Since 2024, VMT has been supporting the excavation works on the Ontario Line South, a major section of Toronto’s new rapid transit network. With four TUnIS Navigation Roadheader systems in operation, VMT provides real-time guidance and data support for the excavation of tunnels and stations under Toronto. A project that combines precision engineering, digital expertise and teamwork.
The Ontario Line South stretches from Exhibition Place to the Don Yard portal, covering approximately six kilometres of twin tunnels and seven new or expanded subway stations – including underground interchanges with existing TTC lines – right through the heart of Toronto. Once completed, the new rapid transit line will significantly shorten travel times and improve mobility for more than 220,000 residents along its route. The excavation and station works are being delivered by Ontario Transit Group (OTG), a joint venture between Ferrovial and Vinci (JANIN ATLAS).
Smart navigation for complex excavation works
VMT’s TUnIS Navigation Roadheader systems enable operators to maintain millimetre accuracy even in difficult ground conditions or limited visibility. A total of four systems are deployed on site, three of which are currently in active use, supporting both the tunnel drives and underground station caverns.
Through real-time navigation, positioning, and continuous monitoring, VMT’s technology provides reliable guidance for every excavation step. In addition, VMT’s on-site and remote service teams ensure continuous system performance and quick troubleshooting, keeping progress on schedule and aligned with design parameters.
Increasing safety and efficiency in conventional tunnelling
By combining precise measurement technology with practical, jobsite-proven expertise, VMT is proud to play a role in shaping one of Canada’s most transformative infrastructure projects. The Ontario Line South demonstrates how innovative systems are redefining conventional tunnelling, improving accuracy, safety and efficiency at every stage.
A big thank-you to OTG for their trust in VMT and our systems.