Whoops, must correct an error - according to this post
those Agilis tags are the city's fibre and Bell's are the orange ones. Which makes sense, as I tried following the blue run to see where it went, and it disappeared at a larger pole on the corner of the taxation centre's lot. If the fibreOP lines are the ones wrapped with orange where they cross the poles, then they run around the corner and down Lasalle.
The truck was still in front of Pioneer Manor around 4 today, so whatever they're doing there must be a big job. Patience is thinning.