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Drivers traveling on State Route 347 should plan for lane restrictions August 20-28

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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 as 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

  1. Thursday, August 20: Southbound SR 347 will be narrowed to one lane intermittently from the Gila River Bridge (just south of Mammoth Way) to Casa Blanca Road from 8 p.m. Thursday, August 20, to 5 a.m. Friday, August 21, for geotechnical and surveying work.

  2. Starting Sunday evening, August 23: Southbound SR 347 will be narrowed to one lane at the Santa Cruz Wash Bridge nightly from 8 p.m. to 5 a.m. beginning Sunday, August 23, to Wednesday, August 26, for geotechnical work.

  3. Starting Monday, August 24: Northbound SR 347 will be narrowed to one lane from Casa Blanca Road to Mammoth Way nightly from 8 p.m. to 4 a.m. beginning Monday, August 24, to Friday, August 28, for surveying and materials testing.

  4. Starting Monday, August 24: Southbound SR 347 will be narrowed to one lane from Mammoth Way to Casa Blanca Road nightly from 8 p.m. to 5 a.m. beginning Monday, August 24, to Friday, August 28, for surveying and materials testing.

  5. Starting Tuesday, August 25: Northbound SR 347 will be narrowed to one lane at the Santa Cruz Wash Bridge nightly from 8 p.m. to 5 a.m. beginning Tuesday, August 25, to Friday, August 28, for geotechnical work.

Weekend Work

  1. Starting Friday, August 21: Northbound SR 347 will be narrowed to one lane from Casa Blanca Road to Mammoth Way 24 hours a day starting at 8 p.m. Friday, August 21, to 4 a.m. Monday, August 24, for paving.

  2. Starting Friday, August 21: Southbound SR 347 will be narrowed to one lane from Mammoth Way to Casa Blanca Road 24 hours a day starting at 8 p.m. Friday, August 21, to 5 a.m. Monday, August 24, for paving.

Project Lookahead

Daytime and overnight lane restrictions will also be in place the weekend of August 29. More detailed information will be provided as the construction schedule is finalized.

No planned construction work is scheduled from 12 p.m. Friday, September 4, through the morning of Tuesday, September 8, in observance of the Labor Day holiday.

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.

ADOT SR-347 Detour Map

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Update: Additional lane restrictions scheduled for State Route 347 at the Gila River Bridge, August 17-21

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Drivers should plan for extra travel time through the project corridor during overnight work this week.

The Arizona Department of Transportation advises drivers to plan for north- and southbound lane restrictions as work progresses in the State Route 347 Improvement Project corridor. Updated restrictions for August 17-21 are below.

Weeknight Work

  1. [UPDATE] Starting Monday, August 17: Southbound SR 347 will be narrowed to one lane at the Gila River Bridge (just south of Mammoth Way) nightly from 8 p.m. to 5 a.m. beginning tonight, Monday, August 17, to Wednesday, August 19, for geotechnical work.

  2. Starting Monday, August 17: 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 tonight, Monday, August 17, to Wednesday, August 19, for material testing.

  3. Starting Monday, August 17: Southbound SR 347 will be narrowed to one lane from Riggs Road to Mammoth Way nightly from 8 p.m. to 5 a.m. beginning tonight, Monday, August 17, to Wednesday, August 19, for material testing.

  4. [UPDATE] Starting Tuesday, August 18: Northbound SR 347 will be narrowed to one lane at the Gila River Bridge (just south of Mammoth Way) nightly from 8 p.m. to 5 a.m. beginning Tuesday, August 18, to Thursday, August 20, for geotechnical work.

Project Lookahead

Daytime and overnight lane restrictions will also be in place the weekend of August 22. More detailed information will be provided as the construction schedule is finalized.

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.

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.

ADOT SR-347 Detour Map

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SR 347 Improvement Project

SR 347 Improvement Project

Contents

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.

SR 347 Improvement Project Logo

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

A project area map depicting the SR 347 corridor improvements, including pavement, widening, intersection improvements and a new interchange.

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.

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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.