According to this June 18, 2001 article  from the Bowling Green Daily News the Kentucky Transportation Cabinet has considered reconstructing KY 259 from the current I-65 and Louie B. Nunn Cumberland Parkway to the intersection of KY 259 and KY 101 near Brownsville. A public meeting on this issue was held in July of 2001. An early report on the proposal can be found here . This project is in the same area as the proposed I-66.