love these AI traffic setups you've done, thanks very much! This worked fine for me in the vanilla launcher, although it took a bit of time to load.
In the discussion posts I've also attached an update/variant for the ai_hints.ini file which slows the traffic and keeps them to more realistic behavior as detailed in my post.
I generally stack the grid with slow boring cars and lots of ford transit vans for mobile chicanes and a couple interesting cars for eye candy while I'm driving :D
Anyway thanks for your hard work on these traffic files, they're great.