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Highway markers for State Highways 3, 75 and 200 Highway names Interstates Interstate X (I-X) US Highways U.S. Route X (US-X) System links Idaho State Highway System Interstate US State The Idaho Transportation Department (ITD) is responsible for the establishment and classification of a state highway network, including 5,000 miles (8,000 km) of roads that are classified as Interstate Highways ...
US-95 continues into Idaho from southeastern Oregon as an undivided two-lane highway for the majority of its length. As it is the state's primary north–south highway, Idaho is in the process of widening US-95 to an Interstate-style divided four-lane highway, from the Oregon state line in the southwest to Eastport at the northern border with Canada at Kingsgate, British Columbia.
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]
US. State. ← SH-19. → SH-22. State Highway 21 ( SH-21 ), also known as the Ponderosa Pine Scenic Byway, [2] is a state highway in Idaho. It runs from Boise to Stanley, primarily as a two-lane road. With two-thirds of its length in Boise County, it passes by historic Idaho City and the village of Lowman to the western edge of the Sawtooth ...
Interstate 84 ( I-84) in the U.S. state of Idaho is a major Interstate Highway that traverses the state from the Oregon state line in the northwest to Utah state line in the southeast. It primarily follows the Snake River across a plain that includes the cities of Boise, Mountain Home, and Twin Falls. The highway is one of the busiest in Idaho ...
Interstate 90 ( I-90) is a transcontinental Interstate Highway that runs east–west across the northern United States. Within the state of Idaho, the freeway travels for 74 miles (119 km) from the Washington border near Spokane to Coeur d'Alene and the panhandle region at the north end of the state. After traveling through the Silver Valley ...
Idaho State Highway 75. State Highway 75 is a two-lane highway in the western United States that travels through the Sawtooth Valley of central Idaho. The highway's southern terminus is in Shoshone, and its northern is near Challis. It is designated as one of Idaho's scenic byways and provides access to Sawtooth National Recreation Area and ...
Highway markers for U.S. Highways 2, 95, and 195 System information Maintained by ITD Highway names Interstates Interstate n (I-n) US Highways U.S. Highway n (US-n) State Idaho State Highway n (SH-n) System links Idaho State Highway System Interstate US State The U.S. Highways in Idaho are the segments of the United States Numbered Highway System owned and maintained by the Idaho ...