Arrow McLaren’s Alexander Rossi (1m05.959s) and Callum Ilott (+0.140s) led Monday’s private IndyCar test at Barber Motorsports Park. Among the 15 drivers in attendance, the two Chevy-powered drivers were among the busiest with a combined 209 laps of action around the Alabama road course that will host the fourth event — and the third points-paying race — of the year.