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  2. Numbered highways in the United States - Wikipedia

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

    State highways are of varying standards, capacity, and quality. Some state highways become so heavily traveled they may get upgraded to Interstate Highway standards. Others are more lightly traveled and have low capacity. Many state highway markers are designed to suggest the geographic shape of the state or some other state symbol such as its ...

  3. Road signs in the United States - Wikipedia

    en.wikipedia.org/wiki/Road_signs_in_the_United...

    Signs including Stop, Yield, No Turns, No Trucks, No Parking, No Stopping, Minimum Speed, Right Turn Only, Do Not Enter, Weight Limit, and Speed Limit are considered regulatory signs. Some have special shapes, such as the octagon for the Stop sign and the crossbuck for railroad crossings.

  4. U.S. Route shield - Wikipedia

    en.wikipedia.org/wiki/U.S._Route_shield

    The U.S. Route shield is the highway marker used for United States Numbered Highways. Since the first U.S. Route signs were installed in 1926, the general idea has remained the same, but many changes have been made in the details. Originally, the shield included the name of the state in which the sign was erected and the letters "U S" on a ...

  5. 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 ...

  6. Highway shield - Wikipedia

    en.wikipedia.org/wiki/Highway_shield

    Highway shield. A highway shield or route marker is a sign denoting the route number of a highway, usually in the form of a symbolic shape with the route number enclosed. As the focus of the sign, the route number is usually the sign's largest element, with other items on the sign rendered in smaller sizes or contrasting colors.

  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 ...

  8. 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 ...

  9. 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 ...