.svg) .svg)  Signage for Interstate 80, Interstate 180, and Interstate 80 Business | |
 Interstate Highways highlighted in red | |
| Highway names | |
|---|---|
| Interstates | Interstate X (I-X) |
| Business routes: | Interstate X Business (I-X Bus.) |
| System links | |
| |
The Interstate Highways in Wyoming are the segments of the Dwight D. Eisenhower National System of Interstate and Defense Highways owed and maintained by the Wyoming Department of Transportation. It comprises 914 miles (1,471 km) on four routes as well as Business Interstate Highways. Construction began in September 1956 on Interstate 25 (I-25) and the network was completed in October 1985.[1] It cost an estimated $570 million to build Wyoming's portion of the Interstate Highway System.[2]
- ^ Waggener, John (June 21, 2021). "65 Years Ago: Ellis Armstrong and America's Interstate Highway System". American Heritage Center. Retrieved November 13, 2022.
- ^ "Wyoming, Montana officials dedicate 10-mile section of I-90 near Sheridan". Casper Star-Tribune. Associated Press. October 10, 1985. p. B1. Retrieved November 13, 2022 – via Newspapers.com.