GO Expansion – On-Corridor Works
Province: Ontario
City/Region: Greater Toronto-Hamilton Area
Image Credit: Metrolinx
3
Project Rank
Project End: 2032
Project Type: Rail
Industry Sector: Transit
Project Amount: $15.705 billion
Date of Completion: 2032
Funding Source: P3
Provincial Funding: Allotment to Metrolinx: $15.705 billion
LEED Status: Certified
Previous Rankings
| 2025 | 2 |
| 2024 | 2 |
| 2023 | 2 |
| 2022 | 2 |
| 2021 | 1 |
| 2020 | 1 |
| 2026 | 3 |
About The Project
As On-Corridor Works is a complex regional project with multiple external interfaces, stakeholders, utility and operational elements, it is being delivered as a Progressive DBOM (design-build-operate-maintain) model. In a Progressive model, the project features a collaborative approach between the project owner and the contracting partner. In the Spring of 2022, Metrolinx and Infrastructure Ontario (IO) executed an agreement with ONxpress Transportation Partners to enter the Development Phase of the On-Corridor Works project—the largest project in Metrolinx’s GO Rail Expansion program. Unprecedented in its scale and complexity, this multi-billion-dollar capital program will transform the regional rail network with electrification, more frequent service, shorter journey times and a more modernized system for the Greater Toronto and Hamilton Region.
Project Owner: Metrolinx
Project/Construction Manager: Procurement Agent: Infrastructure Ontario
P3 Team Members/Project Team: ONxpress Transportation Partners Systems and Integration Team: ALSTOM Transport Canada Inc. Construction, Design and Engineering Team: Aecon Infrastructure Management Inc., ALSTOM Transport Canada Inc., FCC Construccion S.A., WSP, Hatch Fixed Infrastructure Maintenance Team: Deutsche Bahn International Operations GmbH, Aecon O&M, a division of Aecon Construction Group Inc. Operator Team: Deutsche Bahn International Operations GmbH, Aecon O&M, a division of Aecon Construction Group Inc.
Other Key Players: Stantec (planning and envrionmental engineer); Wood (WSP) (consulting engineer/geotechnical studies/environmental assessment); Dillon Consulting (architectural services); Golder (WSP) (geotechnical studies); EY (mgmt. consultant); Deloitte (mgmt. consultant); Accenture (project manager); Entuitive; Parsons (consulting engineer); Turner & Townsend (project controls); AECOM (consulting engineer); Arup (engineer); SEMP Ltd. (consulting engineer); TULLOCH; GHD (engineer-design); Accuracy (management consultant); Egis; E.S. Fox; HKA (risk advisor); INTECH (risk advisor); KPMG; LRI Engineering; Marsh Canada (risk advisor)
Legal: Borden Ladner Gervais (for the owner); McMillan LLP (ONxpress); Stikeman Elliott
Key Players
Key Players’ recognize the organizations whose work, knowledge, and expertise go into constructing and delivering the significant projects that make our annual list.
Gold (15-19 Projects)
Silver (10-14 Projects)
Bronze (5-9 Projects)
- ACCIONA Infrastructure Canada
- Accuracy
- Alstom
- Associated Engineering
- Black & McDonald
- Blake, Cassels & Graydon
- Cartel Communication Systems
- COWI
- Davies Ward Phillips & Vineberg
- DECAST Ltd.
- DIALOG
- EBC Inc.
- FlatironDragados
- GeoVerra
- HDR
- Hemmera
- Infrata
- Kasian
- Lakeland Consulting Inc.
- Lavery, de Billy
- LRI Engineering
- McMillan LLP
- Montrose Environmental
- Mott MacDonald
- Mulvey & Banani
- NORR Architects & Engineers Ltd.
- Osler
- Parkin Architects Ltd.
- Plenary Americas
- R.V. Anderson
- STRABAG Inc.
- Tiree
- Torys

