A simple way to check older projects like this Is to view the authors profile and see when they where online last. Its been 2 months since that author has been online, so I'd say its safe to assume that they aren't currently working on this project.
this one I believe was going to be released when meshes could have properties other than concrete or the race update, I'm not sure.
I want this and all of your work to come out, it all looks so amazing. Everything's exactly what I've been wanting in BeamNG, some hard core rally stages and a proper rally-cross. But I have to ask, why are you waiting for the Race Update to release your work? It's been like what, a year since you started your first project and still you wait for it? ;~;
If you are really desperate to play on some of these maps then some of them are released and playable in Assetto Corsa. But only the ones that make sense to put in Assetto Corsa.
I play BeamNG Drive, not Assetto Corsa. They are two very different games, and a lot of his work that he's teased here in the forums seem to be better for BeamNG, not Corsa. But I understand your point.
The last he was seen here was in March. I don't think we'll be getting the maps he made, haha. I think he wants to wait until multiplayer is here... But you're right, the race update is pretty much here with Scenarios as they added timers. Such a shame.