I have laid the track down for the short variant but I haven't yet made the UI files for it and no AI for it exists at the moment. It will eventually. I don't usually let these out into the wild before they are done, but I made an exception this time I was looking for feedback. I'm also adding 2 kart tracks that are also at the facility, and a historic surroundings version of the donnybrooke layout.
Here's a smoothed out one. I left some bumps in because this place isn't smooth in real life, but the bumps that can launch cars into orbit should be taken care of. This also includes the AI (i didn't include the hints since after some testing it looks like getting rid of that bump fixed it) and cams provided by
@mrtomcat66 and
@DaBaeda. Thanks again!
https://sharemods.com/z90fq67xwy2h/gb_brainerd.7z.html
Unless anyone has any serious feedback on the road, the driving experience won't change much from here on out aside from the curbs not existing yet. The surroundings will definitely change a ton.