Crews have begun work on an 11-mile section of Interstate 10 between Loop 202 and the Gila River, launching the third of four segments in the I-10 Wild Horse Pass Corridor project. The Arizona Department of Transportation announced the start Tuesday. The work covers both directions of I-10 south of the Phoenix area and is part of a 26-mile program intended to reduce congestion and travel times between Phoenix and Casa Grande. The project will add a third general-purpose lane in each direction. Between Loop 202 and Riggs Road, crews will also add a high-occupancy vehicle lane in each direction. Plans include rebuilding the interchanges at Wild Horse Pass Boulevard, Riggs Road and Queen Creek Road, which connects with State Route 347. A new interchange is planned at Koli Road, between Wild Horse Pass Boulevard and Queen Creek Road. The work also includes overhead message boards, freeway cameras and systems to detect wrong-way drivers. The corridor project’s first segment began in May 2024 and involved replacing the I-10 bridges over the Gila River, about 11 miles south of Loop 202. Finishing work on the new bridges is scheduled for next month. Construction on the second segment started in January 2026 along 10 miles of I-10 from Gas Line Road to just north of Casa Grande, near the Pinal Avenue and State Route 387 interchange. That segment includes a third general-purpose lane in each direction, a rebuilt Pinal Avenue interchange, a new interchange at Seed Farm Road and changes to nearby bridges. All four segments are expected to be complete by late 2029.