Ignore the chaining. Look at these examples:
These are surface=conrete:plates. You can clearly see the plates and the regular gaps in between:
https://commons.wikimedia.org/wiki/File:Concrete_road,_Dunamenti_Power_Plant,_2020_Sz%C3%A1zhalombatta.jpg
![][1]
https://commons.wikimedia.org/wiki/File:Concrete_service_road_on_Hardwick_airfield_-_geograph.org.uk_-_2154630.jpg
![][2]
https://commons.wikimedia.org/wiki/File:R750_Brittas_Bay.jpg
![][3]
These are surface=conrete. You don't see any regular gaps:
![][4]
![][5]
![][6]
[1]: https://commons.wikimedia.org/wiki/File:Concrete_road,_Dunamenti_Power_Plant,_2020_Sz%C3%A1zhalombatta.jpg
[2]: https://commons.wikimedia.org/wiki/File:Concrete_service_road_on_Hardwick_airfield_-_geograph.org.uk_-_2154630.jpg
[3]: https://commons.wikimedia.org/wiki/File:R750_Brittas_Bay.jpg
[4]: https://commons.wikimedia.org/wiki/File:Concrete_road_from_the_A24_to_Muntham_Farm_and_Cobden_Farm_-_geograph.org.uk_-_2205067.jpg
[5]: https://commons.wikimedia.org/wiki/File:Concrete_road_at_Lisgorgan_-_geograph.org.uk_-_582317.jpg
[6]: https://commons.wikimedia.org/wiki/File:Concrete_road_on_the_Broadlands_Estate_-_geograph.org.uk_-_591800.jpg
