broadwaysubway.ca current construction work page lists most recent work as:
"September 18, 2020 – Trolley Wire Relocation Project
Weekend work will occur Sep 19-20 to remove overhead trolley wires at the intersection of Broadway/Oak"
They've done a bunch of these as well as advance utility relocation projects. Waiting for the first construction that isn't one of these two!
The main
broadwaysubway.ca page says "Construction will begin in fall 2020, with the line in service in 2025."
Fall 2020 began a few days ago and goes until Dec 21st so it could be almost three months and still technically start in fall 2020. Hopefully sooner!