U.S. Route 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.