I believe the original blog post from 2021 is still online with a different URL https://www.metrolinx.com/en/discover/lakeshore-east-express-trains-paused-for-construction-work
I've skimmed through the prior ~50 pages of this thread to educate myself on the progress of the Stouffville line.
Is the West Highland Creek bridge the final "major construction" project to twinning track from Union station to Unionville station?
