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In that list of fatalities in the article, two of those, Tony Renna's and Dan Wheldon's were the due to the cars becoming airborne, with air getting under the car and flipping it, which was a problem with the old Dallara as it was flat bottomed. Both Ryan Briscoe's and Mike Conway's accidents were also caused the same way and there were others. The new car is ground effect and with venturi tunnels on the underside of the car it won't flip like a flat bottomed car, as was seen in Marco Andretti's and Graham Rahal's crash at Long Beach. A contributing factor was the wheel to wheel pack racing. One car would ride up the rear wheels of another and the air would get underneath. That's now a thing of the past and I think we'll see very few accidents involving catch fencing but that doesn't rule it out. Maybe the solution is to make the safer barrier that much higher?
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