I spoken with the contractors. They claim, correctly, that the cycletrack is *not actually open* for normal use, and their parking is intentional to keep motorists from driving in the unmarked cycletrack. I have also noticed that when they are not parked in the future cycleway, they place safety cones at the junctions to deter motoring. Once the full signage, striping, and bollards are in place, the cycleway will open for normal use.
I also hope that their habit of blocking it actually ceases once it is open, especially near that big development.

The bikeway appears to be complete from a structural standpoint, so the city should open it. Leaving it officially closed invites contractors to continue to misuse it for parking.

Thanks for opening the bikeway. It looks like contractors are staying off of it now. Please remove this sign (see photo).