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What is the longest running interstate?

#1. I-90. As the longest interstate in the U.S., I-90 connects Washington, Idaho, Montana, Wyoming, South Dakota, Minnesota, Wisconsin, Illinois, Indiana, Ohio, Pennsylvania, New York, and Massachusetts.



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Route 66 became a popular route because of the active promotion of the U.S 66 Highway Association, which advertised it as “the shortest, best and most scenic route from Chicago through St. Louis to Los Angeles.”

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Route 66 is iconic. Why? Route 66 has gained a reputation as the United States of America's most famous road.

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I-95: The Road Most Traveled : NPR. I-95: The Road Most Traveled Interstate 95 may be one of the least romantic roads ever built. But what it lacks in beauty, it makes up for in utility. How has this asphalt Amazon transformed the economy of the Eastern Seaboard?

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Interstate 90 is the longest and one of the busiest highways in America. Read the story behind this well-traveled road. When you think of the most famous and busiest highways in America, the Interstate 90 (or I-90) will come to mind for many people.

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Portions of the road have now been designated as National Scenic Byways or as “Historic Route 66” in several states including Arizona, New Mexico, Illinois, and Missouri. Vintage Shell gas station (left) built in 1926 on Route 66 in Mount Olive, Illinois (photo taken between 1980 and 2006).

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Virtually all roads, including Route 66, were functionally obsolete because of narrow pavements and antiquated structural features that reduced carrying capacity. Emergency road building measures developed during wartime left bridges and culverts woefully inadequate for postwar needs.

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US Route 50 This entire 3,000 mile route is dubbed “America's Loneliest Road.” Route 50's path cuts across the corner of Utah, passing by the Canyonlands National Park, the Arches National Park and through the vast emptiness of the Great Salt Lake Desert.

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