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"  The Indy 500 has a unique qualifying format that allows for multiple attempts over two days: Pole Day and Bump Day. All completed attempts entail four timed laps around the 2.5-mile track.   Pole Day   From 11 a.m. until 4 p.m., the top 24 positions will be available with each car allowed three attempts. The fastest nine cars advance to a shootout for the pole from 4:30 p.m. to 6 p.m. They are required to make at least one attempt and additional attempts are allowed as time permits. The pole and next eight positions are determined by the fastest four-lap averages.   Bump Day   The final nine positions of the field will be filled by the next nine completed attempts.   After the 33-car Indy 500 field is full, a faster attempt bumps out the slowest car with the exception of the top nine spots, which are considered guaranteed starting positions. "^^<http://www.w3.org/2001/XMLSchema#string>
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