Construction is scheduled to begin next week on the second segment of the I-10 Wild Horse Pass Corridor Project, according to the Arizona Department of Transportation. The project aims to widen Interstate 10 from two to three lanes in each direction between Phoenix and Casa Grande.
The corridor covers about 26 miles of I-10, running from Loop 202 Santan/South Mountain Freeway to just north of Casa Grande. The upcoming construction phase will focus on a 10-mile stretch between Gas Line Road and south of State Route 387. FNF Construction, Inc. has been selected as the contractor for this segment.
Work on the third segment is planned for summer 2026, covering an 11-mile section from Loop 202 south to the I-10 Gila River bridges. This part will be managed by Coffman-Fisher joint venture. The final segment, which spans three miles between the Gila River and Gas Line Road, is expected to start in late 2026.
The first phase began in May 2024 with work on eastbound and westbound I-10 bridges over the Gila River. Crews have finished part of the new eastbound bridge and are close to completing the westbound bridge deck, with completion anticipated by late summer 2026.
Major components of the overall project include adding a third general purpose lane in each direction, introducing high occupancy vehicle (HOV) lanes from Loop 202 South Mountain/Santan Freeway to Riggs Road, reconstructing several interchanges—including Wild Horse Pass Blvd./Sundust Road and Queen Creek Road/SR 347—widening and replacing bridges over the Gila River, building new interchanges at Koli Road and Seed Farm Road, improving infrastructure, and installing freeway management systems such as fiber optic cable, cameras, and overhead messaging boards.
Upon completion, officials expect that these improvements will reduce congestion and travel times along this section of I-10. It will also mark the last portion between Phoenix and Tucson where I-10 expands from two to three lanes in each direction. The entire project is scheduled for completion by late 2029.
The Arizona Department of Transportation manages highway infrastructure across Arizona including multimodal transportation systems like highways, aviation services, motor vehicle operations, rest areas, snowplow operations with specialized equipment and highway monitoring tools such as cameras (official website, official website). The department works with various partners at regional, state, local and tribal levels on projects like corridor studies while offering traveler information through designated systems (official website). Jennifer Toth serves as director overseeing planning and operations for statewide transportation systems (official website).
