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  2. Interstate Highway System - Wikipedia

    en.wikipedia.org/wiki/Interstate_Highway_System

    The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly known as the Interstate Highway System, or the Eisenhower Interstate System, is a network of controlled-access highways that forms part of the National Highway System in the United States. The system extends throughout the contiguous United States and has ...

  3. List of Interstate Highways - Wikipedia

    en.wikipedia.org/wiki/List_of_Interstate_Highways

    List of Interstate Highways. There are 70 primary Interstate Highways in the Interstate Highway System, a network of freeways in the United States. These primary highways are assigned one- or two-digit route numbers, whereas their associated auxiliary Interstate Highways receive three-digit route numbers. Typically, odd-numbered Interstates run ...

  4. United States Numbered Highway System - Wikipedia

    en.wikipedia.org/wiki/United_States_Numbered...

    The United States Numbered Highway System (often called U.S. Routes or U.S. Highways) is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States. As the designation and numbering of these highways were coordinated among the states, they are sometimes called Federal Highways, but the roadways ...

  5. Numbered highways in the United States - Wikipedia

    en.wikipedia.org/wiki/Numbered_highways_in_the...

    The United States Numbered Highway System is an older system consisting mostly of surface-level trunk roads, coordinated by the American Association of State Highway and Transportation Officials and maintained by state and local governments. U.S. Highways have been relegated to regional and intrastate traffic, as they have been largely ...

  6. List of United States Numbered Highways - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States...

    3,813. Fleming and Whitehead streets in Key West, FL. Route 161 at Canadian border in Fort Kent, ME. 01926-01-01. 1926. current. Follows the East Coast of the United States, longest north-south US Highway. US 2. 2,112.

  7. Exit numbers in the United States - Wikipedia

    en.wikipedia.org/wiki/Exit_numbers_in_the_United...

    Interstate highways only). Illinois formerly did not number exits on its original Illinois Tollways, including those overlaid with Interstate Highways. Starting with I-355 (a toll road from its inception in 1989), toll roads began to be numbered according to standard mile-based exit signage. From the 1990s through the 2010s, Illinois gradually ...