CASA GRANDE, AZ – On Thursday, crews from the Arizona Department of Transportation (ADOT) completed the new Interstate 10 bridges that span the Gila River, marking the end of the first of four planned segments for the I‑10 Wild Horse Pass Corridor Project. The project, which began in May 2024, aims to widen a 26‑mile stretch of the highway to three lanes in each direction, easing the daily commute between Phoenix and Tucson.
First phase details
The initial phase, costing about $71.2 million, involved removing the aging bridges and constructing new structures that are both wider and higher. The new bridges now carry three lanes in each direction with wider shoulders, according to ADOT. While the third lane is already in place, it will not open to traffic until the remaining three segments are finished.
What lies ahead
Segment 2 – Construction began in January 2026 on a 10‑mile stretch north of Casa Grande. ADOT expects the work to last roughly two years with an estimated cost of $267.9 million.
Segment 3 – Work has recently started on an 11‑mile portion that runs from the Phoenix/Chandler area south to the Gila River. This segment is projected to continue until late 2029 and carries an estimated price tag of $469.5 million.
Segment 4 – The final segment is slated to begin in 2027 or 2028, lasting about 18 months with an estimated cost of $158.4 million.
Speed limits and overall cost
During construction, ADOT has reduced the speed limit to 55 mph between Phoenix and Casa Grande to ensure worker safety. When the entire corridor is complete, I‑10 will feature three lanes all the way between Phoenix and Tucson, providing a smoother, faster travel experience for commuters and freight operators alike.
The full project is projected to cost just under $1 billion, representing a significant investment in Arizona’s transportation infrastructure and a tangible benefit for families and businesses that rely on the corridor.
Community impact
Local residents and businesses have welcomed the progress, noting that the additional lanes and improved bridges will reduce congestion, shorten travel times, and support economic growth throughout the region. The project aligns with the state’s broader goals of strengthening critical trade routes and enhancing safety for all road users.
ADOT will continue to provide updates as each segment moves forward, keeping the public informed about timelines, traffic adjustments, and any further speed‑limit changes.
Original reporting: azfamily KTVK/KPHO Phoenix (news) — read the source article.
