Interstate 90

Interstate 90 is the longest Interstate Highway in the United States, stretching approximately 3,020 miles from Seattle, Washington, on the West Coast to Boston, Massachusetts, on the East Coast. This coast-to-coast route crosses 13 states and links major urban centers such as Chicago, Cleveland, Buffalo, and Spokane. It serves as a critical transportation corridor for cross-country travel, freight movement, and regional commuting.

I-90 traverses a wide variety of terrains and landmarks, including the Cascade Mountains, the plains of South Dakota, the Great Lakes region, and the rolling hills of New England. Along the way, drivers encounter national parks, historic sites, and scenic byways, including a concurrent stretch with the historic Massachusetts Turnpike, Ohio Turnpike, and Chicago Skyway. Other tolled segments include the New York State Thruway and Indiana Toll Road. Notably, the highway also crosses the Continental Divide at Homestake Pass in Montana.

Major junctions include interchanges with I-5 in Seattle, I-25 in Wyoming, I-35 and I-94 in the Midwest, and I-95 in Boston. I-90’s strategic route and impressive length make it a backbone of the national highway system, connecting a diverse range of climates, cultures, and communities across the northern United States.