Wheldon accident ? ' `` Is the track big enough to accommodate 34 racing cars ? Is the track too fast to have 34 racing cars within a mile-and-a-half racing circuit ? Will that change ? '' Stewart also questioned the wisdom of mixing drivers with varying levels of IndyCar experience in such a high-speed environment . `` Will the caliber of driver be high enough to be able to control those cars at those kinds of speeds ? In yesterday 's race there were a good many drivers in there who were not regulars and were not fulltime IndyCar drivers . I think that 's a consideration that has to be looked at . '' Motorsport reacts to Wheldon tragedy During Stewart 's eight years in F1 racing for the BRM and Tyrrell teams from 1965-73 , the Scot witnessed 11 driver deaths . But the elite motorsport 's last casualty was in 1994 when the legendary Brazilian Ayrton Senna crashed at the San Marino Grand Prix , while IndyCar has seen four deaths in the last 15 years . `` In the period that I was racing , there was a two out of three chance you were
-LRB- CNN -RRB- -- The tragic death of English driver Dan Wheldon after a horror race crash in the U.S . should lead to changes in the IndyCar division , according to Formula One legend Jackie Stewart . Two-time Indy 500 winner Wheldon lost his life on Sunday after a multi-car collision on the 11th lap of the 2011 IndyCar World Championship 's final race at the Las Vegas Motor Speedway . Stewart , who won Rookie of the Year at the 1966 Indy 500 before becoming a three-time F1 champion , told CNN that such a tragedy will prompt the sport to re-evaluate the current safety measures . `` Unfortunately , when accidents occur , it 's then that the more creative minds get moving on changing things , '' said the 72-year-old , who successfully campaigned for better safety precautions during his career . `` Some of them may be simple to change , some of them may be more complicated , but surely change occurs . Wheldon 's death a watershed moment for IndyCar ? `` A lot of people will be thinking , ` What are we going to have to do to avoid the Dan