Passenger High Speed Canadian high-speed project could require lengthy tunnel to reach Montreal

Canadian high-speed project could require lengthy tunnel to reach Montreal

By Trains Staff | January 21, 2026

Tunnel could also be an option in Toronto

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Map of area between Toronto and Quebec City
The shaded area shows the corridor under consideration for the Toronto-Quebec City high-speed line. Alto

MONTREAL — Canada’s high-speed rail project could could involve the construction of lengthy tunnels in Montreal, the company responsible for the project says in a route description on its website — which could greatly increase the cost of the project. A tunnel could also be an option in Toronto.

Alto, the Crown corporation that will oversee construction and operation of the route between Toronto and Quebec City, says in its look at the corridor under study that to reach Montreal, “the current hypothesis” involves building a tunnel under the Rivière des Prairies and Mount Royal to access downtown directly, reducing integration challenges in a dense urban setting. The station, planned for the Ville-Marie borough, could be at surface level or underground; several options are under review in collaboration with municipal authorities.”

That tunnel would be more than 10 kilometers (6.2 miles) in length, and a professor at Montreal’s McGill University told the Canadian Press that construction of that tunnel would cost more than Ca$1 billion per kilometer, or $1.17 billion U.S. per mile. At that price, the news agency says, the tunnel would eat up up 12% to 18% of the project budget of Ca$60 billion to $90 billion.

Lack of a clear route into downtown Montreal is a significant issue for the high-speed line. The existing 3.3-mile (5.3 kilometer) Mount Royal tunnel, built by a Canadian National predecessor between 1912 and 1918, was used for commuter rail service until 2020, when it was turned over to the Réseau express métropolitain light rail project.

Similar downtown access challenges exist in Toronto; Alto’s route description says it is considering options to reach downtown from the north or the east, including use of existing corridors, tunnels, or elevated tracks.

Alto is currently involved in consultations to develop a final route for the 1,000-kilometer corridor; the study zone addresses an approximately 10-kilometer-wide band along the projected path.

— To report news or errors, contact trainsnewswire@firecrown.com.

3 thoughts on “Canadian high-speed project could require lengthy tunnel to reach Montreal

  1. As a survivor of the 1970’s, I’m trying to come up with a 1970’s psycho-babble explanation for Canada. Imagine a man whose marriage has crumbled to almost nothing. Rather than working on his actual marriage, he spends his life constructing a fantasy that he’s going to meet and marry the most beautiful, brilliant, wealthy and accomplished celebrity he reads about in People Magazine. What would be the psycho-babble term? Projection. Transference. Something like that.

    That’s Canada. Canada’s national passenger railroad’s only accomplishment is discontinuing and downgrading trains while raising fares. So rather than addressing that issue, Canada comes up with this Alto fantasy.

    Canada is actually far worse than California. While California has sidetracked itself with CalHSR and Brightline West, California can point to magnificent accomplishments, almost unbelievable success, with incremental Amtrak trains. Canada has no such accomplishment with VIA Rail; quite the opposite.

  2. They should consult with Gavin in California. He knows a thing or two about how to get the most out of taxpayers money and how to keep the project’s money flowing.

    1. Maybe Gavin could borrow some Canadian engineers. Gavin has no idea how to tunnel through the San Gabriel Mountains into Burbank, and from Burbank to Los Angeles.

      Substitute Los Angeles for Toronto, and San Jose for Montreal, I’m confident that with enough tens of billions of loonies and decades of time, Alto could look into opening from Peterborough to Perth.

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