but… saw this today on Angers under the Cote Saint Paul leg of the Turcot rebuild. It does have a driver who is probably very highly paid and I wonder what exactly this thing does?
PostArctica
Not going gently into that good night at the blog formerly known as Walking Turcot Yards
PostArctica 
It’s a pavement machine made by Wirtgen of Denmark. As it’s website says: “Unmatched range of applications in concrete paving”.