Sonoran Corridor (SR 410) Tier 2 Environmental Impact Study and Design Concept Report

Sonoran Corridor (SR 410) Tier 2 Environmental Impact Study and Design Concept Report

State Route 410 Sonoran Corridor Study


In 2023, ADOT initiated additional engineering and environmental studies to refine the Sonoran Corridor from a 2000-foot corridor to a proposed 400-foot freeway alignment. This study will build upon the Tier 1 Environmental Impact Statement (EIS) study and identify and evaluate the engineering and environmental considerations of various design concept alternatives for the corridor. This alignment will not only consider roadways and traffic interchanges, but also existing and future trails, railways and utilities.

A Tier 2 Environmental Impact Statement (EIS) and Design Concept Reports (DCR) will be prepared for this study, in accordance with the National Environmental Policy Act (NEPA) and other regulatory requirements. 

Selected Sonoran Corridor Route Map

Sonoran Corridor (SR 410) Tier 2 Environmental Impact Study Map


The study elements, conceptual design and public involvement to evaluate the potential construction of a new freeway are anticipated to be completed in 2026. In addition to the public involvement meetings and a hearing, there will be three tribal updates scheduled. The public will have several opportunities to provide input about this study. Check back soon for more information on upcoming public input opportunities.


Contact Us


Your input is important. ADOT welcomes your questions and comments on this study through the methods outlined below. Thank You!

Phone: ADOT Bilingual Project Information Line 855.712.8530
Email: [email protected]
Mail: ADOT Communications, Sonoran Corridor Team 1221 S. Second Avenue Tucson, AZ 85007

If you would like to be notified when updates are issued, please subscribe for email updates.