U.S. Route 90
U.S. Route 90 (US 90) is an east–west United States highway. Despite the "0" in its route number, US 90 never was a full coast-to-coast route; it has always ended at Van Horn, Texas with the exception of a short-lived northward extension to US 62/US 180 near Pine Springs, Texas which lasted less than a year, and the signs on that segment were changed to Texas State Highway 54, traveling from Interstate 10 (I-10) at exit 140A and heading to its northern terminus at US 62/US 180.
Kentucky Route 90
Kentucky Route 90 Spur (KY 90S) is a spur route of KY 90 in rural northern Whitley County. Although this route is not signed, the route connects KY 90 with U.S. Route 25W just south of KY 90's eastern terminus east of Cumberland Falls. KY 90S is long, and it is said to be the original alignment of KY 90's final .