I didn't realize how much "studying" had been done going back 40 years..........
These were 100+ page documents written for the government, the verdict of every feasibility study: HSR is feasible. Would be operationally profitable.
February 2011, Feasibility Study of a High Speed Rail Service in the Québec City – Windsor Corridor:
244 pages
tc.canada.ca
August 1995: Quebec-Ontario High Speed Rail Project - Final Report, for the Government of Canada, Ontario and Quebec
121 pages
drive.google.com
March 1995: Quebec Ontario High Speed Rail Project - Preliminary Routing Assessment and Costing Study
108 pages
drive.google.com
February 1995: Quebec- Ontario High Speed Rail Project- Industrial Strategy Study - Simpson Guerin Consortium
130 pages
drive.google.com
May 1991: Ontario/Québec Rapid Train Task Force Final Report
237 or 490 pages
drive.google.com
April 1990: High Speed Rail in the Quebec / Ontario Corridor - A Review of Previous Studies, Final Report
186 pages
drive.google.com
^That was a review of 6 of 8 previous studies on the Corridor from BEFORE APRIL 1990.
@Mrgeosim Alto has moved beyond preliminary feasibility studies. HSR on the Corridor has been deemed feasible. They've moved on to the co-development stage. AFAIK this means detailed project design, EA/impact assessment, and final business case. If you want to read Alto's 100+ page documents, you'll have to wait a bit longer.