Ontario's Metrolinx is doing its homework before the "push box" operation which will see a hollow concrete box pushed underneath the Lakeshore West rail tracks at the Port Credit GO Station to create a tunnel under the rail tracks, allowing the future HuLRT line to move without disrupting rail service on the tracks above.

https://blog.metrolinx.com/2022/02/17/see-video-of-pre-push-work-on-hurontario-lrt/