ADOT reaches halfway mark on I-10 widening project in Tucson

New lanes, interchange taking shape on freeway between Kino, Alvernon

TUCSON - The Arizona Department of Transportation has reached the halfway mark on a project to reconstruct and widen Interstate 10 between Kino Parkway and Alvernon Way southeast of downtown Tucson.

This milestone comes as drivers can expect to see major changes in the coming months on the $600 million project to modernize three miles of I-10.

The next sign of progress comes Friday night, Aug. 14, as ADOT permanently closes the I-10 interchange at Palo Verde Road. The closure allows demolition work to get underway so crews can build new travel lanes and bridges in the area.

In the fall, a new interchange will open at Country Club Road. This will be a diverging diamond interchange, only the second of its kind in the Tucson area following the 2021 opening of the I-10 interchange at Houghton Road.

Recent progress includes:

• Completing most of the pavement for the new Country Club interchange and ramp connections
• Demolition of old travel lanes along segments of I-10 so new lanes can be constructed
• Construction is well underway on new I-10 bridges over Palo Verde and Irvington roads
• Bridge girders are in place for the new Kino Parkway structure over Ajo Way
• Major elements are in place for the I-10 undercrossing between the North and South Kino Sports Complex
• Bridge girders are being placed over I-10 for the reconstructed Kino Parkway interchange

The I-10 reconstruction project began in June 2025 with the goals of reducing traffic delays and enhancing safety. Major project features include adding a third lane in each direction of I-10 and building two interchanges.

Considered the largest highway construction project in Southern Arizona history, this improvement will:

• Widen I-10 to three lanes in each direction between Kino Parkway and Alvernon Way with auxiliary lanes
• Reconstruct the interchange at Kino Parkway
• Construct a new interchange at Country Club Road that will provide access for traffic that currently uses the interchange at Palo Verde Road to allow for safer traffic movements to and from I-10
• Remove the existing interchange at Palo Verde Road
• Construct a new westbound on-ramp at the Alvernon Way interchange
• Construct an I-10 undercrossing to connect the North and South Kino Sports Complex

Throughout the project, ADOT will maintain two lanes of travel in each direction on I-10 during peak travel times while maintaining access to businesses. Construction is expected to continue through 2028.

The project is the first to result from a study completed in 2020 that recommended how to best improve mobility along a roughly 10-mile stretch of I-10 from I-19 to Kolb Road. The study also identified an alignment for an extension of State Route 210 (Barraza Aviation Parkway) along Alvernon Way that will connect I-10 to downtown Tucson.

For more information, please visit I-10KinotoCountryClub.