Wow, what can I say that hasn't already been said? I'm blown away.
I'll admit that I'm one of those who tends to disregard fictional tracks, but I will always give them a shot if they look interesting. After chucking a Yellowbird around the full course for just over an hour I can say that this one is right up my alley and is absolutely staying in my library, what a fantastic layout.
The work you have put in to make this look and feel authentic is apparent, it's a beautiful looking track in it's own run down way and is incredibly rewarding to drive; Great undulations with some lovely multi-apex and cresting corners, the bumpiness is spot on for me, the flow is great and it will definitely bite you if you get off line. That is a good thing.
Even if some will try draw comparisons to other tracks, especially with the sort of corkscrew-esque corner, it is unquestionably unique enough that it stands up on it's own. Unique to the point that I feel bad for even bringing that up but I know that's what people will see and read in the reviews and I really hope that they won't be turned off.
I urge everyone to give this one a shot.