https://dailyhive.com/vancouver/skytrain-yaletown-roundhouse-station-additional-fare-gates-completed
The Canada line is such a watered down version of what should have been a proper big city airport and ferry rapid transit link. Just because this infrastructure project had to be scaled down during its first phase, the stations still could have been designed to eventually accommodate 5-6 car trains. Unfortunately, the stations were only designed to accommodate a 2.5 car train. While this perfectly fits in with the inept urban transportation mentality and especially fits in with the BC congestive transportation agenda, this is another sad result.
https://dailyhive.com/vancouver/skytrain-yaletown-roundhouse-station-fare-gate-expansion
Despite being downtown with several condominiums around, the Yaletown-Roundhouse_station is too small for an inner-city station.
https://en.wikipedia.org/wiki/Yaletown-Roundhouse_station#Station_information
There is barely enough level clarence beyond the short platform for another car. To remedy this inadequate situation, this line needs to have three full-size cars, not just some eventual 2.5 car joke of a train.
https://www.eke-electronics.com/automatic-selective-door-operation-asdo
Then eventually, once people got used to a 3 car train, an extra car could be added at each end, resulting in a 5 car train. Its a workaround that can eventually enable the 3rd line or the C Line to run 3-5 cars trains to meet demand.
Then the Exp. Line and Mil. Line, or what could become A & B lines with standard 5 car trains. However, during the busy times, a 7 car train could be possible with selective-door-operation technology.
It would have been better to have just built all of the Skytrain stations long enough for 5 car trains in the first place, with enough level track clearance for 10 car trains eventually.