A no three wide rule?
http://slingersuperspeedway.com/pdfs.../threeWide.pdf
At Slinger (Wisconsin) Speedway, a very fast 1/4 mile asphalt track, they apparently don't allow three wide racing. I haven't been there since I was a kid in the late 70's, so I can't exactly picture the place, but the thought of restricting drivers and what line they run just seems absurd. That'd be like saying you can't run the cushion on a dirt track!