Amongst others:
Despite all his accolades and accomplishments on the track, his greatest accomplishment of all may have come posthumously. Since his untimely death at Daytona in 2001, many safety regulations have been changed to better protect drivers from the basal skull fracture that killed Earnhardt. The HANS Device (a head and neck restraint system) was ordered mandatory, and many tracks on the circuit have implemented "soft wall" (or, Safer Barrier) technology, to shoulder some of the force of a wall collision. Since his untimely death, no driver has died in a racing accident in NASCAR's top three series.
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His nicknames were "Ironhead, "The Intimidator", "Man In Black" and "Mr. Restrictor Plate".
His aggressive driving style (in a good way) and the talent he always had on the racetrack.
Also one of the dirtiest drivers ever!
Dale Sr's most popular nickname was "The Intimidator". He was also known as "Ironhead" and "The Man in Black".