Apparently using a saw blade, a narrow trench is being cut along the curb that separates the lane from other traffic:
The work is being done at night, so trench itself constitutes the evidence. Every so often, there is another cut at right angles, going towards an adjacent building. To keep debris out of the trench until the cables can be installed, a plastic cap is put on:
The fibre optics cable that is being installed by Globility (Primus) and they have pretty much finished their work on Laurier Ave. The project includes Laurier as well as Albert, Slater, Kent, Bank, O’Connor and Metcalfe. The entire project should be completed by mid September.