Moose has been at this since at least 2011.
http://www.cbc.ca/news/canada/ottawa/ottawa-area-commuter-rail-gathers-steam-1.1003316
And estimates, plans, design, etc are still at a conceptual stage.
I understood that some of the elements of refining a plan require expensive engineering and the like, but it doesn't seem like even back of the envelope type work has been undertaken.