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Public meeting Thursday on recommended Sonoran Corridor routes

Proposed freeway would connect I-10, I-19 south of Tucson airport
March 04, 2019

PHOENIX – Southern Arizona residents can review and provide feedback on three recommended potential corridors for the proposed Sonoran Corridor at a public meeting in Tucson on Thursday, March 7.

The three recommended alternatives were selected from 10 options presented at a public meeting in Tucson in September. Those 10 options were reduced to three after an analysis that included public comments as well as a review of environmental considerations as well as impacts on wildlife habitat and cultural resources.

The recommendations will be available for review from 5:30 p.m. to 7:30 p.m. Thursday, March 7, at the DoubleTree Suites Tucson Airport, 7051 S. Tucson Blvd. A presentation from the Arizona Department of Transportation will begin at 6 p.m.

The Sonoran Corridor would connect Interstate 10 and Interstate 19 south of Tucson International Airport. It has been designated as a high-priority corridor under the federal Fixing America’s Surface Transportation (FAST) Act. There is no timeline for building a freeway in the corridor.

A new freeway in that area would support the economy of southern Arizona and the state. It also would reduce travel distances south of Tucson and relieve congestion at the current interchange of I-10 and I-19 southwest of downtown Tucson.

In the process creating a Tier 1 Environmental Impact Statement, officials are identifying and studying a range of possible corridors along with the opportunities and constraints of each. The study considers the potential social, economic and natural environment impacts of the alternatives, as well as the impact of not building a freeway in this area. The study, which began in 2017, is expected to be completed in 2020.

The study is evaluating multiple 2,000-foot-wide corridor alternatives, including a no-build alternative and multiple build alternatives, to determine a recommendation that is based on technical analysis and other factors, including public input.

A future Tier 2 environmental study would advance the Tier 1 recommendations to identify the specific project alignment, effects and mitigation. There is no timeline or funding identified for the Tier 2 study.

For more information about this study, please visit

Public comment, an important part of the review process, is welcome at this week’s meeting or can be sent to ADOT in several ways:

  • Email:
  • Toll-free bilingual information line: 855.712.8530
  • Mail: Sonoran Corridor Tier 1 EIS Study Team, c/o Joanna Bradley. 1221 S. Second Ave., Mail Drop T100, Tucson, AZ 85713
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