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orig americas only metric highway great american story nws_00023406
orig americas only metric highway great american story nws_00023406

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    America's only metric highway

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America's only metric highway

A remnant of the Jimmy Carter era, Interstate 19 in southern Arizona is the only metric highway in the United States.

America's only metric highway

A remnant of the Jimmy Carter era, Interstate 19 in southern Arizona is the only metric highway in the United States.