| Interstate Highways of the Idaho State Highway System | |
|---|---|
   Typical Interstate highway markers | |
 Interstate Highways highlighted in red | |
| System information | |
| Maintained by ITD | |
| Length | 611.31 mi[1] (983.81 km) |
| Formed | 1956 |
| Highway names | |
| Interstates | Interstate n (I-n) |
| US Highways | U.S. Highway n (US-n) |
| State | Idaho State Highway n (SH-n) |
| System links | |
| |
The Interstate Highways in Idaho are the segments of the Dwight D. Eisenhower National System of Interstate and Defense Highways owned and maintained by the Idaho Transportation Department (ITD) in the U.S. state of Idaho. The state has five Interstate Highways that total approximately 611 miles (983 km) in length.[1]
- ^ a b "National Highway Freight Network Map and Tables for Idaho". Federal Highway Administration. 2015. Retrieved December 11, 2022.