It would be cool to have such pieces, might be similar to those changing from normal flat street to the tilted / ones.
My thought would be you drive towards a looplike first part which makes you drive towards the sky, followed by a piece allowing a 90° turn around your axis ending in the top part of the loop again (pretty much like those vertical turns in island, just as they are horizontal

)
Although they might not be necessary at all, it could be kinda cool to leave the canyon by this way (besides, is there just that huge loop, or small ones as well?)