Ben Bergman/KPCC

Even though they aren't old enough to rent a car themselves Kevin Petrovic, 19, (right) and Rujul Zaparde, 18, are trying to shake-up the $11 billion airport rental car market.

What if instead of paying to park your car at the airport, someone paid you to leave it there?

That's the idea behind a new company called "Flightcar", that opens its third location at LAX today. The catch: while you're away, other people could be driving your car. KPCC's Ben Bergman explains.