1st of all, thanks 4 da awesome mod, looks great n feels great when u on high speed, but...when i pass through da green speed it actually slow me down to almost stop, but da worst is when i go through the turn blade, i fell through the bottom n land on the road somewhere instead....i don't know, maybe it's on my end, just 2 let u know, again, thanks :)

@Snk20183 thank you for your feedback and stars support~:D
Yes, your question is also mine~
Those green speedup sections are from game, stunt dlc, they should increase vehicle's speed. But somehow, when you drive over 200 km/h, it makes my car slow down.
I was hope those speedup sections can increase my car into a crazy speed~But failed.
And there's no option can change the setting of these section in menyoo.
About your 2nd question, well, I got you~~ :P
I designed it in purpose. I used a tube which is not a full cylinder. if you don't drive carefully, you will fall.

Update:
v1.1 update
1. fixed some missing track
2. add a few more details

Let me have a taste of it

好像好好玩的样子