INDIANAPOLIS — Scott Dixon has run a fast lap of 226.549 mph at Indianapolis 500 practice, the only driver to top 226 on a cool, cloudy, damp afternoon on the 2.5-mile oval.

Mario Moraes has the second fastest lap at 225.913, and Alex Tagliani is third at 225.394. Marco Andretti, who is driving for his father, Michael, is seventh at 224.914, and Danica Patrick is 28th at 222.003.

The fourth day of practice started with a rain delay of a little more than an hour.

It's the fourth straight practice session that was interrupted by rain. Tuesday's practice is scheduled to end at 6 p.m., with qualifying for the May 30 race to be held Saturday and Sunday.