Arizona State Route 189

State Route 189 (SR 189) is a highway in Santa Cruz County, Arizona that runs from its junction with Interstate 19 to the US-Mexico Border. It is a north–south route for its entirety.

State Route 189
Mariposa Road
SR 189 highlighted in red
Route information
Maintained by ADOT
Length3.75 mi[1] (6.04 km)
Existed1956–present
Major junctions
South end Fed. 15D at Mexican border in Nogales
  I-19 in Nogales
North end I-19 BL in Nogales
Highway system
  • Arizona State Highway System
← SR 188→ US 191

The highway is a portion of, and the southern terminus of the United States section of the CANAMEX Corridor, a trade corridor that stretches north from Mexico across the United States to the Canadian province of Alberta.

Route description

SR 189 is a 3.75-mile (6.04 km) state highway that is completely within the city limits of Nogales. The southern terminus is the Nogales-Mariposa Port of Entry on the Mexico border. From the border, the highway heads north before curving towards the east to an interchange with I-19. SR 189 continues east from the interchange to its northern terminus at the I-19 Business Route. It also serves as a bypass route for truck traffic to and from Mexico, avoiding the busier border crossing at North Grand Ave in central Nogales.[1][2]

History

The route was originally established as a state highway in 1956, from Interstate 19 in Nogales to U.S. Route 89. In 1974, the route was formally established in the city of Nogales with its current routing from the Mexican border to I-19 Business. In 1979, the section east of I-19 was given to the county, but it was given to the city of Nogales instead in 1980.[3]

In March 2018, plans were announced for improvements to the highway including additional overpasses and better access/exit ramps at the I-19 interchange to increase capacity. The project will be partly funded with $25 million from the US government, according to US Representative Martha McSally.[4]

Future

The Fixing America's Surface Transportation Act of 2015 formally designated I-11 throughout Arizona, which includes an upgraded SR 189 as part of the future highway's alignment. This alignment will bypass the cities of Nogales, Arizona and Nogales, Sonora and directly connects I-11 with a direct freeway connection to the United States-Mexican Border with Mexican Federal Highway 15D.[5]

Junction list

The entire route is in Nogales, Santa Cruz County.

mi[1]kmDestinationsNotes
0.010.016 Fed. 15D southUnited States-Mexico border; continuation into Mexico
2.974.78 I-19 – Nogales, TucsonI-19 exit 4
3.756.04 I-19 BL (Grand Avenue)Northern terminus; continues east as Calle Sonora
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
  •       Tolled

References
  1. Arizona Department of Transportation. "2008 ADOT Highway Log" (PDF). Retrieved 2008-04-09.
  2. Google (April 17, 2008). "overview map of SR 189" (Map). Google Maps. Google. Retrieved April 17, 2008.
  3. Arizona Department of Transportation. "ADOT Right-of-Way Resolutions 1956-P-260, 1966- -041, 1974-09-A-027". Retrieved February 2, 2011.
  4. "Feds to Arizona $25M to improve road between I-19, Mexican border". KTAR.com. March 7, 2018. Retrieved March 9, 2018.
  5. Lamb, Eleanor (September 12, 2018). "Arizona DOT Prepares for Future Interstate 11". ttnews.com. Transport Topics Publishing Group. Transport Topics. Retrieved October 27, 2018.

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