List of Interstate Highways in Wyoming

Signage for Interstate 80, Interstate 180, and Interstate 80 Business
Interstate Highways highlighted in red
Highway names
InterstatesInterstate X (I-X)
Business routes:Interstate X Business (I-X Bus.)
System links
  • Wyoming State Highway System

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. It cost an estimated $570 million to build Wyoming's portion of the Interstate Highway System.

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