Some oval tracks used in Indy, Cart and Nascar along past years.
1.5 mile: Chicagoland, Kansas and Kentucky.
1.3 Mile: Nashville (not used anymore).
1 Mile: Phoenix and New Hampshire
0.8 Mile: Iowa.
All of them were converted from Antonio Pessoa's et al GP2 tracks (thanks to them).
All of them are incomplete (scenery and pits problems).
Contributions are welcome.