Adelaide Street North – CP Grade Separation ("Adelaide Underpass")
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About the Adelaide Underpass
Londoners have been making use of the underpass since it opened to general traffic in spring of 2024. Work is also now complete in the adjacent McMahen Park, including new gateway features and landscaping. With these finishing touches now complete, the community celebration marks the successful delivery of one of London’s most significant infrastructure projects, replacing a long-problematic at-grade rail crossing on Adelaide Street North impacted by delays, congestion, and safety concerns for Londoners walking, cycling, riding transit and driving, as well as emergency responders.
On Saturday, August 9, 2025, the City of London celebrated the completion of the Adelaide Underpass at McMahen Park. The community came together to enjoy local food, live entertainment, family-friendly games, face-painting, historical displays, and the open wading pool.
Above: A ribbon is cut in McMahen Park together by Adrian Hey, granddaughter of Thornton Archibald McMahen; Councillor Susan Stevenson, Ward 4; Mayor Josh Morgan; Arielle Kayabaga, Deputy House Leader of the Government and MP for London West; Peter Fragiskatos, Parliamentary Secretary to the Minister of Immigration, Refugees and Citizenship and MP for London Centre; and Joel Kennedy, Executive Director of N’Amerind.
Above: Government representatives, special guests, and City staff gather in front of the Adelaide Underpass.
About the project
The City of London is reconstructing Adelaide Street North from Elias Street to 80m north of McMahen Street, as well as Central Avenue from William Street to Elizabeth Street. The project will add an underpass beneath the CP Rail tracks, as well as nearby intersection improvements and active transportation connections, with wide multi-use paths on both sides of the roadway on Adelaide Street North.
Improvements to this civic boulevard rail crossing will provide improved pedestrian, cyclist, and transit user amenities consistent with Complete Streets principles.
This project will directly improve safety and reliability by eliminating the at-grade crossing, reduce cut-through traffic in nearby neighborhoods and improve active transportation and quality of life. There are also benefits associated with improving emergency service and transit reliability associated with the current at-grade crossing.
We acknowledge with gratitude the financial support provided by the Government of Canada and the Province of Ontario for the Adelaide Underpass project through the Investing in Canada Infrastructure Program (ICIP): Public Transit Stream.
Above: Conceptual cross-section view looking north along Adelaide, showing the underpass, walls and sidewalks.
Project Status
Work will continue on the Adelaide Underpass project in May 2025 and is estimated to be completed by the end of the summer.
Completing active transportation components
Restoration of park amenities
Public Update Meeting
The City of London hosted a virtual public meeting to share an update on planned construction of the Adelaide Street North Underpass project.
Stay connected
If you wish to receive email updates from the City of London regarding this project, you can click here to sign-up.
About the Adelaide Underpass
Londoners have been making use of the underpass since it opened to general traffic in spring of 2024. Work is also now complete in the adjacent McMahen Park, including new gateway features and landscaping. With these finishing touches now complete, the community celebration marks the successful delivery of one of London’s most significant infrastructure projects, replacing a long-problematic at-grade rail crossing on Adelaide Street North impacted by delays, congestion, and safety concerns for Londoners walking, cycling, riding transit and driving, as well as emergency responders.
On Saturday, August 9, 2025, the City of London celebrated the completion of the Adelaide Underpass at McMahen Park. The community came together to enjoy local food, live entertainment, family-friendly games, face-painting, historical displays, and the open wading pool.
Above: A ribbon is cut in McMahen Park together by Adrian Hey, granddaughter of Thornton Archibald McMahen; Councillor Susan Stevenson, Ward 4; Mayor Josh Morgan; Arielle Kayabaga, Deputy House Leader of the Government and MP for London West; Peter Fragiskatos, Parliamentary Secretary to the Minister of Immigration, Refugees and Citizenship and MP for London Centre; and Joel Kennedy, Executive Director of N’Amerind.
Above: Government representatives, special guests, and City staff gather in front of the Adelaide Underpass.
About the project
The City of London is reconstructing Adelaide Street North from Elias Street to 80m north of McMahen Street, as well as Central Avenue from William Street to Elizabeth Street. The project will add an underpass beneath the CP Rail tracks, as well as nearby intersection improvements and active transportation connections, with wide multi-use paths on both sides of the roadway on Adelaide Street North.
Improvements to this civic boulevard rail crossing will provide improved pedestrian, cyclist, and transit user amenities consistent with Complete Streets principles.
This project will directly improve safety and reliability by eliminating the at-grade crossing, reduce cut-through traffic in nearby neighborhoods and improve active transportation and quality of life. There are also benefits associated with improving emergency service and transit reliability associated with the current at-grade crossing.
We acknowledge with gratitude the financial support provided by the Government of Canada and the Province of Ontario for the Adelaide Underpass project through the Investing in Canada Infrastructure Program (ICIP): Public Transit Stream.
Above: Conceptual cross-section view looking north along Adelaide, showing the underpass, walls and sidewalks.
Project Status
Work will continue on the Adelaide Underpass project in May 2025 and is estimated to be completed by the end of the summer.
Completing active transportation components
Restoration of park amenities
Public Update Meeting
The City of London hosted a virtual public meeting to share an update on planned construction of the Adelaide Street North Underpass project.
Stay connected
If you wish to receive email updates from the City of London regarding this project, you can click here to sign-up.
The personal information submitted on this page is collected under the authority of the Municipal Act, 2001, S.O. 2001, c. 25 and will be used to provide details regarding future Adelaide Underpass supported communications, events, or activities.
Questions about this collection should be addressed to Max Kireev, Construction Project Manager, at 300 Dufferin Ave., London, ON N6A 4L9, or by telephone at 519-661-2489 ext. 5560, or email to mkireev@london.ca
Above: Conceptual cross-section view looking north along Adelaide, showing the underpass, walls and sidewalks.
