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METRO ONTARIO LINE - TORONTO

The Ontario Line is a new, fully automated metro line currently under construction, destined to significantly transform mobility within the city of Toronto. The alignment will traverse the heart of the urban area, creating a fast, efficient, and modern link between the Ontario Science Centre, Exhibition Place, and the future Science Centre station at Don Mills Road, interfacing with the Eglinton Crosstown Light Rail Transit (Line 5).

With a total length of approximately 16 kilometres and 15 stations, the Ontario Line represents one of the most ambitious and innovative infrastructure schemes not only for the city but for the whole of Canada. Along its route, the line will ensure high intermodality by connecting to Subway Lines 1 and 2, three GO Transit regional rail lines, and the new Eglinton Crosstown LRT, contributing decisively to reducing journey times and improving the efficiency of the regional transport framework.

Over half of the alignment will be built in tunnels, featuring eight underground stations, while the remainder will run at grade or on elevated structures. Six of these will serve as major interchange hubs, integrating bus routes, streetcars, the regional rail network, and the subway to guarantee comprehensive, capillary integration across the entire Greater Toronto Area mobility system.

The delivery of the Ontario Line is managed and coordinated by Infrastructure Ontario and Metrolinx, who are responsible for overseeing the entire programme from design through to construction as the project sponsors.

Within this vast and complex programme, FS Engineering is actively involved across multiple specialist domains, contributing its engineering expertise to deliver a strategic, innovative rail infrastructure scheme destined to profoundly reshape the future of mobility in Toronto.

RSSOM Project

Since 2023, FS Engineering has been engaged on the RSSOM (Rolling Stock, Systems, Operations and Maintenance) package for the new automated Ontario Line metro. Responsible for the track alignment design and the track form systems across the entire 15.6 km line and depot, the company has undertaken the complex, strategic role of managing technical interfaces with all five civil contractors involved in the project.

Acting as a sub-consultant to the lead designer Arcadis and the project contractor Connect 6ix—a consortium comprising Webuild, Hitachi Rail, and Transdev, among others—the company is developing and modelling the ballastless track system in a BIM environment, along with all trackside assets including turnouts, switch heaters, buffer stops, and rail lubricators.

Between 2023 and the present, the FS Engineering team has successfully delivered the track alignment design through numerous iterations and finalised the track form design for the North, South, and depot sections. This work was delivered through continuous coordination across multiple stakeholders, supported by a co-located project team on-site in Toronto alongside specialist engineering support from Italy.

The construction drawings are scheduled for completion by the end of 2026, coinciding with the start of track laying works within the maintenance depot. Negotiations are also being finalised for the construction supervision contract, which will see FS Engineering remain on the project until its scheduled completion in 2030.

Furthermore, since February 2024, FS Engineering has been supporting the Connect 6ix consortium—utilising both its on-site representatives and technical specialists in Italy—by delivering RAMS (Reliability, Availability, Maintainability, and Safety) engineering for the civil works, MEP systems, and permanent way.

These activities are critical to analysing, verifying, and validating the entire infrastructure network in terms of reliability, availability, maintainability, and safety. This approach treats the infrastructure as a complex, integrated system throughout its entire asset lifecycle, spanning design, construction, commissioning, operations, and future maintenance.

PTUS Project

Since January 2024, the FS Engineering team has been engaged in the design of the TBM-bored tunnel and its fire protection systems, working alongside lead designers AECOM and Arcadis within the PNC Consortium (comprising Webuild and FCC).

The project is delivered under an innovative Progressive Design and Build public-private partnership model, which fosters the gradual evolution of the design alongside continuous technical and economic optimization.

During 2024, using the reference feasibility design from the tender stage as a baseline, FS Engineering performed technical validation and comprehensive value engineering to enhance design solutions before developing the 30% preliminary design package.

In 2025, the team delivered the 60% detailed design and subsequent 90% final design packages, enabling the contractor to establish the final construction budget. The 100% issued-for-construction design was completed in June 2026, while tunnel excavation is scheduled to begin in 2027, during which FS Engineering will continue to support the consortium through the construction phase.

All design stages have been developed utilizing BIM methodologies and information management tools, adopting an integrated approach to ensure structured, traceable data management throughout the design lifecycle. The information modelling encompassed both the tunnel's structural components, including the precast concrete segments, and the MEP infrastructure, such as the fire main network, ensuring the delivery of fully coordinated, interoperable models.

The application of these BIM processes and tools also supported design quality assurance and control activities. This approach streamlined clash detection, simplified technical interface management, and facilitated the progressive validation of design solutions within a complex, multi-stakeholder and multidisciplinary project environment.