Overview

The Arizona Department of Transportation, in partnership with the Gila River Indian Community and Maricopa Association of Governments, is proposing to construct improvements along SR 347, between Interstate 10 (I-10) and the northern limits of the city of Maricopa.

The corridor widening project is included in the Regional Strategic Transportation Infrastructure Investment Plan and the northern portion of the corridor (from I-10 to Riggs Road) will be funded in part through Proposition 479, a dedicated half-cent sales tax for transportation approved by Maricopa County voters in 2024.

Project Elements

The project team will evaluate:

• Widening SR 347 by one lane in each direction, primarily toward the median (or outside – where required) from the city of Maricopa Limits (MP 175.7) to I-10 (MP 189.1).
• Widening existing bridges at Santa Rosa Wash, Santa Cruz Wash and Gila River.
• Extending box/pipe culverts as needed.
• Intersection improvements at Casa Blanca Road, Borgia Road (Sacate Road), Mammoth Way (Cement Plant Access Road) and Old Maricopa Road to accommodate a six lane highway.
• Casa Blanca Road and Mammoth Way Intersections: Additional modifications to improve traffic flow and safety are planned at these two intersections. (These improvements will take place on a different timeline than the other project elements.)

Project Area

Alternatives Being Considered

The project team has developed two alternative design concepts for the Casa Blanca Road/SR 347 intersection to make improvements for traffic flow and safety.

Casa Blanca Road Intersection Alternative 1 -  Florida T

The Casa Blanca Road Alternative 1, commonly referred to as a ‘Florida T,’ would make the following improvements to the existing “Standard T” signalized intersection:

• Left-turning traffic from Casa Blanca Road onto SR 347 will enter a new acceleration lane to get up to speed before merging into SR 347 traffic. A four-foot buffer area between the acceleration lane and existing lanes on SR 347 would be included to provide additional space between the SR 347 traffic lanes.
• Southbound traffic on SR 347 will be free-flowing and not have to stop for the traffic entering from Casa Blanca Road.
• The southbound SR 347 left turn lane onto Casa Blanca Road and the northbound SR 347 right turn lane at Casa Blanca Road will be lengthened to allow more vehicles to wait to turn and reduce back-ups for through-traffic. 
• Casa Blanca traffic turning right onto northbound SR 347 will also be able to turn freely without having to stop at the signal, with the addition of a dedicated right-turn lane and an extended acceleration lane to merge into northbound SR 347 traffic.

Casa Blanca Road Intersection Alternative 2 - Improved Standard T

The Casa Blanca Road Alternative 2, or an Improved Standard T, would make the following improvements to the existing standard ‘T’ signalized intersection:

• The southbound SR 347  left turn lane to Casa Blanca Road will be lengthened to allow for more vehicles to wait to turn, reducing back-ups for through- traffic. 
• The northbound SR 347 right turn lane to eastbound to Casa Blanca Road will also be extended. 
• Casa Blanca Road traffic turning right onto northbound SR 347 will also be able to turn freely without having to stop at the signal, with the addition of a dedicated right-turn lane, and an extended acceleration lane to merge into northbound SR 347 traffic.

Mammoth Way Intersection – Proposed Improvements

The proposed improvements proposed at the Mammoth Way intersection would make the following improvements to the existing standard ‘T’ signalized intersection:

• The southbound SR 347 left turn lane and the northbound right turn lane to Mammoth Way will be lengthened to allow for more vehicles to wait to turn, reducing back-ups for through-traffic. 
• The eastbound left turn lane into the cement plant will also be lengthened. 
• Traffic turning right from Mammoth Way onto northbound SR 347 will be able to turn freely without having to stop at the signal, with the addition of a dedicated right-turn lane, and an extended acceleration lane to merge into traffic.

Borgia Road Proposed Improvements

Proposed improvements to the non-signalized intersection at Borgia Road would include:

• Adding an extended eastbound right turn lane from SR 347 to Borgia Road.
• Adding a dedicated right-turn lane from Borgia Road to northbound SR 347. Traffic turning right onto northbound SR 347 would be able to turn freely without having to stop with the new lane and the addition of an acceleration lane to merge into traffic.

Maricopa Road Intersection - Proposed Improvements

Proposed improvements to the existing ‘Florida T’ signalized intersection at Maricopa Road include:

• Lengthening the acceleration lane for traffic turning south to SR 347 from Maricopa Road. 
• Maricopa Road traffic will be able to turn right freely onto SR 347 without stopping at the signal. 
• A second left turn lane to northbound Maricopa Road will be added on SR 347 to allow for more vehicles to wait at the signal and reduce back-ups at the intersection. 
• The right turn lane on Maricopa Road will also be lengthened to decrease congestion at the intersection.

Proposed Improvements to widen the SR 347 Corridor, between I-10 and the city of Maricopa

The project team is evaluating options to widen SR 347 by one lane in each direction within the median from the city of Maricopa to just north of Riggs Road.  The north section of the corridor, roughly between Maricopa Road and I-10, is being evaluated for widening both in the median and to the outside. With the additional lanes, the project would widen the existing bridges at Santa Rosa Wash, Santa Cruz Wash and Gila River. Intersection improvements will also be evaluated to accommodate a six lane highway.

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 SR 347 corridor, between I-10 and the city of Maricopa, as well as the Riggs Road traffic interchange, and answer questions.

The meetings were held in the city of Maricopa and the Gila River Indian Community to provide an opportunity for Community members to give input and ask questions about the project.

Documents

August 2024 Public Involvement Summary

Public Meeting Presentation (English)

Public Meeting Script (English)

Public Meeting Display Boards (English)

Public Meeting Presentation (Spanish)

Public Meeting Script (Spanish)

Public Meeting Display Boards (Spanish)

Project Videos

Design Schedule

The corridor widening project is in the preliminary design phase and not currently funded.  However, part of this project - the northern portion, from I-10 to Riggs Road - is included in the Regional Strategic Transportation Infrastructure Investment Plan and will be funded in part through Proposition 479, a dedicated half-cent sales tax for transportation approved by Maricopa County voters in 2024.

The Casa Blanca Road and Mammoth Way intersections project is in the preliminary design phase, and the team expects to move into the design phase in early 2025.  The estimated construction advertisement date is fall 2025.  

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ADOT welcomes your questions and comments. Please contact us in any of these ways:

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

Background

As the primary route from the city of Maricopa to the Phoenix area, State Route 347 (SR 347) has become a highly traveled corridor. In spring 2023, ADOT completed a safety study on SR 347 between I-10 and the northern city limits of Maricopa. The Road Safety Assessment (RSA) identified potential safety issues related to roadway traffic and evaluated possible ways to improve safety for drivers.

As a result of this assessment, the following were implemented as interim measures to improve traffic conditions until more long-term improvements can be made.

Project Map

Project Fact Sheet:

STRIPING IMPROVEMENTS

What: Restriping in the following areas to add or extend turn lanes: Queen Creek Road/Interstate 10 interchange; Riggs Road intersection; Casa Blanca Road intersection; Old Maricopa Road intersection; and the Mammoth Way intersection.

Why: Restriping allowed for more vehicles to queue in the turn lanes and potentially alleviate some of the congestion and back-ups at these intersections. 

When: These changes were implemented in October 2023.

Photos of Striping Work at SR 347 intersections:

Casa Blanca Road 

Mammoth Way (Cement Plant Access Road)

SR 347 (Queen Creek Road) and I-10 interchange
 

Old Maricopa Road

Riggs Road

SIGNAGE AND SIGNAL IMPROVEMENTS

What: New traffic signs added or replaced at intersections. An additional signal pole was installed at the eastbound I-10/Queen Creek off-ramp. Traffic signal timing was adjusted, and is being monitored and adjusted as needed going forward. Reflective signal head backplates were also installed.

Why: The new signs and existing sign changes provide additional guidance for lane usage and improve both driver awareness and line of sight at intersections. The new signal pole (I-10/Queen Creek Road) is an additional signal head that will improve the signal timing and better manage the traffic coming off the freeway. The signal timing adjustments help to alleviate unnecessary stopping of traffic at certain intersections. The reflective backplates on signals improve visibility in both daylight and darkness. 

When: The reflective backplates were installed in October 2023. The new signal pole at the eastbound I-10 ramp at Queen Creek Road was installed in late February 2024.

Emergency Signal Ahead Beacons:
The implementation of flashing ‘Signal Ahead’ warning beacons at certain intersections was completed. These devices are intended to reinforce awareness of existing traffic signals and can be placed in advance of signalized intersections where the intersection is hidden from the view of approaching travelers. 

MEDIAN CROSSOVERS

What: Four existing median crossovers were refreshed to allow access for emergency vehicle use. One additional median crossover was created for an additional access point in the corridor. These locations are: milepost (MP) 177.81, MP 179.22, MP 184.24 and MP 188.62; and the new crossover at MP 185.77.

Why: These improvements allow for better access for first responders throughout the corridor in the event of an accident. 

When: The work for the median crossovers was completed in January 2024. 

SPEED ADJUSTMENT

What: Removal of signs that previously reduced the speed limit from 65 mph to 55 mph approaching intersections. 

Why: This change is intended to increase compliance, reduce differential speeds, reduce the need for lane changing and potentially reduce rear-end crashes. 

When: New signs were installed in October 2023.

Read the full RSA report

Read the Speed Study Summary
 

SR 347 Widening, I-10 to city of Maricopa

Project Elements: Adds one lane in each direction on SR 347 from I-10 to the city of Maricopa and makes intersection improvements for traffic flow and safety.

Anticipated Schedule: This project is currently in the preliminary design phase and is not currently funded. However, the northern portion, from I-10 to Riggs Road, is included in the project list of the recently-approved half cent sales tax extension in Maricopa County.

Funding: This project is not fully funded for construction. However, the project is included in the Regional Strategic Transportation Infrastructure Investment Plan and the northern portion of the corridor (from I-10 to Riggs Road) will be funded in part through Proposition 479, a dedicated half-cent sales tax for transportation approved by Maricopa County voters in 2024.

More info: https://azdot.gov/projects/central-district-projects/sr-347-corridor-widening-i-10-city-maricopa

Casa Blanca Road and Mammoth Way Intersections

Project Elements: Modify the intersection layout to improve traffic flow and safety. It is being designed as part of the SR 347 widening project.

Anticipated Schedule: This project is in the preliminary design phase, and the team expects to move into the design phase in early 2025.  The estimated construction advertisement date is fall 2025.  

Funding: These intersections are funded for construction.

More info: https://azdot.gov/projects/central-district-projects/sr-347-corridor-widening-i-10-city-maricopa

SR 347 Pavement Preservation

Project Elements: Repave SR 347 between I-10 (MP 189.3) and Lakeview Drive (MP 175.7) at the northern limits of the city of Maricopa to create a smoother drive and extend the life of the roadway.

Anticipated Schedule: The project is currently in design. Construction is anticipated to begin in late 2026 and take approximately 12 months.

Funding: This project is funded for construction.

SR 347 Road Safety Assessment

As the primary route from the city of Maricopa to the Phoenix area, State Route 347 (SR 347) has become a highly traveled corridor. In spring 2023, ADOT completed a safety study on SR 347 between I-10 and the northern city limits of Maricopa. The Road Safety Assessment (RSA) identified potential safety issues related to roadway traffic and evaluated possible ways to improve safety for drivers. Interim improvements based on the assessment were completed in fall 2024.

More info: http://azdot.gov/SR347/RSA

John Wayne Parkway (SR 347) Improvements — SR 238/Smith-Enke Road to Maricopa City Limits

Project Elements: Added a third northbound through lane on SR 347 between SR 238/Smith Enke Road and the northern limits of the city of Maricopa, and made intersection improvements at SR 347/Lakeview Drive and repaired pavement within the project limits.

Schedule: This project was completed in May 2024.

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• Submit a question or comment to Kim Larson at [email protected].

Overview

The Arizona Department of Transportation completed a feasibility study in 2022 to assess the US 60 and Loop 303 (Estrella Freeway) interchange and other intersections along US 60 from 163rd Avenue in Surprise to RH Johnson Boulevard in Sun City West.  

The study evaluated several near-term and long-term projects to improve traffic flow and developed conceptual design plans and cost estimates for each improvement.

Near-term improvements refer to smaller projects that would mitigate some traffic congestion and could be implemented sooner than the long-term improvements.

Project Area Map

Additional US 60/Loop 303 and US 60/163rd Avenue Near-Term Improvements

In October 2024, the Maricopa Association of Governments approved new funding to implement additional US 60 (Grand Avenue)/Loop 303 and US 60/163rd Avenue near-term improvements. ADOT is currently designing these improvements with construction anticipated to begin in summer 2025 and take approximately six months to complete.

These improvements include:

US 60/Loop 303

• Add a second right turn lane on eastbound US 60 to southbound Loop 303.
• Add a third left turn lane from southbound Loop 303 to westbound US 60.
• Lengthen the two-lane portion of southbound Loop 303 on-ramp.

US 60/163rd Avenue

• Add a dedicated eastbound right turn lane into the drive between Deer Valley Road and 163rd Avenue and an acceleration lane along US eastbound 60.
• NOTE: Following the design review process, ADOT has determined not to proceed with the addition of a fourth through lane at the intersection of 163rd Avenue and US 60/Grand Avenue, due to concerns with traffic merging from four lanes into three lanes within a short distance, which would likely result in additional congestion leaving the intersection.

What to Expect

• Construction is anticipated to begin in summer 2025 and take approximately six months to complete.
• Work will require lane restrictions and ramp closures and is expected to occur primarily during overnight hours and weekends to minimize traffic impacts.
• ADOT will provide advance notice of restrictions and closures to email subscribers and on the project web page.

Public Input

In late December 2024 through early January 2025, ADOT invited the public to comment on the additional near-term improvements. A summary of those comments are below.

Near-Term Improvements (Substantially completed November 2024)

In April 2023 the Arizona State Legislature approved funding to initiate final design and construction of some short-term improvements. Some of these improvements were made in December 2023. Construction of the remaining improvements began summer 2024 and were substantially completed in late-November 2024.

These improvements include:

US 60/163rd Avenue

• Added a third left turn lane from southbound 163rd Avenue to US 60.
• Added a second right turn lane from northbound/westbound US 60 to 163rd Avenue (December 2023).
• Extended the existing east- and westbound US 60 third lane to 163rd Avenue (westbound December 2023; eastbound summer 2024).

Note: No pavement widening is needed for any of these improvements.

US 60/Loop 303

• Added a second lane to the northbound Loop 303 off-ramp at US 60.
• Widened the Loop 303/US 60 intersection and Loop 303 northbound off-ramp to provide three dedicated left turn lanes and one dedicated right turn lane from the northbound Loop 303 off-ramp to US 60.

Other improvements included restriping, new signs, traffic-signal timing adjustments and railroad coordination.

Long-Term Improvements

The feasibility study identified some possible long-term improvements that could be implemented as part of future reconstruction of the US 60/Loop 303 interchange. This project is included in the Regional Strategic Transportation Infrastructure Investment Plan and is funded in part through Proposition 479, a dedicated half-cent sales tax for transportation approved by Maricopa County voters in 2024.

Possible improvements include:

• Construct a diamond interchange at US 60 and Loop 303.
• Construct new southbound Loop 303 off-ramp and northbound Loop 303 on-ramp over the railroad tracks.
• Grade separate eastbound US 60 through lanes between 163rd Avenue and RH Johnson Boulevard to go over Loop 303.
• Build a US 60 overpass at 163rd Avenue. Traffic on 163rd Avenue could be serviced by a ground-level Single Point Urban Interchange (SPUI) interchange.

NOTE: These improvements are subject to change. Further study will be required to determine the final configuration of the long-term improvements.

Schedule

• In June 2022 the US60/SR303L Traffic Interchange (TI) Feasibility Report (See report under the Document tab) was completed.
• In December 2023 ADOT completed the following short-term improvements:
  • Added a second right turn lane from northbound/westbound US 60 to 163rd Avenue.
  • Extended the existing westbound US 60 third lane to 163rd Avenue.
  • Restriped westbound US 60 for third lane and two right-turn lanes to 163rd Avenue.
• Construction for the other short-term improvements began in late-July 2024 and was substantially completed in late-November 2024. 

Documents

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

This project is now complete

Overview

The Arizona Department of Transportation (ADOT) completed a pavement rehabilitation project in November 2024 along a 17-mile section of US 60 between Interstate 10 and Loop 202. ADOT completed the milling, diamond grinding and striping for that section of US 60 in August 2023.

Project Area

Project Elements

• Removed the existing top layer of asphalt pavement 

• Made needed repairs to the existing concrete pavement

• Diamond grinding was done to the existing concrete pavement to provide a smooth roadway surface

• Replaced lane striping and other pavement markings

Project Schedule

Construction began in January 2023. Work along US 60 was completed in August 2023. The overpass rehabilitation began in October 2023 and was completed November 2024.

Stay Informed

 

• Subscribe to receive project updates and traffic alerts by email. 
• Call the Project Information Line at 855.712.8530. 
• Submit a question or comment by email. 
• For real-time highway conditions statewide, visit ADOT’s Traveler Information Site at www.az511.gov, follow ADOT on Twitter (@ArizonaDOT) or call 511, except while driving.

Overview

The Arizona Department of Transportation has started a construction project to improve US 60X (also referred to as Old US 60, Apache Trail or Main Street) between Sossaman and Meridian roads. The project will enhance safety and business access, improving drainage conditions with installation of driveways, curb and gutter infrastructure and sidewalks, boosting mobility for all modes of transportation. Upon completion of this project, responsibility for this roadway will be turned over to the Maricopa County Department of Transportation.

Project Area

Project Elements

• Improve drainage conditions based on the recently completed North Mesa Area Drainage Master Study by the Flood Control District of Maricopa County
• Enhance safety
• Preserve business access
• Install sidewalks, curb, gutter, bike lanes and lighting

Median Crossover Improvements

Construction for this project began in February 2024 on the inside (median) portion of the road. Crews worked on curbing, paving, medians, drainage improvements and utility relocation. Many of the median crossovers along Main Street/Apache Trail were improved by lengthening or adding new turn bays while others were removed (see map below) to improve traffic flow and safety by reducing the number of turning movement conflicts. Please note that the 88th Street median crossover is currently closed, but will be reopened to traffic.

Project Schedule

Construction began February 2024 and is anticipated to be completed early 2026.

Stay Informed

 

Please subscribe to receive project updates and traffic alerts.

ADOT welcomes your questions and comments. Please contact us in any of these ways:

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

The Arizona Department of Transportation completed construction of the Interim Phase II section of State Route 24 (SR 24), also referred to as Gateway Freeway, in August 2022. This section includes approximately five miles of new freeway extending from Ellsworth Road in Maricopa County to Ironwood Drive in Pinal County. The completed project elements include:

• Two paved lanes in each direction separated by a median
• At-grade intersections at the following locations:
  • Williams Field Road
  • Signal Butte Road
  • Meridian Road
  • Ironwood Drive
• Bridges over Ellsworth and Mountain roads
• A drainage channel along the north side of the freeway
• Signage, traffic signals, lighting and pavement marking

State Route 24, Loop 202 to Ironwood Drive Improvements

In July 2024, ADOT began the design phase for improvements to SR 24 between Loop 202 and Ironwood Drive. This project is included in the Regional Strategic Transportation Infrastructure Investment Plan and is funded in part through Proposition 479, a dedicated half-cent sales tax for transportation approved by Maricopa County voters in 2024. The improvements include:

• Four general purpose lanes in each direction between Loop 202 and Williams Field Road (road to be widened within the median)
• Three general purpose lanes in each direction between Williams Field Road and Ironwood Drive (road to be widened within the median)
• Bridges over Williams Field, Crismon, Signal Butte and Meridian roads
• An additional lane will be added to westbound Loop 202 from SR 24 to Recker Road
• An additional lane will be added to eastbound Loop 202 from Power Road to SR 24 
• An additional lane will be added to north- eastbound Loop 202 from SR 24 to Guadalupe Road
• New connector ramps will be built between Ellsworth Road and Loop 202 and westbound SR 24 to northbound Loop 202

Timeline

Design began in July 2024 and is expected to take approximately one year to complete. A public meeting to present the final design plans is expected in late summer 2025.

State Route 24 east of Ironwood Drive

The potential future SR 24 extension to US 60 falls within Pinal County. The county will be the lead agency for a study 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://cleargov.com/arizona/pinal/county/projects.

Interim Phase II Documents

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  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 

Overview

The Arizona Department of Transportation, in cooperation with the city of Goodyear, the Federal Highway Administration, the Maricopa Association of Governments and the Flood Control District of Maricopa County has initiated a project to construct a new segment of Loop 303 between Maricopa County Road 85 (MC 85) and Van Buren Street in Goodyear.

This project is related to an ADOT study completed in 2018. Learn more here.

Project Map

Project Elements

Design work is underway on this new segment of Loop 303 that will extend from MC 85 north to Van Buren Street. The project elements include:

• Constructing a new section of Loop 303 elevated over the cross streets and the Union Pacific Railroad, from MC 85 to Van Buren Street

• Constructing two general purpose lanes in each direction from MC 85 to Lower Buckeye Road

• Constructing three general purpose lanes in each direction from Lower Buckeye Road to Van Buren Street 

• Completing the south half of the Van Buren Street diamond traffic interchange

• Constructing a full diamond traffic interchange at Yuma Road

• Constructing a half diamond traffic interchange at Elwood Street

• Constructing a signalized intersection at MC 85

• Constructing one-way frontage roads in each direction to maintain local access, including connections to the major arterial streets from Elwood to Van Buren streets

• Replacing neighborhood retention basins along the Canyon Trails Channel and connecting the Canyon Trails channel to the Loop 303 Outfall Channel

• Constructing a First Flush Basin at the southeast corner of Citrus and Broadway roads

• Constructing linear drainage basins from Elwood Street to MC85

• Adding new soundwalls where warranted based on the project’s noise analysis

• Installing new lighting, signage and other features

Project Schedule

• The project is currently in the design phase.
• Construction is anticipated to begin in 2026.
• Construction is anticipated to last approximately three years.

Project Fact Sheet

(English and Spanish)

Public Meetings

Loop 303, MC 85 to Van Buren Street Project

In-Person Public Meeting

A public meeting was held Wednesday evening, May 10, 2023, at Desert Edge High School in Goodyear.
The project team gave a presentation on the project, followed by a Q&A session. The presentation slides with notes can be found under the Public Meeting Content section, along with other project documents and videos.
 

Virtual Public Meeting

A virtual public meeting was held Thursday evening, May 11, 2023. It featured a presentation on the project followed by a Q&A session. A video recording of the presentation (English and Spanish) can be found under the Public Meeting Content section, along with other project documents and videos.

Public Meeting Content

Project Documents

Stay Informed

Please 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

Overview

The Arizona Department of Transportation, in coordination with the Maricopa Association of Governments and the cities of Phoenix and Peoria, is planning for improvements to Loop 303 between Lake Pleasant Parkway and Interstate 17 that will include an additional general purpose lane in each direction, bridges to accommodate a future interchange at 67th Avenue, and a new Loop 303/I-17 system-to-system interchange. The project seeks to address growing traffic demands on Loop 303.

Project Elements

• Add a third general-purpose lane to Loop 303 in each direction between Lake Pleasant Parkway and I-17

   

• Construct new bridges to accommodate a future traffic interchange at 67th Ave
• Build direct connecting ramps at the I-17/Loop 303 system interchange
• Install new lighting
• Construct drainage improvements
• Install new overhead signs

Project Simulation

Public Meeting

The Arizona Department of Transportation held a virtual public meeting on April 17 to provide details the design of Loop 303 improvements to address growing traffic demands.

Meeting Recording and Presentation

Virtual Public Meeting Presentation

Virtual Public Meeting Presentation Script

Public Meeting Summary

Documents

Draft Air Quality Report (2025)

Draft Noise Report (2024)

Loop 303, Lake Pleasant Parkway to I-17 Final Design Concept Report

Appendices

• Appendix A - Summary of AASHTO Controlling Design Criteria
• Appendix F - Final Drainage Report
• Appendix B - Estimated Engineering Construction Cost
• Appendix G - Roadway Distress Assessment
• Appendix C - Design Roll Plots
• Appendix H - Initial Design Concept Report Summary of Comments
• Appendix D - Construction Sequencing
• Appendix I - October 20, 2021 Public Meeting Summary
• Appendix E - Final Project Assessment

51st and 43rd avenues Traffic Interchanges

Project Overview

In September 2022, the Arizona Department of Transportation, in coordination with the Maricopa Association of Governments, the Federal Highway Administration and the city of Phoenix, began construction on new Loop 303 traffic interchanges at 51st and 43rd avenues. The new interchanges will address expected traffic growth prompted by current and planned development in the area. The interchanges were completed and opened in September 2023.

In addition to the new traffic interchanges, the project also included:

• New bridges on Loop 303 over 51st and 43rd avenues
• The extension of the southbound frontage road from 43rd to 51st avenues
• Drainage improvements at 51st and 43rd avenues
• New signals at ramp and crossroad intersections
• New signs, pavement markings and lighting
• The 51st Avenue interchange was shifted slightly to the west to accommodate the realignment of 51st Avenue.

Note: While the city of Phoenix’s long-range transportation plan identifies the planned extension of 43rd, 51st and 67th Avenue/Pyramid Peak Parkway south of Loop 303 based on future development, the city has no immediate plans to extend these roadways

Previous Public Outreach

On October 20, 2021, ADOT held a virtual public meeting to provide information about the proposed near-term and long-term improvement plans to Loop 303 between Lake Pleasant Parkway and Interstate 17.

• Meeting Summary
• Meeting Slides - English Script
• Meeting Slides - Spanish Script

Stay Informed

Please 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