The entries in question arrived at the 1.455-mile oval track mounted with higher-mileage engines, and officials decided to take a cautious approach.
INDYCAR released an entry list with 22 cars scheduled to participate in the test to gather data on the track's new surface and configuration, with plans for cars to run in groups during parts of the day to help set appropriate downforce levels for the Rainguard Water Sealers 600 race weekend June 9-10.
The action includes the full-season entries designated for Mikhail Aleshin, Max Chilton, Scott Dixon, Tony Kanaan, Sebastien Bourdais, rookie Ed Jones and Ryan Hunter-Reay. Others may be identified in technical inspection prior to the test beginning.
Test sessions are scheduled for 11 a.m.-2 p.m. and 4-7 p.m. ET today. A live video stream and timing and scoring will be available at RaceControl.IndyCar.com