So, time for some feedback
@MLT 
. Please don't take anything harshly, it's honest feedback on what is done and what could be better.
I think the feel of the track is what it was supposed to be - somewhat desert atmosphere, with long roads to drive at high speeds in freedom.
On the technical side:
1/ first and most important issue: my car wobbles at the PIT location, and then throughout most of the track. This might be a physics limitation. How far from center is the PIT location ? AC Physics do not behave well with maps larger than 16 sq km.
As a side note (and probably for same reason), the far away mountain tips are flickering.
2/road texture "repeats too much, in the sense that tiling is too visible. Maybe redo UV mapping using strips of texture (like 4096x1024) ? That would break the tiling a bit. Also, don't put too much detail into the diffuse - keep that for the detail texture. Remember to use the correct shader and technique for road. What we all need to aim for is
THIS 
. (I include myself of course).
3/this applies also for side rails - use the shaders to have nice detail from up-close.
4/some of the vertical walls need proper UVmapping - it's a small effort but goes a long way
5/only a few signs seems too bright on my PC, so maybe just check the shader values.
6/don't forget to change the shading to smooth in the 3d program you are using - this will avoid having sharp edges on the scenery.
Personal opinion:
I think this was a great learning project, and if it is the first track it is a good effort. However (especially considering your other WIP projects) I would not invest much more time into this. Let's assume even that it will be perfect from a technical point of view, I do not think it will get enough use compared with the time put into it. Maybe in reality could be exciting to drive, but in a game (which AC is after all) people will look for "something" more. And because of the geography of that area, there isn't much more one could add.
Like I said, this is a very personal opinion and I might be wrong. But I should specify that I am more hyped for that Industrial Zone project or Fiorano

.