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Ask a Question - Scarborough Subway Extension - Spring/Summer 2020

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Anonymous's avatar
Mar 11, 2020 - 12:48

Is budgeting for the subway include the temporary bus linkages from STC to Kennedy station including removal of the LRT track and stations?

Metrolinx's avatar

Mar 13, 2020 - 14:59

Thanks for your question. The temporary bus linkages and the removal and de-commissioning of SRT line is included in the estimate for the Scarborough Subway Extension

Anonymous's avatar

Mar 15, 2020 - 09:14

I prefer the LRT vs subway. First less $$$ second less time to build & get into service.

Metrolinx's avatar

Mar 23, 2020 - 09:23

Hi, thanks for your feedback. We acknowledge that there have been many discussions on how to improve rapid transit in Scarborough over the years, and now we are moving forward with a solution. That solution is the three-stop subway extension that was announced in the 2019 budget. The three-stop extension will provide seamless travel for Scarborough residents heading into and out of the downtown core by eliminating the need to transfer at Kennedy Station. There are proposed stops at Lawrence Avenue and McCowan Road, Scarborough Centre and McCowan Road and Sheppard Avenue.

Anonymous's avatar
Mar 15, 2020 - 09:41

Does the Scarborough Subway Extension include spaces for a potential future interlining opportunity with the Sheppard Line 4 Extension? Such as a trun to the CP corridor after the Sheppard-McCowan station, then heading southwest back on Sheppard at around Brimley. This way going to STC from line 4 will have a one-seat ride.

Metrolinx's avatar

Mar 23, 2020 - 09:28

Thanks for your question. We are planning and designing the Sheppard station with the proposed Sheppard Line extension in mind. Our design will be updated as more information about that line becomes available in the future.

Anonymous's avatar
Mar 28, 2020 - 14:29

Has Metrolinx considered using cut-and-cover from Kennedy Station to STC, or at least portions of it?

The key is bridging over Highland Creek North of Lawrence, similar to what was done for the Sheppard Line over the East Don River.

Cut-and-cover has significantly lower construction costs than tunneling (TBM). It is also a faster method as it allows construction to commence at several locations, including starting station construction prior to completion of line structures. It is technologically simpler, allowing more contractors the ability to do the work. In the final configuration, it is also more convenient as the time from street to platform is lower.

Metrolinx's avatar
Dec 1, 2020 - 16:06

Thank you for your question. You are correct, station construction is typically delivered through the cut and cover method.

As you may already be aware, Metrolinx and Infrastructure Ontario have already begun procurement activities. To keep the project moving forward as quickly as possible, tunnelling will begin first.

We are aiming to begin tunnel construction as early as next year and construction for all other aspects in spring 2023. A separate contract for the project will be issued in the future for building the stations, fitting out the tunnel and installing and commissioning the systems to put the subway in service.

As part of that contract, Metrolinx will prescribe the requirements for building stations, however the means and methods of construction to deliver what is required is up to the winning bidder(s).

Anonymous's avatar
Mar 28, 2020 - 14:43

Has consideration been given to extending the B-D Line to Finch?

TBM Launch site could be 500-600m north of Sheppard in the CPR Rail yard, a very nominal distance. This results in less traffic disruption at McCowan/Sheppard as the excavation in the "middle of the road" only involves station excavation, and not managing spoils as well. This short extension would not require any additional emergency exits, would allow cross-over and pocket tracks to be built in "open-air" in the CPR yard, instead of in the "middle of the road". The line could be extended to Finch roughly parallel to the CPR Rail tracks, either with cut-and-cover, trenched, or at-grade construction. This would open up more development potential at Finch and allow some relief to the Finch East buses.

Anonymous's avatar
Apr 3, 2020 - 11:22

why couldn't there be a 4th station at Eglinton and at Brimley Rd or Danforth Ave to serve the communities on Eglinton East?

Metrolinx's avatar
Nov 23, 2020 - 13:30

The recently updated 2020 Scarborough Subway Extension Environmental Project Report (EPR) addendum was completed to address the changes to the 2017 EPR by the City of Toronto and TTC, to reflect the 2019 announcement by the Government of Ontario to oversee the project and extend TTC’s Line 2 subway service nearly eight kilometres further into Scarborough. At that time Metrolinx received clear direction in the provincial budget about where the location of the stations and the project has been optimized to fit within its ~$5.5B budget.

The addition of a fourth station stop was considered and studied prior to the release of the Addendum. However, the station would come with fairly significant costs as it would require a large bus terminal to accommodate the volume of bus routes that would need to terminate at this location.  The station construction would be further complicated due to the requirement for a turn-back and storage track that would also need to be built.  These are just a few of the additional costs that would result in the project going way over budget.

Also, much of the ridership for the extension comes from people transferring from bus routes, rather than individuals walking into stations directly.   The stations at Sheppard, Scarborough Centre (Ellesmere) and Lawrence are located to facilitate connections from the key East-West bus corridors in Scarborough.   

Anonymous's avatar

All decision makers agree that Scarborough (STC) needs a transfer free connection to the heart of the City - but does it need to be an extension of the Bloor-Danforth subway. To a large degree, the B-D misses the downtown, and still force many to transfer at Yonge-Bloor station - the busiest on the network and the one that dictates all train frequencies.

So build a whole new line, and use the same trains as proposed for the Ontario Line. Here's how it goes (to allow the SRT to stay in operation during construction):
1) Elevated, build along Town-Centre Court and Golden Gate Court. Curve down at Highland Creek to Ellesmere.
2) Continue along Ellesmere (north side) to Victoria Park. Down Victoria Park to Gatineau Hydro Corridor, with interchange at Bermondsay Stop.
3) Along the hydro corridor, continue west across Don River and DVP to St. Dennis Road.
4) Past Science Centre to Beth Nealson Drive (with connection to train yard).
5) Down beside Costco and join in to Overlea Boulevard.
6) At Overlea Blvd. and Thorncliffe, this line would connect in with the Ontario Line (which came down from Don Mills/Eglinton to Overlea Blvd. and across). Thorncliffe Station would have 4 track/2 platforms (for future cross platform transfer between lines).
7) As an interim measure, this would interline with the Ontario Line (i.e. go along Overlead Blvd. a bit, then cross the Don River with a high level bridge and join up with Pape).
8) There is future opportunity for a train yard at/near the North Toronto Wastewater Treatment Plant.
9) Future extension of this line would remove the interlining, and find it's own way downtown through Don Valley. Going roughly parallel to the Richmond Hill GO line to Bloor, interchanging at Castle Frank Station, and finally going underground along Parliament Street to King Street, and west along King St.

With the STC to Thorncliffe portion being entirely elevated, it can be built at about 1/3 the cost of the proposed TBM. It would result in 9 new stations (STC, Brimley, Ellesmere/GO, Birchmount, Warden, Vic Park, Lawrence, Eglinton/Bermondsay, Flemingdon), 8 in Scarborough, at a cost similar to the tunneled B-D subway plan. It completely relieves Yonge-Bloor Station. It allows for future expansion south (to downtown) and west (to Malvern or UTSC). It also allows for SRT to remain in operation during construction.

If we remember that the goal is a rapid, grade-separated connection to the core of the city, then we can open our eyes and find a better way of finding a solution to the problem.

Anonymous's avatar

May 2, 2020 - 14:50

There seems to be 2 options for designing this extension.
1) Design-Bid-Build (DBB). Metrolinx gets their consultant to do all investigations and does all aspects of the design, including construction specifications. The project is then tendered to either one of several contractors. This is generally a bit less expensive of a method, but takes a bit longer in total design and construction time.
2) Design-Build (D-B). Metrolinx does enough investigation to get a reasonable idea of the design, and leaves the detail design to the Contractor. The initial design must include precise requirements for the design by the Contractor, and construction specifications as well. The idea is that the Contractor can adjust detail design so that they may find efficiencies. Variant of this method include Design-Build-Operate and with Finance (BDOF, or P3)added as well - which really accomplish the same thing from a construction and engineering point of view, but slightly different ways of paying for it. This method is usually a bit more expensive, as the Contractor has more uncertainty with an unfinished design (for which they add extra costs). The only opportunity for cost savings is if the contractor can do some type of re-design to better suit their operations, and this savings exceeds the uncertainty premium. Also, this is a bit faster as some design is done concurrent with construction.

About the worst option is to pick something in-between. Let's say the tunneling is given as a separate contract. Now the Contractor has lost a huge ability to find innovation. With full B-D, they could have altered the tunneling methods to suit there construction methods - either switching from single bore to double bore tunnel (or vice versa), or excavating portions of the line, or changing vertical alignment to reduce station (and emergency exit) costs, or any number of other means. Putting the tunnel as a separate contract completely takes away from any advantage a D-B contractor would have had - and the entire thing should have go DBB if this is considered.

Let's hope Metrolinx does not repeat the same mistake it made on the Eglinton line, where the tunnel was done first and the prevented the future contractors from making significant improvements. So please pick a lane. DBB or DB.

Anonymous's avatar
May 15, 2020 - 11:00

Will you guys still be on track to complete this project as planned or has this Extension project been affected by the coronavirus outbreak?

Metrolinx's avatar
Nov 23, 2020 - 14:07

Thank you for your question. At this time the schedule for the Scarborough Subway Extension project remains unchanged. To stay up to date on this project, I encourage you to subscribe to the Toronto East newsletter here.

Daniel's avatar
May 15, 2020 - 13:05

Will the project include Automatic Train Control? Thanks!

Metrolinx's avatar
Dec 1, 2020 - 09:04

Thank you for your question. Automatic Train Control (ATC) is being protected for, however, the extension will be designed and built to the existing fixed block system.

Anonymous's avatar
Jun 8, 2020 - 13:20

I noticed that much of the Ontario Line will be above ground to save money. Wouldn't elevating part of the Extension--including the option of reusing the RT right of way and building a subway-car-compatible overhead or underground curve at Ellesmere--reduce expenses, minimize disruption, and result in a faster completion time?

Metrolinx's avatar
Nov 23, 2020 - 14:04

Thank you for your suggestion. This project was studied and designed as an extension of the existing Line 2. Details of the project were informed by previous studies, and the preferred solution was the three-stop extension announced by the Government of Ontario in 2019.

Anonymous's avatar
Jul 29, 2020 - 19:58

What would the Lawrence East Bus Terminal look like and what would the Sheppard East bus terminal look like?

Metrolinx's avatar

Thank you for your question. Through the TPAP process, the station footprints were identified, however, design and layout of the stations will be further progressed once the Stations, Rail and Systems contract is awarded.

More details about how the Scarborough Subway Extension will be procured, and the different procurement packages, can be found here: 


Anonymous's avatar

For Lawrence East Station, 16 McCowan, 54 Lawrence East and 954 Lawrence East Express

For Sheppard East Station, 85 Sheppard, 129 McCowan North, 130 Middle Field, 131 Nugget, 132 Mclevin, 169 Huntingwood, 939 Finch East Express, 985 Sheppard Express

Will these route connect to these new stations?

Metrolinx's avatar

Thank you for your question. There will be local TTC bus connections at every station along the extension. However, more detailed information about routes and schedules will be released by the TTC in the future. 

Anonymous's avatar
Aug 17, 2020 - 00:58

Instead of reusing "Lawrence East" as a station name for the SSE, would Metrolinx and the TTC consider incorporating "Bendale" into the name of the new station at Lawrence and McCowan, recognizing the Scarborough neighbourhood that it will be in the heart of?

Bendale Station sounds great!

Metrolinx's avatar
Nov 23, 2020 - 13:35

Thank you for your feedback and the great suggestion. The names currently being used to reference the stations are not final. There will be an opportunity in the future for the community to provide input on station names.

Anonymous's avatar

Aug 28, 2020 - 21:39

It states in the header that the target for answers will to provide them in 48 hours.
There are some from March that have yet to be answered.
You do realize that it is now over 3600 hours. You missed your target by about 7500%.

Anonymous's avatar
Sep 30, 2020 - 10:47

They should continue boring westward once they hit Sheppard to finish the connection with the sheppard line. If the shovels are already in the ground what are we waiting for?

Metrolinx's avatar
Dec 1, 2020 - 16:22

Thank you for your suggestion. The Scarborough Subway Extension will protect for future expansion considerations by space proofing for a future Line 4 Extension (Sheppard Subway) and provisioning for future passenger transfer between Line 4 and Line 2 at the station located at McCowan Road and Sheppard Avenue. However, future expansion will not happen until completion of the Scarborough extension.

Anonymous's avatar

Oct 21, 2020 - 01:03

Why can't you guys just transform the scarborough rt into a subway line and make each of the current stations wheelchair accessible instead of starting from scratch on a new subway line and stations.

Metrolinx's avatar

Dec 1, 2020 - 09:12

Thank you for your suggestion. The Scarborough Subway Extension will provide a seamless connection at Kennedy Station, allowing customers to avoid the transfer between Line 3 and Line 2 they experience today.

The extension also provides a station north of Highway 401 at Sheppard, meaning customers from the northern parts of Scarborough will spend less time on buses.  It also means fewer buses on the road as they will be able to terminate at Sheppard and McCowan instead of Scarborough Centre.

By extending Line 2 further into Scarborough, you’ll also be able to make connections to other major transit projects being planned and delivered like the Crosstown at Kennedy, the proposed Ontario Line at Pape, the proposed Durham-Scarborough Bus Rapid Transit at Scarborough Centre and increased GO train service at Kennedy and Danforth stations.

Anonymous's avatar

when will Metrolinx ever begin the project?

Metrolinx's avatar
Nov 19, 2020 - 12:26

We are aiming to begin tunnel construction as early as 2021 and construction for all other aspects in 2023.

Anonymous's avatar
Dec 5, 2020 - 15:18

Consider moving TBM Launch site 500-600m north of Sheppard in the CPR Rail yard, a very nominal extra distance.

This results in less traffic disruption at McCowan/Sheppard as the excavation in the "middle of the road" only involves station excavation, and not managing spoils as well. This short extension would not require any additional emergency exits, would allow cross-over and pocket tracks to be built in "open-air" in the CPR yard (instead of in the "middle of the road").
The line could be extended to Finch roughly parallel to the CPR Rail tracks, either with cut-and-cover, trenched, or at-grade construction. This would open up more development potential at Finch and allow some relief and counter-flow to the Finch East buses.

Anonymous's avatar

Another big negative of TBM construction is that no work can be done concurrent with the tunneling. (the main negative of TBM being the necessity of deep lines which result in exceedingly expensive (and time consuming to construct) cut-and-cover station). There is essentially a 2 year gap where nothing is being done on the stations - which are the most complicated part of the construction. If cut and cover were utilized, multiple construction activities could be done at the same time.
1) The first segment could be from Kennedy Station to McCowan. (with shallow, cut-and-cover construction, a station at Brimley may become feasible).
2) The next segment could be from McCowan/Eglinton to Lawrence Station.
3) The Highland Creek Bridge could be the next segment.
4) The next segment would be Highland Creek to STC station.
5) A Short TBM segment is needed to go under 401 from STC to just north of Sheppard.

With this methodology, station construction at (optional) Brimley, Lawrence, and STC can begin almost immediately, concurrent with the linear that is being constructed with conventional means. Many local contractors can do cut and cover, and similarly created precast tunnel liners, so the work would be fast and well priced.
It would only be Sheppard Station that has to wait for the tunneling to be completed - which also opens the possibility of having an interim opening of (B-D) Line 2 in phases.

Anonymous's avatar
Dec 9, 2020 - 07:10

Will this extension be underground or elevated

Metrolinx's avatar
Dec 17, 2020 - 14:45

Thank you for your question. The entire extension will be underground. It is an extension of the existing Line 2 subway.