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.
Business routes of Interstate 90
Interstate 90 Business is an business spur (incomplete loop) of Interstate 90 in Ritzville, Washington, running through the city along the former alignment of U.S. Route 10, only connecting to I-90 at its west end. The business route is also signed with highway shields commemorating historic US 10. Historic US 10 continues east of the Ritzville city line for another before terminating at Interstate 90.