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 a business loop of Interstate 90 in Gillette. It runs from diamond interchanges at exit 124 and at exit 128. The route also carries the north end of WY 50 and US 14/16. A State of Wyoming "Port of Entry" can be found at the east end of the business loop.