State Route 189 (locally known as Mariposa Road) is a 3.75-mile long, ADOT-maintained highway in Nogales, Arizona. SR 189 runs from Interstate 19 to the US-Mexico Border.
ADOT is currently working on two separate improvement projects for the roadway:
In addition, ADOT and the City of Nogales are working to develop a pedestrian circulation plan for downtown Nogales and the vicinity of the Mariposa Land Port of Entry. For more information on that project, please visit the project site.