This is a scratch-built version of Laguna Seca, made using real elevation data as a reference, which hopefully means it's quite accurate for a mod.
This is still somewhat of a work in progress in terms of texturing and adding roadside objects, but the track itself should be in good shape, and the surroundings are no longer really in an early alpha stage either. I had to upload it here on rather short notice since the AC forums are shutting down.
The track model is released under a Creative Commons license.
The Blender model is also available under this license, intended to be instructive to prospective track makers (although, this being my second Blender model, the track was created with willpower more so than technique), or even to provide a source of objects. This is from just before v0.6 (the released version has some bugs fixed) right now: https://drive.google.com/file/d/0B4k7b-9y_LM5eGJBdURYemU3a1U/view?usp=sharing
This track used to be hosted on the AC forums and has received some contributions from members there. Cameras, sections and track map were kindly provided by NightEye; the AI line was made by heavyweight1413. Thanks to both of you.
Here's a video of a lap around the current version: