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Infrastructure Ontario and Metrolinx have awarded the contract to design, build and finance the Stouffville Corridor Stations Improvement project to EllisDon Transit Infrastructure (EDTI). The contract has a fixed price of CAD254.5 million (US$198.5 million). 

Stouffville is one of the seven train lines of the GO Transit system in the Greater Toronto Area, Ontario, Canada. It connects Toronto to Whitchurch-Stouffville, approximately 50km north. 

The project includes upgrades to tracks, platforms with canopies, new pedestrian connections and amenities at the Milliken, Agincourt, and Unionville GO stations along the Stouffville Corridor. The project also includes a road/rail grade separation at Steeles Avenue, with a railway overpass bridge.

The tender for the project was launched with a Request for Qualifications in July 2016. EDTI was shortlisted along with two other teams in September 2016, and invited to respond to the Request for Proposals until 8 September 2017.

EDTI will commence design in March 2018, with construction beginning in September 2018 and substantial completion expected by December 2020.

Members of the EDTI team include:

• Applicant Lead: EllisDon Capital Inc.
• Construction: EllisDon Civil Ltd.
• Design: WSP / MMM
• Financial Advisor: EllisDon Capital Inc.

The project is part of a larger, system-wide plan to improve overall GO Transit service, including the delivery of GO Regional Express Rail (RER). This will provide faster and more frequent service across the GO rail network, with electrified service on core segments. It is scheduled to be fully implemented by 2024-25 and is expected to increase weekly trips across the entire GO rail network from about 1,500 to nearly 6,000 by 2024-25.

The plan has an estimated total investment of CAD21.3 billion (US$16.6 billion), making it one of the largest transit infrastructure investments in North America.