Active construction is underway on another stretch of Interstate 10 south of Phoenix. The Arizona Department of Transportation announced October 5 that crews on the I-10 Wild Horse Pass Corridor Project have started work on an 11-mile segment, in both directions, between Loop 202 (Santan/South Mountain freeways) and the Gila River (via ADOT).
This is the third of four segments in the 26-mile corridor between Phoenix and Casa Grande. In this section, crews will:
- Add a third general purpose lane in each direction
- Add an HOV lane in each direction from Loop 202 to Riggs Road
- Rebuild the interchanges at Wild Horse Pass Boulevard, Riggs Road and Queen Creek Road/SR 347
- Build a new interchange at Koli Road, between Wild Horse Pass Boulevard and Queen Creek Road/SR 347
- Install overhead message boards, freeway cameras and wrong-way detection systems
Work on other segments is already well along. Replacement of the I-10 bridges over the Gila River began in May 2024, and ADOT says the finishing touches are scheduled for November. The second segment, a 10-mile stretch from Gas Line Road to just north of Casa Grande near the Pinal Avenue/SR 387 interchange, started in January 2026. That work includes a third lane each way, a rebuilt Pinal Avenue/SR 387 interchange, a new interchange at Seed Farm Road, a wider Gas Line Road bridge and removal of the Dirk Lay Road bridge over I-10.
ADOT expects all four segments to be finished by late 2029. The goal, according to the agency, is to reduce congestion and travel times for people commuting between the Phoenix and Casa Grande areas. More details are on the project website.
Why it matters for Contractors
This corridor is a main route for crews and material deliveries moving between the Valley and Pinal County. With active work on multiple segments, plan for possible restrictions and slower trips through 2029, and build extra time into schedules and delivery windows for jobs south of the Valley. Once finished, the added lanes and new interchanges should make those jobs easier to reach.