If you've driven I-10 southeast of downtown Tucson in the past year, you've watched it happen lane by lane. ADOT's reconstruction of the freeway between Kino Parkway and Country Club Road is the largest highway construction project in Southern Arizona history — a $600 million rebuild that began in June 2025 and is roughly a year into a three-year schedule. As of June 2026, the year-long Country Club Road closure is in its final stretch, a brand-new interchange is rising, and the mainline is on its way from two lanes in each direction to three. For anyone on the southeast side, it's the infrastructure story that will reshape daily commutes for years. $600M — Largest highway project in Southern Arizona history. 2 → 3 — Lanes each direction, Kino Parkway to Alvernon Way. Summer 2026 — When the Country Club Road closure is expected to lift. Summer 2028 — Target completion of the full rebuild The Biggest Road Project in Southern Arizona History Per ADOT, the agency awarded the design-build contract to a Sundt-Jacobs team and broke ground in June 2025. The headline number — $600 million — makes this the largest single highway construction project the region has ever seen. The core of the work is straightforward in concept and enormous in execution: widen I-10 to three travel lanes in each direction, with auxiliary lanes between on- and off-ramps, along the stretch from Kino Parkway east to Alvernon Way. That added capacity is meant to cut the bottleneck that builds on this segment, where a fast-growing metro funnels onto a freeway that was last sized for a much smaller Tucson. What's Actually Changing on the Map The interchanges are where the layout changes most. Per ADOT, the project builds an entirely new interchange at Country Club Road, reconstructs the Kino Parkway interchange, and removes the existing interchanges at Palo Verde Road and Irvington Road. The new Country Club interchange is designed to absorb the traffic that used to move through Palo Verde, with geometry built for safer merges. There's also a piece aimed squarely at game-day and event traffic: an I-10 undercrossing connecting the north and south sides of the Kino Sports Complex, so the freeway no longer splits the venue's two halves. The result, once it's done, is a simpler, higher-capacity set of access points than the patchwork drivers navigate today. The Country Club Closure — and When It Lifts The most disruptive phase for nearby residents has been the Country Club Road closure. Per ADOT, Country Club Road closed at I-10 at 8 p.m. on September 8, 2025, to let crews relocate utilities and rebuild bridges for the new interchange. Since then it has been open to local traffic only between Irvington Road and Michigan Street, with no through traffic passing under the freeway — that closure is expected to continue through summer 2026, so as of June it should be in its final months. Two ramp changes came with it: the westbound I-10 on-ramp at Irvington Road closed permanently, and ADOT added a new westbound on-ramp at Alvernon Way to replace it. If your usual route west onto I-10 ran through Irvington, that detour is now permanent — worth knowing before you commit to a daily commute pattern in this pocket. Why This Matters If You Live, Buy, or Sell Nearby Major freeway access is one of the physical features that shapes property value and day-to-day livability, and this project rewrites it for a wide swath of the southeast side. For buyers touring homes near Kino Parkway, Country Club Road, Palo Verde, or Alvernon, it's worth understanding the finished layout, not just today's cones and detours: which ramps will exist, where the new Country Club interchange lands, and how the rebuilt segment connects to downtown and the airport. For sellers, the temporary disruption is real but time-boxed — and a wider, modernized I-10 with a new interchange is a long-term amenity, not a liability, for a corridor that has lived with an undersized freeway for decades. Living Around an Active Construction Zone Through summer 2028, expect ongoing lane shifts, overnight ramp and bridge closures, and occasional full weekend closures of segments as crews set girders. Per ADOT, the agency is committed to keeping two lanes of travel open in each direction during peak travel times and maintaining access to businesses along the corridor throughout construction. The practical advice is simple: check ADOT's project traffic alerts before relying on any single ramp, and give yourself a buffer on this stretch for the next couple of years. Schedules, ramp configurations, and closure dates change as work progresses — confirm current conditions with ADOT before planning around any one detail. Quick reference (June 9, 2026): ADOT is reconstructing I-10 between Kino Parkway and Country Club Road southeast of downtown Tucson — a $600 million project (the largest in Southern Arizona history) by a Sundt-Jacobs design-build team, begun June 2025 and targeted for completion in summer 2028. It widens I-10 to three lanes each direction with auxiliary lanes to Alvernon Way, builds a new Country Club Road interchange, rebuilds the Kino Parkway interchange, removes the Palo Verde Road and Irvington Road interchanges, and adds an undercrossing linking the Kino Sports Complex's two halves. Country Club Road has been closed at I-10 since Sept. 8, 2025 (local traffic only between Irvington and Michigan), expected to lift in summer 2026; the Irvington Road westbound on-ramp closed permanently, replaced by a new on-ramp at Alvernon Way. Two lanes each direction are kept open at peak times. Dates, ramps, and closures change — confirm with ADOT before relying on any single detail. Sources Arizona Department of Transportation — "ADOT begins project to widen I-10 between Kino, Country Club" — azdot.gov/news/adot-begins-project-widen-i-10-between-kino-country-club — accessed June 9, 2026 (work began June 2025; design-build awarded to a Sundt-Jacobs team; largest highway construction project in Southern Arizona history; widening to three lanes each direction between Kino Parkway and Alvernon Way with auxiliary lanes; new Country Club Road interchange replacing Palo Verde access; I-10 undercrossing connecting the north and south Kino Sports Complex; expected completion summer 2028). Arizona Department of Transportation — "Country Club Road closure set to begin for I-10 widening in Tucson" — azdot.gov/news/country-club-road-closure-set-begin-i-10-widening-tucson — accessed June 9, 2026 (Country Club Road closed at I-10 at 8 p.m. Sept. 8, 2025; open to local traffic only between Irvington Road and Michigan Street, no through traffic under I-10; expected to continue through summer 2026; westbound I-10 on-ramp at Irvington Road closed permanently; new westbound on-ramp added at Alvernon Way; two lanes maintained each direction at peak times with business access maintained). Arizona Department of Transportation — "I-10, I-19 improvements highlight 2026 for Southern Arizona" — azdot.gov/news/i-10-i-19-improvements-highlight-2026-southern-arizona — accessed June 9, 2026 ($600 million project continuing in 2026; reconstruction of the Kino Parkway interchange and construction of a new Country Club Road interchange; removal of the Palo Verde Road and Irvington Road interchanges). KOLD News 13 — "New construction project on Interstate 10 expected to start Wednesday" — kold.com/2025/06/25/new-construction-project-interstate-10-expected-start-wednesday — accessed June 9, 2026 (project start in June 2025; three lanes each direction with auxiliary lanes; new Country Club Road interchange; Kino Sports Complex undercrossing; roughly three-year, summer 2028 timeline). KOLD News 13 — "ADOT announces $600 million project to widen Interstate 10 near Kino Parkway" — kold.com/2024/08/21/adot-announces-600-million-project-widen-interstate-10-near-kino-parkway — accessed June 9, 2026 ($600 million cost; scope and interchange changes between Kino Parkway and Country Club Road). Tucson Sentinel — "ADOT's Interstate 10 widening between Kino & Country Club to continue in 2026" — tucsonsentinel.com/local/report/122625_adot_work_2026 — accessed June 9, 2026 (project continuing through 2026; Country Club Road closure continuing through summer 2026; two lanes maintained in each direction at peak times). Construction Equipment Guide — "ADOT Begins $600M Widening Project on I-10 Around Tucson" — constructionequipmentguide.com/adot-begins-600m-widening-project-on-i-10-around-tucson/68471 — accessed June 9, 2026 ($600 million design-build project; widening and new interchanges between Kino Parkway and Country Club Road). Dates, costs, ramp configurations, and closure timelines change — confirm current details with ADOT before relying on any single one. This post is for informational purposes only and is not an offer to sell or a solicitation of an offer to purchase real estate.