Led by Dutchman Robert Doornbos at a top speed of more than 221 mph (356 kph), four of six Indianapolis 500 rookies completed their mandatory driving test and were cleared to begin full practice for the May 24 race.
Doornbos, Raphael Matos of Brazil, Alex Tagliani of Canada and Mike Conway of England completed 10 consecutive laps in each of four speed brackets during the opening rookie session on Tuesday. Nelson Philippe of France and Stanton Barrett of the United States began the test and will continue on Wednesday. Pole-position qualifying is on Saturday.
Doornbos' top lap was 221.735 mph (356.83 kph).
The only faster drivers were veterans Paul Tracy at 223.089 mph (359.01 kph) and Scott Sharp at 221.735 mph (356.83 kph). Both were taking refresher tests because they have not competed in an Indy car this year.