I-19 and Kilometer Markers
In 2010, the Arizona Department of Transportation (ADOT) was planning to change the signs to miles. There is an ongoing debate on whether or not to keep the kiometer signs.
"I-19 set for shift to mileage signs." Arizona Daily Star. January 17, 2010. Page B1.
"Metric Interstate Divides ArizonansMetric Interstate Divides Arizonans." New York Times web site. September 14, 2010. http://www.nytimes.com/2010/09/15/us/15highway.html (accessed 11/04/2010.)