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WATCH FOR overnight LANE RESTRICTIONS ON EASTBOUND & westbound I-10 

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Corridor FAQs Segment FAQs Stakeholder Engagement

Corridor FAQs

The Wild Horse Pass Corridor projects are on a 26-mile portion of I-10 between Loop 202 (Santan/South Mountain Freeway) in south Phoenix and SR 387 near Casa Grande.

The purpose of the I-10 Wild Horse Pass Corridor program of projects is to increase capacity by widening the Interstate 10 by one general-purpose travel lane in each direction along a 26-mile stretch across the Gila River Indian Community (the Community) between Loop 202 (Santan/South Mountain Freeway) in south Phoenix and south of SR 387 near Casa Grande. The project will also extend the HOV lanes in each direction from Loop 202 to Riggs Road.

The project will also address capacity and operational concerns at the interchanges and crossroads along the corridor.

A third general-purpose travel lane will be added in each direction of I-10 throughout the entire 26-mile corridor. A High Occupancy Vehicle (HOV) travel lane will also be added between Loop 202 and Riggs Road. Additionally, two new interchanges will be constructed, several existing interchanges and crossroads will be constructed, several existing interchanges and crossroads will be reconstructed, and infrastructure improvements will be made throughout the corridor.

Benefits of the projects include:

  • Increased Capacity
  • Increased Safety
  • New and Improved Interchanges and Crossroads
  • Updated Infrastructure
  • Within the I-10 Gila River Indian Community Project, the existing asphalt roadways of I-10 will be removed and replaced with concrete roadways.

ADOT began the Wild Horse Pass Corridor Study in 2019. The Final Environmental Assessment and Design Concept Report were issued in February 2024. Active construction on the I-10 Bridges over the Gila River segment began in May 2024.

Construction impacts will be minimized to the greatest extent possible throughout the duration of this project. However, travelers may still experience the impact of reduced speeds narrowed lanes and shoulders; short-term closures or restrictions of I-10, ramps, or crossroads; and construction dust and noise. Travelers should anticipate delays and periodic lane restrictions throughout the duration of the project.

The Wild Horse Pass Corridor will be improved in four project segments, each with its own construction timeline. Construction on some of the project segments will overlap.

  • The I-10 Gila River Indian Community Project is anticipated to begin in late 2026 and end in late 2029.
  • The I-10 Bridges over the Gila River Project began construction in May 2024 and is expected to be completed in October 2026.
  • The I-10 Gila River to Gas Line Road is anticipated to begin in 2027 or 2028 and is expected to last 18 months.
  • The I-10 Gas Line Road to South of State Route 387 began in January 2026 and is expected to be completed in mid-2028.

All schedules are subject to change

The Corridor projects in their entirety will cost a little more than $1 billion.

Funding comes from both the state and federal level, in addition to an Infrastructure for Rebuilding America (INFRA) grant from the U.S. Department of Transportation. ADOT continues to work closely with the Gila River Indian Community and the Maricopa Association of Governments (MAG) to identify other funding opportunities.

Segment FAQs

The I-10 Gila River Indian Community Project

The I-10 Gila River Indian Community Project encompasses 11.8 miles from Loop 202 (Santan/South Mountain Freeway) at Milepost 161 to the I-10 Bridges over the Gila River Project at Milepost 172.8. The improvements include:

  • Construction of a third general-purpose lane in each direction in the median of I-10 where those do not currently exist
  • Construction of one HOV lane in each direction in the median from Loop 202 to Riggs Road
  • Paving the entire median and constructing concrete median barrier from Loop 202 to south of Riggs Road
  • Interchange improvements, all of which include the addition of sidewalks to some degree as well as pavement areas for bike lanes:
    • Wild Horse Pass Blvd/Sundust Road: Widening, lengthening the left turn storage bays, adding a second left turn lane for westbound onto I-10 eastbound, addition of right turn lanes, providing free right turns onto widened entrance ramps.
    • Queen Creek Road/SR 347: New direct-connect two-lane ramp for SR 347 northbound to I-10 westbound; addition of two free-right turns from I-10 EB exist ramp to southbound SR 347, widening SR 347to include the addition of a general purpose lane in each direction to match the SR 347 widening project, reconstruction of the existing ramps.
    • Riggs Road: Reconstruction of bridge addition of second left-turn lane for Riggs Rd eastbound to I-10 westbound, reconstruction of the existing ramps
  • Reconstruction and widening of the Goodyear Road crossroad and bridge.
  • Construction of a new interchange at Koli Road, located between the Wild Horse Pass Blvd/Sundust Road interchange and the SR 347/Queen Creek Rd interchange (crossroad connections to this TI to be designed and constructed by the Community).
  • Infrastructure improvements including freeway management systems that use a fiber optic backbone, cameras, and dynamic message signs
  • Installation of full freeway lighting from Loop 202 to Riggs Road

Construction for this project segment is anticipated to begin in late 2026 and end in late 2029.

The I-10/State Route 347/Queen Creek Road interchange will be modified to accommodate increasing traffic flow in the area. The new configuration will include:

  • Direct-connect two-lane ramp, allowing vehicles on eastbound SR 347 to enter westbound I-10 using a flyover bridge, bypassing the traffic signals.
  • Two free-flow right turn lanes from eastbound I-10 to westbound SR 347 without a traffic signal to keep traffic flowing between the two highways.
  • Right turn lanes in both directions on SR 347/Queen Creek Road allowing right turns onto the ramps without a traffic signal.
  • Extended westbound I-10 auxiliary lane from SR 347/ Queen Creek Road to SR 202.
  • Second westbound I-10 auxiliary lane from SR 347/Queen Creek Road and Koli Road.
  • One-way paved bike path to allow bikes on northbound SR 347 to leave the roadway before the direct-connect ramp to westbound I-10 to continue on Queen Creek Road traveling underneath the direct-connect ramp.

No, an extended closure of the Riggs Road bridge is not anticipated. Intermittent nightly and weekend closures will be required to construct the new bridge and remove the existing structure.

Yes, there was a noise study done on the traffic flow on this corridor.

The area does not qualify for a sound or screen wall.

The I-10 Bridges over the Gila River Project

The I-10 Bridges over the Gila River Project spans approximately one mile from Milepost 172.8 to Milepost 173.8. The improvements include:

  • Replacing the existing two-lane bridges with new three-lane bridges with wide shoulders
  • Reconstructing the existing two-lane roadway approaches as three lane roadways in each direction

Construction for this project segment began in May 2024 and is expected to end in October 2026.

I-10 Gila River to Gas Line Road Project

The I-10 Gila River to Gas Line Road Project covers 3.2 miles between Mileposts 173.8 and 177.0. Improvements include:

  • Addition of a third general-purpose lane in each direction in the median of I-10
  • Reconstruction of the existing interchange at Casa Blanca Road/SR 587
  • Reconstruction and widening of the Nelson Road bridge and crossroad
  • Infrastructure improvements including freeway management systems that use a fiber optic backbone, cameras, and dynamic message signs.

Construction for this segment is anticipated to begin in 2027 or 2028 and expected to last 18 months. It is important to understand that this small portion of the corridor cannot be striped for three lanes in each direction until such time as the adjacent project’s roadways are also expanded to accommodate three lanes in each direction.

The I-10 Gas Line Road to South of State Route 387 Project

The I-10 Gas Line Road to South of State Route 387 Project runs 10 miles, from Milepost 177 to Milepost 187. Improvements include:

  • Construction of a third general-purpose lane in each direction in the median of I-10
  • New interchange at Seed Farm Road to improve access for the Gila River Indian Community
  • Reconstruction of the existing interchange at SR 387/SR 187/Pinal Ave.
  • Reconstruction and widening of the Gas Line Road bridge and crossroad
  • Removal of the Dirk Lay Road crossroad bridge structure
  • Infrastructure improvements including freeway management systems that use a fiber optic backbone, cameras, and dynamic message signs.

Construction for this segment began in January 2026 and is expected to last two and a half years.

Stakeholder Engagement

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