[Bordercollie]

It’s an embarrassment of a city of this size that we can’t as a TTC maintain 2 subway lines to normal operating speed. I can’t understand why the same piece of track keeps continuously getting slow orders. Is there something fundamentally wrong with the track that they can’t fix right the first time. The speed of travel on line 1 is significantly slower and our whole system can barely be considered rapid transit. There is nothing rapid about it. The lack of pride in operating a system to our own standards is just a sad reflection of how badly this city is rotting under the past and current leadership.

Is there any hope that this situation will get any better?

Davisville was built on an old landfill. The ground is sinking there. To remedy it they need to dig down to the bedrock to stop the track from moving. It would require the line to be closed for an extended period of time.

What they should do extend the yard stub track by tearing down the bridge that it stops at. By putting that track Into service would allow bi directional travel while they fix one track at a time.

But south of the platform doesn't have a potential solution like that. Redoing all the ballast would provide some interim relief but I'm not sure if they could do it in a weekend closure.

As for Rosedale does anyone know what the issue is?

 

[txlseries4]

For all the flack the TTC has received lately I don't think I saw it mentioned they provided free service for NYE last night from 7pm to 8am despite the funding sponsor pulling out last minute.

 

[DSCToronto]

It’s an embarrassment of a city of this size that we can’t as a TTC maintain 2 subway lines to normal operating speed. I can’t understand why the same piece of track keeps continuously getting slow orders. Is there something fundamentally wrong with the track that they can’t fix right the first time. The speed of travel on line 1 is significantly slower and our whole system can barely be considered rapid transit. There is nothing rapid about it. The lack of pride in operating a system to our own standards is just a sad reflection of how badly this city is rotting under the past and current leadership.

Is there any hope that this situation will get any better?

As has been discussed here many times,, politicians love having ceremonies to show off new vehicles or new stations and then claim credit for them. There is less credit (and few ribbon cuttings) to be had for replacing a section of track or unblocking a drain so politicians tend to provide less money for these (somewhat) hidden things. Preventative Maintenance (in transit systems, buildings or ones own home) is the gold standard but it is hard to get through to people that NOT having a flood is a good thing and worth paying for and that it is FAR better than being able to repair a broken pipe that shut the system for days!

 

[urbanclient]

That's assuming that trains travel at that speed. I have noticed them going slower than that.

Seconded, it's all fine and dandy to read off the TTC website and claim "the slow zones are exactly X km/hr! You don't understand!"

In reality, as many subway riders will tell you, the subway is almost always slower. Not just slower than what the RSZ webpage would have you think, but much slower than the Google Maps / Service Summary advertised time as well. https://www.ttc.ca/riding-the-ttc/Updates/Reduced-Speed-Zones

 

[turbanplanner]

Davisville was built on an old landfill. The ground is sinking there. To remedy it they need to dig down to the bedrock to stop the track from moving. It would require the line to be closed for an extended period of time.

What they should do extend the yard stub track by tearing down the bridge that it stops at. By putting that track Into service would allow bi directional travel while they fix one track at a time.

But south of the platform doesn't have a potential solution like that. Redoing all the ballast would provide some interim relief but I'm not sure if they could do it in a weekend closure.

As for Rosedale does anyone know what the issue is?

I’m not an engineer but can you dig up one side to the bed rock without affecting the other tracks?

 

[Bordercollie]

I stand corrected, Davisville was built on a ravine that was filled in to build the subway. Greenwood was a garbage dump.

 

[nfitz]

I’m not an engineer but can you dig up one side to the bed rock without affecting the other tracks?

You wouldn't dig, but likely drive piles or install caissons. But I don't see you do that with a live track next to you, given some of the accidents that have happened in the past with drilling equipment falling.

I wonder if some kind of grout injection system might work - thinking outside of the box; but I haven't seen it in unconsolidated soils before - and I'm not that kind of engineer.

 

[Bordercollie]

You wouldn't dig, but likely drive piles or install caissons. But I don't see you do that with a live track next to you, given some of the accidents that have happened in the past with drilling equipment falling.

I wonder if some kind of grout injection system might work - thinking outside of the box; but I haven't seen it in unconsolidated soils before - and I'm not that kind of engineer.

Yeah, none of that is going to happen so that section will always have slow orders no matter how many times they fix the track.

 

[urbanclient]

Yeah, none of that is going to happen so that section will always have slow orders no matter how many times they fix the track.

Doing the same thing over and over again, but expecting a different result: Canadian bureaucracy everyone...

 

[Bordercollie]

Doing the same thing over and over again, but expecting a different result: Canadian bureaucracy everyone...

Yup. They don't even have the operating capital to run the system as is, you think they have capital to fix huge issues like this? Leslie stations ceiling has been leaking for ten years. They didn't even bother to finish fixing it.

Queens park has been under construction for over two years and they made no progress.

 

[nfitz]

Yeah, none of that is going to happen so that section will always have slow orders no matter how many times they fix the track.

I wonder if a slightly angled caisson from a bit further away from the track would work.

Anyhow, there's lots of ways of fixing it without significant interruptions, if they wanted to throw enough money at it. You could build a temporary diversion along the west perimeter. You could build a permanent diversion (perhaps including a tunnel and new station at Davisville. You could even mine underneath the existing track, to build a new structure, and underpin the existing track.

Whether it's worth it or not I don't know - though I'm not sure that a temporary diversion to the west would be overly expensive, particularly if it's tied in with something like redeveloping Davisville Yard into a TOC or something that would monetize it.

 

[Bordercollie]

I wonder if a slightly angled caisson from a bit further away from the track would work.

Anyhow, there's lots of ways of fixing it without significant interruptions, if they wanted to throw enough money at it. You could build a temporary diversion along the west perimeter. You could build a permanent diversion (perhaps including a tunnel and new station at Davisville. You could even mine underneath the existing track, to build a new structure, and underpin the existing track.

Whether it's worth it or not I don't know - though I'm not sure that a temporary diversion to the west would be overly expensive, particularly if it's tied in with something like redeveloping Davisville Yard into a TOC or something that would monetize it.

I'm sure that the air rights are worth a ton.

I think it you carve out the embankments and make them straight you could create more space to move both tracks. Then you could dig down and stabilize the ballast or drive pillars into the ground.

 

[JasonParis]

Yes, I think this is most likely to happen in conjunction with whatever is proposed for the air rights.

 

[Metroscapes]

Did anyone catch this release yesterday? I actually really like it, it sheds a light on all the decision-making and thought behind operations and maintenance. Maybe something we could use down at Queens Quay?

 

[rbt]

I’m not an engineer but can you dig up one side to the bed rock without affecting the other tracks?

It would be very hard [expensive] to repair with only weekend outages.

They'll hold it until the Ontario Line (and Eglinton) have been open and running well for a year then schedule an 8 to 12 week outage for that section of Yonge.