For the longest time, the Pennyrile Parkway, the western third of the Western Parkway, and the William Natcher Parkway were an intrinsic part of travelers' lives. Part of the WK Parkway became Interstate 69 in 2008. The Natcher Parkway transformed to Interstate 165 in 2019. But I-66 is off the table, despite the presence, years ago, of signs that read "Future I-66 Corridor." Interstate 67There was also a brief flirtation with an Interstate 67 that would've connected Interstate 65 at Bowling Green, Kentucky to Interstate 69 somewhere in Indiana.