State Route 24

State Route 24 (SR 24), also referred to as the Gateway Freeway, is currently a 5-mile interim roadway between Loop 202 and Ironwood Drive. This section features two lanes in each direction with a center median, bridges over Ellsworth and Mountain roads and at-grade intersections at the following locations:

• Williams Field Road
• Signal Butte Road
• Meridian Road
• Ironwood Drive

State Route 24, Loop 202 to Ironwood Drive Improvements

ADOT is currently in the design phase to widen and make other improvements to SR 24 between Loop 202 and Ironwood Drive. The improvements include:

• Adding two general purpose lanes in each direction between Loop 202 and Williams Field Road, with SR 24 widened within the median
• Adding one general purpose lane in each direction between Williams Field Road and Ironwood Drive, with SR 24 widened within the median
• Building bridges over Williams Field, Crismon, Signal Butte and Meridian roads to fully separate SR 24 from cross street traffic
• Reconstructing the Ironwood Drive interchange to a Diverging Diamond design to improve traffic flow 
• Adding an additional lane on eastbound and westbound Loop 202 near SR 24 in the following locations:
  • Westbound Loop 202 from SR 24 to Recker Road
  • Eastbound Loop 202 from Power Road to SR 24 
  • North- eastbound Loop 202 from SR 24 to Guadalupe Road
• Constructing new connector ramps between Ellsworth Road and Loop 202 in both directions

This project is funded in part through Proposition 479, a dedicated half-cent sales tax for transportation approved by Maricopa County voters in 2024.

Timeline

Design is expected to be completed in late 2025. The project is currently planned to advertise for construction in spring 2026.

Public Meeting Information and Material

ADOT held a virtual public meeting Oct. 21 to share design plans for the planned expansion of State Route 24 from Loop 202 to Ironwood Drive. The meeting included a presentation on the project, followed by a question and answer session where the public had an opportunity to ask questions and provide comments.

MEETING MATERIAL/RECORDING

• Meeting Recording
• Meeting Presentation (English)
• Meeting Presentation (Spanish)
• Simulation
• Final Noise Report 
• Noise Analysis Memo
• Draft Air Quality Report

QUESTIONS OR COMMENTS?

Provide comments by 5 p.m. Nov. 7, 2025 in any of the following ways:

• Online Comment Form: surveyhero.com/c/ADOTSR24
• Email: [email protected]
• Phone: 855.712.8530
• Mail: ADOT Communications, 1655 W. Jackson St., MD 126F, Phoenix, AZ 85007

Renderings of SR 24 at Signal Butte Road (click to enlarge)

Renderings of SR 24 at Crismon Road (click to enlarge)

State Route 24 east of Ironwood Drive

The potential future SR 24 extension from Ironwood Drive to US 60 falls within Pinal County. The county is the lead agency for a study underway to evaluate this extension, with participation by ADOT. The extension of SR 24 is not currently funded so there is no timeframe for when SR 24 might be extended to the east. For more information, visit: https://www.pinal.gov/1814/State-Route-24-Extension-and-Central-Ari.

Interim Phase II Documents

Stay Informed

• Subscribe to receive project updates and traffic alerts.

  Submit questions and comments or request information in any of the following ways:

• Phone: ADOT Project Information Line: 855.712.8530
• Email: [email protected]
• Mail: ADOT Communications, 1655 W. Jackson St., MD 126F, Phoenix, AZ 85007