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Circular highway shield

A circular highway shield for route 110

An elongated "circular" highway shield for route 110

A circular highway shield is a route marker consisting of a number superimposed on a circle. It is officially used for state highways in Delaware, Iowa, Kentucky, Mississippi, New Jersey, and Oklahoma, though Oklahoma will soon be changing to a state-outline design [1]. It is also officially used in Virginia for state secondary and frontage routes. Many road maps of areas in the United States use a circular highway shield as a generic marker for all state highways, because other designs are difficult to print and read.

Since three-digit route numbers are often too wide to fit in a circle of the same size and shape as a regular shield, some states horizontally elongate the circle. Other states will condense the typeface used, giving the numbers a tall, slender appearance.

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This guide is licensed under the GNU Free Documentation License. It uses material from the Wikipedia.