Foothills Parkway Spur opens as a Gatlinburg Bypass 1975 Rand McN

Foothills Parkway between US 321 Cosby and I-40 1989 Official

By the late 1980s, the segment from Walland to the Carrs Creek Rd overpass was completed, but it is unclear how long it was opened to traffic before the parkway was completed to US 321 decades later. Historic aerials do show a connector road between Carrs Creek Rd and the parkway but it is not clear if that was just for construction traffic. Some maps, such as the 1985 Blount County map also suggest this dead end segment was open. The segment was completely closed at some point and between 2007-09 the segment stopped appearing on official maps.
In 2018, the parkway was opened from Walland to US 321 Townsend
For some reason 2018 Officials and later show the (unlabeled) right of way for the entire Foothills Parkway, but do not show any road segments.

Foothills Parkway open from US 129 past Walland 1971 Official

Foothills Parkway open to Carrs Creek Rd 1981 Blount County

Foothills Parkway closed between Walland and Carrs Creek Rd 2009 Official

Posting: Unlike the more famous Blue Ridge Pkwy, there do not appear to be independent Foothill Pkwy shields
Secret TN Route Overlay: None
Comment: The parkway is now an 80-year old unfinished project, with no evidence that any more of the unfinished portions are going to be built.