Original sentence: For three years, the Busch Series hosted a pair of races at the track each year.In 2002, in an effort to increase competitive racing, the track's corners were turned into a progressive banking system, as the apron was paved and became part of the track, and the track's banking was varied from 4 degrees in the lower two lanes to 12% grade (about seven degrees).It was the largest speedway in New England, and later expansion has made it the largest sports venue of any type in the region.It would be the last one as well;  an uneventful race won by Jeff Burton, which had no lead changes, was the result of the experiment.The existing motorcycle circuit was redeveloped into a multi-purpose track, with NASCAR added to the popular motorcycle and SCCA races on the complex.The track also hosted open wheel racing for seven years, hosting CART from 1992-1995, then the Indy Racing League from 1996-1998.The track was opened in June 1990, after nine months of construction following the Bahre family's purchase of the Bryar Motorsports Park
Edited sentence: For 3 years, the Busch Series hosted a pair of races at the track each year.In 2002, in an effort to increase competitive racing, the track's corners were turned into a progressive banking system, as the apron was paved and became part of the track, and the track's banking was varied from 4 degrees in the lower two lanes to 12% grade (about 7 degrees).It was the largest speedway in New England, and later expansion has made this the largest sports venue of any type in the region.It would be the last one as well;  a boring race won by Jeff Burton, which had no lead changes, was the result of the experiment.The track also hosted open wheel racing for 7 years, hosting CART from 1992-1995, then the Indy Racing League from 1996-1998.The track was opened in June 1990, after 9 months of construction after the Bahre family purchased the Bryar Motorsports Park in the region and redeveloped the popular motorcycle circuit into a multi-purpose track, with NASCAR added to the popular motorcycle and SCCA races on the complex