List of Interstate Highways in Wyoming explained

Shields:	State: WY Type: I Route: 80 State: WY Type: I Route: 180 State: WY Type: BL Route: 80
Caption:	Signage for Interstate 80, Interstate 180, and Interstate 80 Business
Interstate:	Interstate X (I-X)
Label1:	Business routes:
Field1:	Interstate X Business (I-X Bus.)
Links:	WY
Map Custom:	yes
Map Notes:	Interstate Highways highlighted in red

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 914miles 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]

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Notes and References

1. Web site: Waggener . John . June 21, 2021 . 65 Years Ago: Ellis Armstrong and America's Interstate Highway System . . November 13, 2022.
2. News: October 10, 1985 . Wyoming, Montana officials dedicate 10-mile section of I-90 near Sheridan . B1 . . . . November 13, 2022.