https://www.reminetwork.com/articles/early-work-expedites-surrey-skytrain-project
Montreal & Toronto were able to build 500ft or 152.5m long stations right from the start. The SkyTrain could have been constructed in a way where there was a future provision to have 152.5m stations instead of 80m & 50m truncated stops.
https://www.reminetwork.com/tags/surrey-langley-skytrain
https://the-intersection-point.blogspot.com/search?q=SkyTrain