The model's madeup of 32 x 24 = 648 tiles. The model has real world scale. It's eight meters lenght and width.
There's an overall UVmap, and individual tile UVmap, and a medium UVmap. This lets you introduce elements and details to each individual tile, to the whole square, and also to the segment of 8x8 tiles. Its very convinient when you have the option to either assign an overall pattern to the pavement (including puddles, markup, wordings) and to each chip.
I proudly present this UVsets in Maya MB and .fbx
It proved to be viable know how...
YOU REALLY DON'T NEED TO HAVE TEXTURES LARGER THAN 3K!
Mind that tiny elements, like random bumps, or scratches will never ripple or ruffle. There's one additional UV-channel, named 'SingleChaotic', designed specially for this purpuse. It is ideal for procedural texturing.
A quick guide for UV-linking
UVSingle normal maps
UVEighht priodic patterns
UVSinglChao procedural textures
UVPlural macro patterns