>>337151675
https://docs.unity3d.com/Manual/ImportingTextures.html#AnisotropicFiltering
It improves textures that you'll mostly be looking at obliquely (like the track). It's not that expensive on modern gpus, so for select textures you can crank it up in the import settings.

Trilinear filtering blends between mip levels, which you can see pretty obviously in your screenshot. Also more expensive in texture reads than bilinear, but fine for applying selectively.