Reddit user ducain23 posted a track in Halo 5 Forge which reminds me an awful lot of TrackMania. The dumb reddit video system doesn’t let me embed videos on other places sadly, so you’ll have to go to reddit itself to view the clip, needless to say, it’s pretty cool. I like the way he’s used the geometry to counteract gravity and keep things from falling apart. I’m not so sure I would be able to drive on this course without falling off. I’m totally more of a gunner, and my game stats will back that up (though they haven’t been refreshed in years sadly).
I can envision a really interesting game mode here with drivers, gunners, and passengers. The passengers are holding a bomb and you gotta drive through moving checkpoints to drop it off. It might work similar to stockpile from Halo Reach. It’s a work in progress but I think it could be tons of fun.