[borne0]

That's true. Montreal just upgraded their rolling stock: (The MR-73 didn't owe them anything https://en.wikipedia.org/wiki/MR-73) but the new cars (https://en.wikipedia.org/wiki/MPM-10) have the doors in the same place as the MR-73 cars.

Admittedly I hadn't thought of that, but I don't think there's that much variety in rolling stock for a given location, and when speccing out replacements I don't think it's too much to ask that the doors are in the same place (cars are purchased in dozens...), maybe I'm wrong. Montreal is a much smaller network than New York.

[gruez]

>when speccing out replacements I don't think it's too much to ask that the doors are in the same place (cars are purchased in dozens...)

that pretty much only works if you have 1 generation of rolling stock currently in use, and you know (or forsee) that you want to install platform doors. considering that the new york subways were built before platform doors were a thing, I can totally see how door location wasn't even a concern when purchasing rolling stock.

[loufe]

Exactly. The generations don't HAVE to have different dimensions. There's no worldwide metro standard across all dimensions leading to "common" models, every subway system requires custom made. Of course they can work them in, like they do in Montreal (where I see them working harmoniously)