LOUISVILLE, Ky. (WDRB) -- Officials want Indianapolis 500 visitors to turn their cars off if they are idling longer than 10 seconds this weekend.

It's an effort to improve air quality in central Indiana.

Race fans are also asked to not run their engines while tailgating. 

The U.S. Department of Energy says stopping and restarting is more efficient than idling. Idling longer than 10 seconds wastes fuel and contributes to air pollution.

For those who are choosing a more glamorous form of tailgating at the Indy 500, there's "glamping."

More than 300,000 people are expected at the Indianapolis 500, and a few will be glamorous camping..

For a $1,000 ticket, you get your own tent in the infield at the Indianapolis Motor Speedway.

It comes complete with beds, chairs and tables, as well as private bathrooms and showers.

The Indy 500 is on Sunday and is sold out for the first time.

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