vancouver skytrain-mark-i-cars-ttc-scarborough-rt-line-3

 https://dailyhive.com/vancouver/skytrain-mark-i-cars-ttc-scarborough-rt-line-3

https://blog.metrolinx.com/2021/02/16/keeping-the-scarborough-subway-extension-moving-forward/

https://blog.metrolinx.com/category/scarborough-subway-extension/