- Associated Press - Saturday, October 4, 2014

TUCSON, Ariz. (AP) - A stretch of a southern Arizona highway is lined with road signs that tell drivers how many kilometers they are from their destination - not how many miles.

The markers from Nogales to Tucson are a relic of a failed Carter administration pilot program that aimed to convince Americans to adopt the system of measure in use across much of the rest of the world.

The roughly 60-mile stretch (or about 100 kilometers) is the only continuous highway in the U.S. with metric signs, and it’s the subject of a long-simmering spat over whether they should be changed back to the standard system.

An attempt to swap out the signs failed four years ago as business leaders argued for keeping the signs as they were.

Arizona Department of Transportation officials say they plan on seeking public comment before deciding whether the new signs should be in kilometers or miles.

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