Drivers traveling on State Route 347 should plan for lane restrictions, August 6-14

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Drivers should plan for extra travel time through the project corridor during overnight and weekend work in August.

The Arizona Department of Transportation advises drivers to plan for north- and southbound lane restrictions, August 6 to August 14, as paving work progresses in the State Route 347 Improvement Project corridor.

ADOT advises drivers to use caution and be prepared to slow down, follow the posted speed limit and merge safely when approaching and traveling through all work zones. Drivers should allow for extra travel time and watch for construction personnel and equipment.

Weeknight Work

Thursday, August 6: Southbound SR 347 will be narrowed to one lane from Riggs Road to Mammoth Way from 8 p.m. Thursday, August 6, to 5 a.m. Friday, August 7, for paving.
Thursday, August 6: Northbound SR 347 will be narrowed to one lane from Mammoth Way to Riggs Road from 8 p.m. Thursday, August 6, to 4 a.m. Friday, August 7, for surveying.
Monday, August 10: Northbound SR 347 will be narrowed to one lane from Mammoth Way to Riggs Road nightly from 8 p.m. to 4 a.m. beginning Monday, August 10, through Wednesday, August 12, for paving.
Monday, August 10: Southbound SR 347 will be narrowed to one lane from Riggs Road to Casa Blanca Road nightly from 8 p.m. to 5 a.m. beginning Monday, August 10, through Friday, August 14, for paving and surveying.
Thursday, August 13: Northbound SR 347 will be narrowed to one lane from the City of Maricopa to Riggs Road from 8 p.m. Thursday, August 13, to 4 a.m. Friday, August 14, for paving and surveying.

Weekend Work

Starting Friday, August 7: Northbound SR 347 will be narrowed to one lane from Mammoth Way to Riggs Road 24 hours a day starting at 8 p.m. Friday, August 7, through 4 a.m. Monday, August 10, for paving.
Starting Friday, August 7: Southbound SR 347 will be narrowed to one lane from Riggs Road to Mammoth Way 24 hours a day starting at 8 p.m. Friday, August 7, through 5 a.m. Monday, August 10, for paving.

Project Lookahead

Daytime and overnight lane restrictions will be in place the weekends of August 15 and August 22. 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, 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 (available for Apple and Android devices), or by calling 511. Drivers can set their own alerts in the AZ511 app to be notified of incidents, lane restrictions, or closures.

State Route 347 lane restrictions Map August 8, 2026

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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.