Question: why did nhra change to 1000 feet?
Answer: NHRA cuts race distance to 1000 feet: Move made to enhance safety after Kalitta's death. The NHRA has cut the race distance for its Top Fuel and Funny Car classes to 1000 feet--320 feet short of a quarter-mile--as a safety measure in the wake of the death of racer Scott Kalitta nearly two weeks ago.