Drivers travelling on SR 347 should plan for overnight lane restrictions Sept. 3, and Sept. 10

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No lane restrictions scheduled through Labor Day weekend

In observance of the Labor Day holiday, there is no planned construction work scheduled from 12 p.m. Friday, Sept. 4, through the morning of Tuesday, Sept. 8.

Construction crews will be working in the median from 6 a.m. to 2 p.m. daily starting Tuesday, Sept. 8, through Thursday, Sept. 10, with no planned lane restrictions. Lane restrictions will resume at 8 p.m. Thursday, Sept. 10.

As work continues on the State Route 347 Improvement Project corridor, ADOT advises drivers to use caution and follow the posted speed limit and watch for construction personnel and equipment when traveling through all work zones.

Weeknight Work

Thursday, Sept. 3: Northbound SR 347 will be narrowed to one lane from Casa Blanca Road to Mammoth Way from 8 p.m. Thursday, Sept. 3, to 4 a.m. Friday, Sept. 4, for materials testing.
Thursday, Sept. 3: Southbound SR 347 will be narrowed to one lane from Mammoth Way to Casa Blanca Road from 8 p.m. Thursday, Sept. 3, to 5 a.m. Friday, Sept. 4, for materials testing.
Thursday, Sept. 3: Southbound SR 347 will be narrowed to one lane from Interstate 10 to Riggs Road from 8 p.m. Thursday, Sept. 3, to 5 a.m. Friday, Sept. 4, for geotechnical work.
Thursday, Sept. 10: Northbound SR 347 will be narrowed to one lane from Casa Blanca Road to Mammoth Way from 8 p.m. Thursday, Sept. 10, to 4 a.m. Friday, Sept. 11, for paving.

Project Lookahead

Daytime and overnight lane restrictions will be in place the weekends of Sept. 11 and Sept. 19. More detailed information will be provided as the construction schedule is finalized.

The project schedule is subject to change due to weather or other unforeseen circumstances.

To sign up for project updates and traffic alerts to stay in the know, please visit the project website at azdot.gov/sr347.

Real-time highway conditions are available on ADOT’s Arizona Traveler Information site at AZ511.gov, the AZ511 app (download for Apple or Android devices) or by calling 511. Drivers can set their own alerts on the AZ511 app in order to be notified when there is an incident, lane restriction or closure.

SR 347 Detours Map - Drivers travelling on SR 347 should plan for overnight lane restrictions Sept. 3, and Sept. 10

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SR 347 Improvement Project

Planned Improvements
Project Map
Public Involvement
Press Releases
Stay Informed

The State Route 347 Improvement Project will improve a 14-mile section of SR 347 between Interstate 10 and the City of Maricopa. This project corridor runs through Maricopa and Pinal counties and is primarily located within the Gila River Indian Community. Construction is currently underway and is slated for completion in late 2029.

Planned Improvements

The planned improvements include:

Adding one lane in each direction along SR 347 from I-10 to the City of Maricopa
Constructing a concrete median barrier to physically separate the directions of travel
Rehabilitating the existing pavement along that same 14-mile stretch of roadway
Constructing new grade-separated interchanges at Riggs Road and Mammoth Way
Adding turn lanes and other intersection improvements at Casa Blanca Road and Maricopa Road

Project Map

Click to Enlarge

Once complete, the SR 347 Improvement Project will provide added capacity, help alleviate congestion, and improve safety and traffic flow along this busy stretch of roadway that drivers depend on every day.

Construction on the SR 347 Improvement Project is now underway. The first phase, the pavement rehabilitation of the 14-mile project corridor, began in late June. The entire improvement project with all of the upgrades will take approximately three and a half years to complete and is scheduled to be finished by the end of 2029.

Public Involvement

ADOT and its project partners held two in-person meetings in August 2024 to present and seek input on proposed improvements to the Riggs Road traffic interchange at SR 347, as well as the SR 347 corridor widening project. These two projects are now part of the SR 347 Improvement Project.

The 2024 public meetings were held in the City of Maricopa and the Gila River Indian Community to provide an opportunity for community members to provide their input and ask questions about the projects.

Press Releases

SR 347 Improvement Project construction now underway - Jul. 7 2026

Join ADOT for a June 17 open house for SR 347 Improvement Project - Jun. 4, 2026

Highest-ranking contractor to enter negotiations for SR 347 Improvement Project - Jan. 8, 2026

Stay Informed

Subscribe to receive project updates and traffic alerts.
Call the ADOT Project Information Line at 855.712.8530.
Submit a question or comment to [email protected].
Real-time highway conditions are available on ADOT’s Arizona Traveler Information site at AZ511.gov, the az511 app (download for Apple or Android devices) or by calling 511. Drivers can set their own alerts on the AZ511 app in order to be notified when there is an incident, lane restriction or closure.