would make running the trains at this frequency near impossible. And even if they could be run at that frequency, the poor load balancing on the trains would limit the effective capacity of the line, as the northern cars on the train will be over capacity, while the southern end is empty.
View attachment 274918
This highlights one of the reasons why I say 90 second headways, and their theoretically achievable capacities, are very fickle, and should not be depended upon. If those are the frequencies and crowding standards you're designing around, you have zero room to screw around with poorly designed stations and various other factors. It also means that value engineering (which the Ontario Line is susceptible to) could end up throwing away whatever theoretical capacity you thought you had.
For Eglinton-Don Mills Station specifically, Metrolinx needs to be very careful about how they're handling pedestrian distribution within the station. This is going to be one of the three most used stations of the line, so it is important that they encourage passengers to distribute themselves within the trains in the most efficient manner. Unfortunately the early design suggests that they're going to repeat the design mistakes of Bloor-Yonge Station.
I am taking a wait and see approach for the details of the OL. About your comment about crowing on one side: if this line does anything from a modern 'off the shelf' metro line like what the REM is doing, it would have a screen above every PSD that tells you the crowded level at that door within the upcoming train. It also tells you where there are fewer crowds on the train.
So people dont have to be 'smart' about choosing a door. All the need to do is look in front of them.
99Messier
New Member
Thanks Den - you seem to one of the real nice guys here.
micheal_can
Senior Member
To handle the expected future traffic of this line, side platforms allow more people through better. Take a look at some existing centre platforms and you'll see how congested they are.
smallspy
Senior Member
Last I checked, they hadn't actually met those goals. They had attained 36tph for almost 2 hours in the mornings (about one round trip) and 1 hour in the afternoon as of the middle of last year. If they have surpassed that and are achieving 36tph for the full 3 hour peak period, then fantastic.
But that's still not a 90 second headway.
As for automated systems, yeah, I've ridden hundreds, thanks. Extremely few of them operate at a 90 second headway over the whole of the line. It is very difficult to design a stub-ended terminal to allow for that kind of headway, even assuming GoA3 or 4.
Dan