Flipping thru one of the various magazines I get at work and came across this. I'm guessing this would have been a decent option for the Plessis Road underpass and might have reduced the timeframe for the project. Unfortunately the bass ackwards thinking of roadway/rail projects in Manitoba would not allow something innovative like this to happen.
From Rock to Road magazine (July/August 2013):
http://www.rocktoroad.com/content/view/2510/