Here's the breakdown of time trials May 19-20 for the 33-car Indianapolis 500:

Order – A blind draw is conducted prior to each qualification day.

Warm-up laps – Each car is permitted two warm-up laps prior to the timed qualification laps. IZOD IndyCar Series officials may permit three warm-up laps if they deem it necessary.

Green flag laps – A qualification attempt consists of four consecutive timed laps. The aggregate time is recorded as the official qualifying time for the car.

POLE DAY

Qualifying is broken down into two segments, progressively narrowing the field to determine the pole winner.

Segment One – Held from 11 a.m. to 4 p.m., to determine positions 1-24 in the field based on the fastest four-lap averages. Once all 24 positions have been filled, bumping will occur until 4 p.m. Each car has up to three qualifying attempts. The top nine qualifiers advance to Segment Two.

Segment Two – Held from 4:30 to 6 p.m., the top nine cars will run in reverse order based on Segment One speeds. All cars are required to make at least one attempt in Segment Two. Cars making additional attempts will receive one additional set of tire. At the end of the session, the cars are ranked 1-9 based on their four-lap average during the segment.  (Note:  The lowest any car in Segment Two can start is ninth, even if they crash in Segment Two).

BUMP DAY

Positions 25-33 will be determined based on the day’s fastest four-lap average. Once starting field is set, any qualifying attempt that is faster than a qualified entrant in positions 25 to 33 in the starting field will bump the slowest qualifier of those positions. The “bumping” entrant is placed at the rear of the field while the “bumped” entrant is removed from the field, but has the opportunity to bump its way back into the starting field as time allows.

THE BOOST

The standard boost level of 130 kPa (kilopascals) for superspeedways on the single- and twin-turbochargers of the 2.2-liter V-6 engines supplied by Chevrolet, Honda and Lotus have been upped to 140 kPa for qualifications. It will result in the addition of 40-50 horsepower.

The boost level will be 130 kPa for Miller Lite Carb Day on May 25 and Race Day on May 27.