Ask and Ye shall receive!
Ok so I set it up with 32 cars (The max count), and I set variable weather. Don't mind the driving too much, I was looking at the frames while I was driving so I screw up a lot. I noticed a bit of a hit, but for the most part it stayed near 60 even with the weather effects.
Check it out:
https://youtu.be/Exz4TubkYCw