World Amazing Modern Road Construction Machine Working - Extreme Fastest Concrete Paving Easy.   Great machines. They look very expensive tho.  Is the spinning thing for a canal I don’t think it’s for a road because if it was to rain  all the water would go in the middle.  The Romans had one of those when they built their roads. That’s the reason they are still good in the U.K. 2000 years after.  Automation making things easy, faster, more precise, and help lot of advantages..
But it eats lots of jobs.. this disadvantage is over all those advantages