I respectfully disagree. People that cannot bring up the discipline to drive sober and keep their attention on the road, even if their jobs would depend on it, shouldn’t have the privilege of being allowed to operate a machine that can easily kill when making a mistake or misjudgment.
These projects are awesome! IIRC they swiveled an entire building whilst still in use somewhere in America (Maybe NYC?). Without interrupting plumbing and electricity.
Edit: Found it, it was in Indiana: Indiana Bell building