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Interstate 90 (I-90) is an east–west transcontinental Interstate Highway across the northern United States, linking Seattle to Boston.The portion in the state of Montana is 552.54 miles (889.23 km) in length, passing through 14 counties in central and southern Montana.
The Interstate Highways in Montana are the segments of the Dwight D. Eisenhower National System of Interstate and Defense Highways owned and maintained by the Montana Department of Transportation (MDT) in the U.S. state of Montana. The state's Interstate highways, totaling 1,198 miles (1,928 km), were built between 1956 and 1988 at a cost of $1 ...
Interstate 90 (I-90) is an east–west transcontinental freeway and the longest Interstate Highway in the United States at 3,099.7 miles (4,988.5 km). It begins in Seattle, Washington, and travels through the Pacific Northwest, Mountain West, Great Plains, Midwest, and the Northeast, ending in Boston, Massachusetts.
Oct. 27—During the 20 years it took to build and complete Interstate 90 through Spokane to the Idaho border, progress was sometimes slow, fraught with challenging excavation project and elevated ...
The Interstate 90 exit list has been divided by state: . Interstate 90 in Washington#Exit list; Interstate 90 in Idaho#Exit list; Interstate 90 in Montana#Exit list; Interstate 90 in Wyoming#Exit list
After traveling through the Silver Valley along the Coeur d'Alene River in the Bitterroot Range, I-90 crosses into Montana at Lookout Pass. I-90 was created by the federal government in 1957, following the general route of U.S. Route 10 (US 10) and the mid-19th century Mullan Road constructed by the U.S. Army. The freeway was constructed in ...
Interstate 90 was Erie County's first superhighway. Originally conceived as a northwestern extension of the Pennsylvania Turnpike, the "Erie County Thruway" project was turned over to the state ...
The road previewed the route approximately followed by modern-day Interstate 15 and Interstate 90 through present-day Montana, Idaho, and Washington. Parts of the Mullan Road can still be traveled; one such section is near Washtucna, Washington .