I-90 is the longest Interstate Highway in the United States, spanning 3,021 miles (4,862 km) across the northern portion of the coterminous part of the country. The transcontinental freeway passes through 13 states in the See more

I-90 carries several commemorative names designated by state governments, some of which are shared between multiple states. Washington and Minnesota … See more

Source: FHWA
• Rapid City, South Dakota: I-190
• Chicago, Illinois: I-190, I-290
• Cleveland, Ohio: I-490
• See more

• Geographic data related to Interstate 90 at OpenStreetMap
• I-90 at Interstate-Guide.com See more

Predecessors and establishment
An east–west controlled access highway to serve the Northern United States was proposed in the early 20th century in several federal … See more

Washington SR 519 in downtown Seattle I-5 in downtown Seattle I-405 in Bellevue near Seattle I-82 / US 97 in Ellensburg US 395 in Ritzville; joined for 61 miles (98 km) until Spokane US 2 / … See more

• Business routes of Interstate 90 See more