Via's plan falls short of full high-speed rail, but Mr. Desjardins-Siciliano insisted it's better and more affordable. Via Rail has agreed to delay a speed increase for an express route between Ottawa and Toronto by 60 days after city councillors agreed more consultation was needed.
On top of that, there may be other speed limits as well - for instance, VIA's F40's are limited to 90 or 95mph, regardless of the speed limits of the track they are running on. THEN, there are local speed limits for physical situations - Permanent Slow Orders.

High Frequency Rail is VIA Rail Canada’s proposal to transform passenger rail services in Canada.
If approved following further due diligence on the part of the Government of Canada, it would create new trains on dedicated tracks between major centres (Quebec City-Montreal-Ottawa-Toronto).