How a concrete road is built - GIF

How a concrete road is built.

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Previously:

Chip sealing a road - GIF
Cross section of a road in England - photo
Iron ore road train - GIF
Road painting arrow technique - GIF
Thermoplastic road marker - GIF

I wonder if tire manufacturers all collaborated on the design of that “grippy” machine

I note they don't seem to use crushed compacted stone as a load bearing base as they do for asphalt roads.
I assume not required as the reinforced concrete slab spreads the tyre load over a wide area.