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Interstate 19
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interstate highways in arizona
   
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Interstate| Information

  Route Type short
  Article Route 19
  Shield Ext
  Type See Also
  Year Established
  Length Mi 6335
  Length Km 10195
  Direction A South
  Direction B North
  Terminus A MX 15 at Mexican Border at Nogales, AZ


Interstate 19 (abbreviated '''I-19''') is an Intrastate Interstate Highway located entirely within the state of Arizona , United States . It goes from Nogales, Arizona at the Mexican Border to Tucson, Arizona at Interstate 10 .


MAJOR CITIES

Bolded cities are officially-designated Control Cities for signs.


INTERSECTIONS WITH OTHER INTERSTATES



SPUR ROUTES

None

: There are two Business Loops: One in Tucson, Arizona , and the other in Nogales, Arizona .


INTERCHANGES FROM SOUTH TO NORTH


Arizona



HISTORY

The entire route follows or is adjacent to the routing of (former) U.S. Highway 89 .


NOTES


  • Interstate 19 is unique amongst US Interstates, because signed distances are given in Kilometer s, and not Mile s. Speed limit signs give speeds in miles-per-hour, however. According to the Arizona Department of Transportation, metric signage was originally placed because of the " Metric System Push " in the United States at the time of the original construction of the highway. Infrequently, re-signing the highway to miles is discussed, but the costs involved would be too high for a rural Interstate such as I-19.





REFERENCES