Construction underway - oh - is that why terminal operations at Cote-Vertu are so bizarre? When I was there a couple of months ago, the trains were all changing tracks, south of the station, which seemed a potential bottleneck to me (the in-service train arrived from the south on the northbound tracks, but then departed empty heading southbound, changed tracks, and then went northbound again (still out of service) to arrive on the southbound platform!)
I just assumed they'd been doing that since the 1980s - but perhaps not?