Siemens Mobility to provide Signaling and Train Control Systems for Ottawa’s Trillium Line South Extension 

Oakville, December 10, 2020

  • Automatic Train Protection system to be installed 
  • Intelligent infrastructure will enhance operations

Siemens Mobility has been selected by TransitNEXT, a wholly owned subsidiary of SNC Lavalin, to provide the Signaling and Train Control (S&TC) Systems for Ottawa’s Trillium Line South Extension project.  This includes updating the signaling system and installing new Automated Train Protection (ATP) technology that will ensure safe train movements and optimize rail operations. This will be increasingly important given the higher ridership levels expected with the Trillium Line’s new south extension and the connection to Ottawa’s Macdonald-Cartier International Airport.  The project is expected to be completed in 2022.


“Having prime responsibility to ensure that this project is completed successfully and on-time, we needed to have the right partners,” said Robert Alger, President, Infrastructure Projects at SNC-Lavalin. “Siemens Mobility is not only proven as an innovative technology provider, they are a company who has solid track record in completing complex projects regardless of challenges and climates.”   


“The Trillium extension will provide greater access to Ottawa South and to Ottawa’s travelers, including the more than five million passengers that utilize the airport per year,” said Yves Desjardins-Siciliano, CEO of Siemens Mobility in Canada. “Our technology will help optimize the operations on this new line and provide an enhanced passenger experience that will feature greater reliability and availability given the new airport service.”   


Siemens Mobility will provide the engineering, design, integration support, testing and commissioning of Siemens Automated Train Protection (ATP) system – a state-of-the-art proven technology that will be installed on the existing trains, tracks and stations servicing the current Trillium Line, as well as the new trains, 16 km of new track and eight stations to be built for the new extension.  Further supporting this newly installed train control system will be Siemens’ latest signaling systems, switch machines and signals.


The Trillium Line is one of two rail lines operated by the City of Ottawa servicing the greater Ottawa area.  TransiNEXT will construct a new four-kilometer rail link that provides rail access to the airport, providing an easier, more affordable transportation option for airport travelers. It is also expected to help reduce the heavy traffic along Ottawa’s Airport Parkway and its neighboring communities.


TransitNEXT is the prime contractor responsible for the design, build, finance, and maintenance of the Trillium Line South Extension project.  The operator of the line will be OC Transpo.


Siemens Mobility has been providing solutions to the Canadian transportation industry for more than 40 years, including light rail vehicles in Edmonton and Calgary, trainsets that will be delivered to Via Rail starting in 2021, and the rail electrification of the light rail systems in Kitchener-Waterloo and Ottawa’s Confederation Line. 

Contacts for journalists

Elizabeth Cho

Phone: +1 917-622-2413;



Follow us on Twitter at:


For further information about Siemens Mobility, please see:

Siemens Mobility is a separately managed company of Siemens AG. As a leader in transport solutions for more than 160 years, Siemens Mobility is constantly innovating its portfolio in its core areas of rolling stock, rail automation and electrification, turnkey systems, intelligent traffic systems as well as related services. With digitalization, Siemens Mobility is enabling mobility operators worldwide to make infrastructure intelligent, increase value sustainably over the entire lifecycle, enhance passenger experience and guarantee availability. In fiscal year 2018, which ended on September 30, 2018, the former Siemens Mobility Division posted revenue of €8.8 billion and had around 36,800 employees worldwide. Further information is available at: