"No conduct by Dan Wheldon's driving of car #77 during the course of the race including lap 11 was found to have contributed to the cause of the racing incident or its consequences," the report found. "Furthermore, no conduct by any drivers on lap 11 was found to be inconsistent with expected driving during the race."
As a result of the details of the impact, the report commented that with regard to the make and manufacturer of racing helmets for drivers, "There is no current evidence that one type is preferred and should currently be mandated over another. Even given the known nature of the head injury to Dan, the choice of helmet was specifically found not to change the consequences as to this injury."
The report did not directly address the 'open-wheel' nature of the IndyCars and whether this had been a critical factor. The new DW12 chassis includes new features that have been been criticised by some fans and drivers as "bumpers" to protect the cars from wheel-to-wheel direct contact in 2012 that might have prevented some or all of the multiple-car wreck seen at Vegas.
"IndyCar's commitment to safety was enhanced by Dan Wheldon's testing throughout 2011 of the new car to be used by IndyCar in 2012," said the CEO of IndyCar, Randy Bernard. "We are thankful for his efforts and commitment to racing."
The report concluded:
The accident was significant due to the number of race cars damaged, but more importantly due to the non-survivable injuries to Dan Wheldon. While several factors coincided to produce a 'perfect storm,' none of them can be singled out as the sole cause of the accident. For this reason, it is impossible to determine with certainty that the result would have been any different if one or more of the factors did not exist.
IndyCar is committed to safety. This report is an interim step to IndyCar's on-going efforts to improve motorsports safety. IndyCar will continue its efforts to reduce the risks of racing to all.
The 2012 racing season ushers in an era of a new IndyCar Series race car and the opportunity for unprecedented safety advancements. Dan Wheldon was instrumental in the testing and development of this new car and the safety innovations that it represents.
The thoughts, prayers and deepest condolences of IndyCar and the open wheel racing community go out to Dan's family.
The full report can currently be downloaded from related links on the article on the Indianapolis Star