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Metric signs seen on roads in the U.S.

I-19 between Tucson and Nogales, AZ

(Note: The Arizona Department of Transportation has said that these thirty- to forty-year-old signs need to be replaced, but a decision has not yet been made as to whether the replacements will show metric measurements.)

I-19 metric in use

“Metric in use” sign on I-19 southbound, just north of W Ajo Way, in Tucson AZ. Photo by Chris Kobasiar, August 2012.

I-19 & I-10

Metric distance sign in Tucson, AZ, courtesy Don Hillger, September 2007.



Metric distance signs on I-19 between Tucson and Nogales AZ. I-19 from Pima County/Santa Cruz County Line to Jct. I-10 (kilometer 48 to 100) is the only route in Arizona to be signed in kilometers instead of mileposts. Top image courtesy of David Steinberg. The lower two metric signs were provided by Harry Wyeth and were included in the 2003 Sep/Oct issue of Metric Today.

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