Meh. There are places like Indy that are just tragedies waiting to happen with their racing line being so far from the wall and the speeds so high, but I find it hard to believe that even a well sorted modern F1 track is "safer" than a place like Bristol with modern barriers. Keep in mind that oval racing in the US is conducted in vehicles that are less safe for the driver to begin with.
Bristol != KY Oval. There are lots of open wheel cars with wings that have operated at short tracks in "dirty air" without killing anyone. There are hundreds of tracks in the US that specialize in such racing.
Ooooook Bristol DOES NOT = KY Oval. Bristol is only .533 miles with two turns while Kyoto is 1.9 miles with 3 turns (not including that little bend).
I seriously doubt Bristol is ment to handle open wheel racing considered it's so small. F1 drivers would have their hands full braking. In fact, Nascar drivers are already having a hard time maintaining their line with the heavy duty breaking. I've also raced there in Nascar 2003 and rFactor, and if you have a fast car you cannot go full throttle anywhere on the track.
You fail to realise how much dirty air comes from F1 cars, these are not normal open wheelers these are the most sophisticated peices of machinery in the world of motor sport. Dirty air comes into effect on tight corners on a race curcuit so imagen the effects on an oval track.
I garrantee this is probably the number 1 reason you will never see them on a Oval track..
It likely is. I mean the Formula 1 cars are so advance and fragile. You have to realize that Formula 1 cars ARE NOT the same as INDY cars. In fact they couldn't be more different