I don't even see the point for this highway...connect I-64/I-77 to US 23, which goes...where?
Sure, it's scenic, but I don't see how building a full fledged 80 some mile expressway to nowhere is supposed to stimulate economic growth or be a better route for through traffic.
I guess if you're from Eastern Tennessee and want to get to the New River Gorge?
US 23 has its southern terminus at Jacksonville, FL (here, which is where we moved to from North Jersey in late September 2017). Mackinaw City (which we have no intent on visiting anytime soon), MI is the northern terminus of US 23. Portsmouth (which we also have no intent on visiting anytime soon), OH was the original southern terminus of US 23. It has never changed its route in Florida, though at one time it was planned to extend south, maybe to Fort Myers, FL (one of our possible Gulf Coast retirement spots) via US 17, SR 19, SR 33, US 98, US 17, and SR 31.
It should also be noted that Jacksonville, FL (here) was the original southern terminus of US 17, and that US 98 was originally an intra-state route entirely within the Sunshine State, running east-west between Apalachicola, FL and Pensacola, FL along the Florida Panhandle aka West Florida. As a matter of fact, both US 29 and US 98 once ended at or close to each other within the city limits of Pensacola, FL from 1935-1936 (when the old, original aka 1926 US 331 had a brief multiplex with US 29, with both original southern termini at or close to the original western terminus of US 98 at Pensacola, FL) to 1955, when US 98 was extended west to Natchez, MS. The same thing can and should be said about both US 98 and US 319 once ending at each other within the city limits of Apalachicola, FL from 1933-1952, which is approx. 20 years.
Jacksonville, FL (here) was also once the original eastern terminus of US 90, and at first both US 17 and US 90 ended at or near each other within the pre-1967-1968 city-county consolidation limits of Jacksonville, FL until in or about 1932.
I wonder if people will confuse US 121 (currently signed as WV 121, NOT to be confused with VA 121, which was formerly an extension of old, original aka 1926 US 121, now a part of US 52, as part of the 1933 Virginia State Route renumbering) with the tri-state (FL-GA-SC) SR 121, especially since some see it as a de facto auxiliary route from U.S. Route 21 (US 21) in Rock Hill, SC. Efforts to have the road upgraded to such status have failed, however.