[NoahB]

In other jurisdictions, they use both directions on the same track in case of problems such as breakdowns or injuries. Using the crossovers to switch around the obstruction. Can't see that happening in Toronto because that would be too complex of an operation for us.

I remember reading that Ottawa's LRT is designed for 15min single track service in case one of the tracks can't be used. I can't seem to find it though. I don't know if the crosstown has anything similar. It does have many crossovers though.
Images here:

http://www.thecrosstown.ca/sites/default/files/images/alignment_map_w_storage_track.jpg

 

[KevinT]

So let's say a train breaks down, will there be enough switches/a system in place to allow for other trains to kinda simply go around it, do you reckon?

Ion has occasionally 'reverse run' through a section while in service to deal with a blockage, but it doesn't happen often. Typically they'll bustitute instead, which takes forever for them to get started. :-(

 

[Monarch Butterfly]

Ion has occasionally 'reverse run' through a section while in service to deal with a blockage, but it doesn't happen often. Typically they'll bustitute instead, which takes forever for them to get started. :-(

Wish the TTC could use single-track bypass operations on Line 1 or 2. Need more crossovers tracks unfortunately. Maybe by the 22nd century.

 

[H4F33Z]

Wish the TTC could use single-track bypass operations on Line 1 or 2. Need more crossovers tracks unfortunately. Maybe by the 22nd century.

I checked my browser history. I frequent the TTC website quite often. From April 27-30, The TTC was doing some track maintenance on one piece of the track somewhere in the Vaughan section. This meant that the ttc operated 15 minute frequency both ways from pioneer village to VMC by using a single track only. The page is now long gone. But I swear.

 

[mdu]

I checked my browser history. I frequent the TTC website quite often. From April 27-30, The TTC was doing some track maintenance on one piece of the track somewhere in the Vaughan section. This meant that the ttc operated 15 minute frequency both ways from pioneer village to VMC by using a single track only. The page is now long gone. But I swear.

Line 1: Vaughan Metropolitan Centre to Pioneer Village single-track operation April 27 to 30

The Toronto Transit Commission is the quick, convenient and safe way to get around Toronto. The subway system is linked with buses and streetcars to get you around Toronto on one fare, provided it's a one-way trip with no stopovers. You can travel on the TTC every day.

web.archive.org

Here!

 

[KevinT]

Wish the TTC could use single-track bypass operations on Line 1 or 2. Need more crossovers tracks unfortunately. Maybe by the 22nd century.

I seem to recall someone else in the know (@smallspy perhaps?) saying that they couldn't turn off the power to just one track or the other in the subway, apparently it was never built that way.

 

[Steve X]

I seem to recall someone else in the know (@smallspy perhaps?) saying that they couldn't turn off the power to just one track or the other in the subway, apparently it was never built that way.

If it's just a mechanical issue or emergency alarm, they wouldn't have to turn power off. If it's a track fire, it might not be right to keep running trains in the other direction either. It's not right to continue running trains while there is a priority one on the other side of the platform.

I would say how the issues wouldn't matter if they couldn't turn off power on one side.

 

[smallspy]

I seem to recall someone else in the know (@smallspy perhaps?) saying that they couldn't turn off the power to just one track or the other in the subway, apparently it was never built that way.

That is correct for the vast majority of the system as it was built. In fact, there were relatively few power cut districts, and so an emergency cut of power would knock out a relatively large area.

This is not the case, however, for the TYSSE. The power district configuration is fine-grained enough to be able to cut power to just one track, and an emergency power cut will only affect one station. That is why they were able to do trackwork on one track, but still run revenue service on the other.

The rest of the system will be upgraded to this spec over time, and some aspects of it are already in place. But to the best of my knowledge it will not be possible to cut the power to just one track in the cut-and-covered sections of tunnel.

Dan

 

[syn]

Better to design it properly from the start than try to fix a bad design years down the road.

From the same video that NoahB linked, this is how the Eglinton surface section should have been designed. No red lights and much faster travel times. It's a vastly different riding experience compared to a streetcar that stops at red lights.

Agreed. My point is that it's not an insurmountable problem with a relatively easy fix if it's not delivering at least expected results.

 

[Coolstar]

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[Streety McCarface]

Agreed. My point is that it's not an insurmountable problem with a relatively easy fix if it's not delivering at least expected results.

Except it's not as easy of a fix as you propose, at least, in the case of the design @MisterF proposed. You'd likely have to shut down numerous intersections for weeks to months at a time to realign them and install barriers. Traffic signals would also have to be replaced. There's also the issue of installing a signaling system that triggers the barriers. You're looking at a few hundred million dollars for every single intersection.

 

[Streety McCarface]

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So
Much
Wasted
Space

 

[daptive]

So
Much
Wasted
Space

How much larger are heavy rail subway tunnels versus LRT tunnels?

 

[crs1026]

^ Much as the clearances seem ample, I’m intrigued that the first vehicle didn’t have any of the clearance-checking styrofoam and cameras that we saw for first vehicles through the KW and TYSSE projects. They may be doing that with some other test rig, or this was truly a “symbollic” passage.

This may be more of an opening of test track for vehicle burnin than a real project milestone, but it’s certainly good to see.

- Paul

 

[Streety McCarface]

How much larger are heavy rail subway tunnels versus LRT tunnels?

They're smaller — the ID of the crosstown's tunnels is 5.75 m, while the ID of the TYSSE's was 5.4 m, and the ID of the Sheppard Subway tunnels was 5.2m because the tunnels were relatively straight.