Main articles: Safety in NASCAR and Death of Dale Earnhardt
Although NASCAR frequently publicizes the safety measures it mandates for drivers, these features are often only adopted long after they were initially developed, and only in response to an injury or fatality. The impact-absorbing "SAFER Barrier" that is now in use had been proposed by legendary mechanic Smokey Yunick during the 1970s, but his idea had been dismissed as too expensive and unnecessary. Only after the deaths of Kenny Irwin, Tony Roper, Adam Petty, and Dale Earnhardt in 2000 and 2001 did NASCAR revisit the idea of decreasing the G-forces a driver sustained during a crash. Other examples of available safety features that were slow to be implemented include the mandating of a throttle "kill switch". The "kill switch" was mandated after the death of Adam Petty, along with the requirements of an anti-spill bladder in fuel cells. Fire-retardant driver suits were required only after the death of Glen "Fireball" Roberts, who died from complications of burns suffered in a crash when flames engulfed his car during a Talladega race. Dale Earnhardt was killed after he received massive head and neck trauma from a hard crash in the 2001 Daytona 500. Earnhardt's death prompted NASCAR to require all drivers to use the "HANS Device" (Head And Neck Support Device), a device that keeps the driver's neck from going forward in a wreck. In the mid 2000s, NASCAR redesigned the racing vehicle with safety improvements, calling it the Car of Tomorrow. The car has a higher roof, wider cockpit, and the driver seat was located more toward the center of the vehicle.
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