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GO Rail Expansion - On-Corridor Works

Greater Toronto and Hamilton Area
Project Type:
Progressive DBOM - Design Build Operate Maintain
Infrastructure Type:
Contract Value:
Announced after Development Phase

About the Project

The On Corridor Works project is the largest capital infrastructure project in the Province’s historic GO Rail Expansion program. On Corridor work includes all works that facilitate train service, such as track, civil infrastructure, signalling, electrification infrastructure and electric vehicles, as well as the operations and maintenance of the GO rail network.

GO Rail Expansion will transform the transportation network in the Greater Toronto and Hamilton Area over the next decade. Metrolinx will transform the GO Transit rail network into a system that will deliver two-way, all-day service every 15 minutes over core segments of the GO Rail network. System-wide infrastructure upgrades will include: adding tracks, expanding stations, electrification of the rail network, new locomotives and train control systems to enable more frequent service. 


  • Request for Qualifications
    Apr 03, 2018
  • Short-list Bidders Selected
    May 30, 2019
  • Request for Proposals
    May 31, 2019
  • Winning Bidder Selected
    Apr 19, 2022
  • Construction Begins
    Apr 19, 2022
  • Construction Ends

Latest News


The scope of work includes:

  • Operation of train services including train crewing
  • Timetable planning and train control for all operators across the GO-owned network
  • Design, construction and integration, of the railway corridor (civil infrastructure, tracks, systems, signalling etc.)
  • Maintenance and rehabilitation of new railway corridor assets and select existing railway corridor assets
  • Maintenance, servicing and cleaning of all rolling stock and procurement of new rolling stock
  • Construction of new maintenance and train storage and/or layover facilities
  • Reconstruction of Union Station track and platforms
  • Compliance with Metrolinx safety, security and emergency management policies


  • Reduced traffic congestion, greenhouse gases and fuel consumption
  • Improved quality of life for commuters by reducing daily travel time
  • Design and construction of the project will generate employment opportunities and produce significant benefits for commuters.

Demonstrating Value

  • The On-Corridor Works project is being delivered using a Progressive DBOM model. Key features of a Progressive DBOM model include the opportunity for development partners and owners to work more collaboratively to refine design, optimize schedule, reduce risk and finalize pricing before construction.
  • Learn more about IO’s delivery models and the associated features.

Terms of Use

These project documents are being made available on this website for informational purposes only. Neither Infrastructure Ontario nor Metrolinx makes any representation or warranty regarding the accuracy or completeness of the content or form of these documents.

Infrastructure Ontario and Metrolinx, in their sole and absolute discretion, may choose to make available on this website amendments, revisions, modifications or replacements to these documents. These documents remain open for further revision, modification, replacement or cancellation by Infrastructure Ontario and Metrolinx at any time and in no event shall either Infrastructure Ontario or Metrolinx be responsible or liable, directly or indirectly, for any damage or loss caused or alleged to be caused by or in connection with the use of or reliance on the content of these documents.