ant6n wrote:Maybe its cuz the only thing that's been running on those tracks in twenty years is the mr-90, which is much lighter. And those tracks just can't take the weight.
What I don't get is why they don't just buy/lease three or four surplus/used electric only engines that were used in the NEC, which should be lighter and ready to go, at least in terms of track and weight concerns (plus, much cheaper).
I doubt it is the reason.
The Central Station train tracks are class 1 track (speed is up to 15 mph) while the tracks on the Deux-Montagnes subdivision are class 4 or 5 track since the trains can run up to 65 mph. Class 4 or 5 tracks require more maintenance and are in a much better shape than class 1 train tracks, so the ALP-45DP can run on the Deux-Montagnes subdivsion without any problems. The only modification that they have mad on the locomotives is the wheel profile in order to reduce the lateral forces exerted on the rail.
I think that the main reason for not deploying immediately the ALP-45DP's on the Deux-Montagnes subdivision is because there's still a series of testing that has to be done in electric mode and in the Mount-Royal tunnel since those engines have only been used in diesel mode until now.