Quote:
Originally Posted by hammersklavier
Given that Deux-Montagnes already has decently-performing EMUs, I think the network would optimally just use designs derived from them; is tunnel capacity really such an issue you'd rather kick Mascouche trains out?
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Automated trains and conventional trains don't gel, and the automation is essential to keep operating costs low and frequency high. I think at the frequencies proposed for REM, it will indeed max out the capacity of a two-track tunnel (well, the RER-A has 90-second headways but that's kind of an outlier)
RER is a useful planning concept, but automation is a different and equally useful paradigm.
This is basically automated SkyTrain minus the linear induction traction. The power system may very well be compatible with other electrified lines, but the signaling will be totally incompatible with the conventional trains used on Mascouche trains.