https://en.wikipedia.org/wiki/New_South_Wales_H_set
| Train length | 81.55 m (267 ft 65⁄8 in) |
|---|---|
| Car length |
|
https://en.wikipedia.org/wiki/New_South_Wales_H_set#Design
https://en.wikipedia.org/wiki/South_Coast_Line
https://en.wikipedia.org/wiki/Sydney_Trains
Example of selective door operation. The doors in the first 2 carriages are not opened, because the platform is too short for an 8-carriage OSCAR train. https://en.wikipedia.org/wiki/Selective_door_operation (SDO)
This platform can accommodate 6 out of an 8 car heavy-rail train.
This means that an extra car or 2 can be added to a shorter train, even if the station isn't long enough.
Thus, before lengthening the stations on the first 2 Skytrain lines, a 5 car train could become a 7 car train. Perhaps even a 9 car train, like with the Montreal Metro trains. Eventually, the stations on the first 2 Skytrain lines could be lengthened for 7 car trains and whenever possible, 9 car trains.
Unfortunately, the 50 m level station clearance for the YVR-Canada Line trains wasn't designed for 5 car, 100 m trains, just a 2.5 car joke of a train. However, with some platform modifications and some very slight station lengthening, three 20 m cars might be possible, instead of a 2.5 car joke of a train.
Then, once a 3 car, 60 m train is adapted to a 50-55 m platform, SDO can enable an extra car at each end to become a 5 car train. Perhaps ultimately, there could even be an extra 2 cars at each end of the middle 3 car train, to become a 7 car train.
