Thinking about Blackwood Highway Layout

[Mbt]

So, I tried to made a highway road with objects, slabs,ramps and barriers.

Here's the short video about highway;
https://photos.app.goo.gl/ccP4GVv5vmn9pjLj6

This highway seems enjoyable cuz BL not have any high speed drivable zone.

But i can't do anything more because of object limits, new BL layout does not have objects in race track, maybe it can be possible but I'm too lazy to done this. Also I don't know how can i connect that flying highway to drivable, need your thinks about what can be done on this.





I think should have 2 enterence from pitlane and stunt zone, and top of the highway will U-Turn zone.




What's missing;

-Connecting roads,
-Barriers that will save you from go oob
-Some road slabs not in correct position(over road)

I'm not a layout maker, can someone continue this if it sounds good for everyone?

Here's the download link for layout