The Scarborough Subway Extension (SSE) extends Line 2 (Bloor-Danforth) by 7.8 kilometres from Kennedy Station to a new terminus at Sheppard Avenue East and McCowan Road.

For more information about the project, or to find information about past and future public engagement, please visit Metrolinx’s Scarborough Subway Extension project page.

The SSE is an initiative under the Metrolinx-led Subway Program. The SSE will run below grade and consists of three stations at Lawrence Avenue and McCowan Road, Scarborough Centre, and Sheppard Avenue and McCowan Road.

The SSE is being built under two separate public-private partnership (P3) contracts:

  1. Advanced Tunnel contract for the design and construction of a 10.7 metre diameter tunnel, including tunneling via a Tunnel Boring Machine (TBM), construction of the launch and extraction shaft, headwall construction, and some utility works.
  2. Stations, Rail and Systems contract which includes stations and associated bus terminal facilities, and activities to integrate the SSE integration with TTC infrastructure at Kennedy Station.

Once complete, this project will be operated as a seamless extension to the existing Line 2 subway.


A map depicting the 3 station stops of the Scarborough Subway Extension that extends Line 2 (Bloor-Danforth) from Kennedy Station to a new terminus at Sheppard Avenue East and McCowan Road.
Click on image to enlarge it.


Construction of the SSE is currently underway. The Advance Tunnel contract was awarded to Strabag in May 2021 to design, build and finance the tunnel for the SSE. Construction began in June 2021 to initiate preparatory works for the launch shaft site for the TBM. On January 11, 2023, the TBM commenced tunneling from the launch site at Sheppard Avenue and McCowan Road to dig approximately 6.9 kilometres of tunnel along the SSE alignment.

In September 2021, Metrolinx and Infrastructure Ontario (IO) released a Request for Qualifications (RFQ) to identify teams interested in designing and building the Stations, Rail and Systems (SRS) package of work. A shortlist of qualified proponents were invited to participate in the Request For Proposals (RFP) process on February 9, 2022. On November 30, 2022, the RFP for the SRS contract was awarded to Scarborough Transit Connect (STC) and work is underway to review existing design plans with STC and prepare for construction implementation.

Other Key Project Milestones include: