Infrastructure Ontario (IO) and Metrolinx have closed the Request for Proposals (RFP) for the Yonge North Subway Extension (YNSE) – Stations, Rail and Systems (SRS) contract in Ontario, Canada.

The RFP closed on August 28, 2026, with shortlisted teams submitting proposals for three work packages: Underground Works, Surface Works, and Design and Systems Integration. The Yonge North Subway Extension will extend the TTC’s Line 1 subway service approximately eight kilometres from the existing terminus at Finch Station to Vaughan, Markham and Richmond Hill with five new stations. 

The YNSE SRS contract is being delivered through an owner‑formed Alliance procurement model and comprises three distinct work packages: Underground Works, Surface Works, and Design and Systems Integration. For each of the three packages, the following teams have submitted their proposals by the deadline:  

1. for Underground Works:
   • Trillium Construction Partners - Acciona Infrastructure Canada Inc., Amico Infrastructures Inc.
   • NorthLine Partners - Flatiron Dragados Canada, Inc., Green Infrastructure Partners Inc.
   • CrossTransit Group - Ferrovial Construction Canada Inc., VINCI Construction Grands Projets Canada Inc.
   • North Extension Transit Alliance (NExTA) - Aecon Infrastructure Management Inc., Formento de Construcciones y Contratas Canada Ltd., Pomerleau Major Projects Inc.
2. for Surface Works:
   • Kenaidan Murphy Joint Venture (KMJV) - Kenaidan Infrastructure Ltd., Murphy Infrastructure Inc.
   • NorthLine Partners - Flatiron Dragados Canada, Inc., Green Infrastructure Partners Inc.
   • North Extension Transit Alliance (NExTA) - Aecon Infrastructure Management Inc., Formento de Construcciones y Contratas Canada Ltd., Pomerleau Major Projects Inc.
   • True North Corridor Alliance - Bird Construction Industrial Services Ltd., Ledcor Ontario Infrastructure Ltd.
3. for Design and Systems Integration:
   • NorthOne Integration Partner - Arup Canada Ind., Hatch Ltd., Egis Canada Ltd.
   • NovaNorth - AtkinsRéalis Canada Inc., CIMA Canada Inc., NORR Architects & Engineers Limited.
   • WSP-AECOM - AECOM Canada ULC, WSP Canada Inc.

One team from each package of work will be selected to enter into a Project Alliance Agreement with Metrolinx, forming the Alliance. The successful proponents are expected to be announced in 2027. During the Alliance Development Phase, the partners will work together to refine the design and undertake early investigations and works. At the end of this phase, Metrolinx will have the option to accept a proposal confirming the final design, cost and schedule for the Project.