The qualifying format for the Indianapolis 500 is rather more complicated than that used in Formula 1.
Firstly qualifying is held over two days, the Saturday and Sunday the weekend before the race.
The running order for qualifying is decided by a random draw made following the "Fast Friday" practice session.
Each car is allowed two warm-up laps before beginning their qualifying attempt. A member of the team will wave a green flag on the main straight if the lap will be the start of a qualifying run.
Rule 184.108.40.206 of the IndyCar regulations states that "A completed Qualifications attempt shall consist of four (4) consecutively timed laps."
Each driver can make three attempts at qualifying, but by starting a new attempt it automatically forfeits their previous time.
The top nine cars in Saturday's session progress to a shootout for the front three rows of the grid on Sunday.
The remaining entrants will also drive again on Sunday, with all times from Saturday erased as they fight for positions 10-33.
That is then followed by the "shootout" as the nine quickest drivers from Saturday battle for positions 1-9 on the grid.
The qualifying running order will appear here once the draw is made on Friday night.
You can see if Fernando Alonso can take pole position for the 2017 Indy 500 by following our live blog on Saturday and Sunday evening.