This article is from the Motorsport FAQ, by A H Henry bspahh@midge.bath.ac.uk with numerous contributions by others.
The Indianapolis Motor Speedway is a 2.5 mile square oval. The
straights are 50 feet wide. Two of the straights are 3,300 ft long,
the other two are 660 ft long. There are four turns, each of which is
1,320 feet long 60 feet wide tarmac. The 2.5 mile circuit is measured
3 feet from the inside white line. The turns are banked at 9 degrees
and 12 minutes. Eleven three car rows start the Indy 500.
 
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