State Route 189 Nogales improvements to begin two years early

State Route 189 Nogales improvements to begin two years early  

A project to improve State Route 189 will begin in 2019, two years ahead of schedule.

A $25 million appropriation passed by the Arizona Legislature and signed by Gov. Doug Ducey accelerates the project so the work can begin sooner. Another $40 million in federal funds will also go toward improvements of the route.

The 2019 project focuses on a 3.75-mile section of SR 189 in Nogales and will build a flyover ramp that connects the route to northbound Interstate 19.

The Mariposa Port of Entry in Nogales is one of the busiest in the country, serving as the gateway for much of the winter produce entering the U.S. It is a major trade hub between the U.S. and Mexico.

“Mexico is Arizona’s largest international trading partner, and improving how trade moves along this critical route in Nogales will help grow Arizona’s economy,” Ducey said. “Getting this work started sooner is another way Arizona is moving at the speed of business.”


Other improvements for SR 189 -- known as Mariposa Road -- include a widened exit ramp from southbound I-19 to SR 189, a raised median and improvements at intersections with Grand Avenue and Target Range Road.

“These improvements to SR 189 are essential because the Mariposa Port of Entry is one of the busiest ports along the U.S.-Mexico border,” ADOT Director John Halikowski said. “SR 189 may be one of the shortest routes on the state’s highway system, but it is one of the most critical when it comes to commerce and trade.”

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