This is absolutely incredible. As someone who often goes there for cycling holidays, and coming from a family of avid cyclist I couldn't be happier to see this. It is really well built and it definitely makes me feels as if I was there. Looking forward to the full route if you ever ddecide to make it.
Surely it depends on the PC and the settings chosen. A solution: in the models.ini files, delete the spectators: Objects2 and trimble. this should improve things. Personally I can run 50 AI at the same time in weekend/qualifying mode without any problem....