Concrete roads were fashionable in the UK in the late 1990s, although most have since been tarmacked over (one notable remaining section is on the A35 in Puddletown Forest, built in 1999 and not since resurfaced).
This is what West Sussex County Council have been doing. It looks like job isn't finished and the former smooth surface is replaced with the chippings.
A few years ago the rage was the very smooth soft finish which caused a number of accidents but was a much better drive.