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Loop 303, Lake Pleasant Parkway to I-17 Improvements
Loop 303, Lake Pleasant Parkway to I-17 Improvements
Contents
Overview
The Arizona Department of Transportation, in coordination with the Maricopa Association of Governments and the cities of Phoenix and Peoria, will be improving Loop 303 between Lake Pleasant Parkway and Interstate 17 by adding one general purpose lane in each direction, bridges to accommodate a future interchange at 67th Avenue, and a new Loop 303/I-17 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
- Widen northbound I-17 exit ramp at Sonoran Desert Drive
- Install new lighting
- Construct drainage improvements
- Install new overhead signs
Project Area Map
Click map to enlarge.
Project Simulation
Project Schedule
The project will be delivered in three phases.
- Phase 1: Sept. 2025 to early 2026 - Widen northbound I-17 off-ramp at Sonoran Desert Drive
- Phase 2: Later in 2026 to mid-2028 - Construct Loop 303/I-17 system interchange and widen Loop 303 between 51st Avenue and I-17
- Phase 3: Late Spring 2026 to late 2027 - Widen Loop 303 between Lake Pleasant Parkway and 51st Avenue, construct bridges for future 67th Ave interchange
Northbound I-17 Off-Ramp at Sonoran Desert Drive Widening Project
Overview
The Arizona Department of Transportation, in partnership with the Maricopa Association of Governments, is widening the northbound Interstate 17 off-ramp at Sonoran Desert Drive to increase capacity for the northbound I-17 off-ramp and relieve congestion on northbound I-17.
Project Elements
- Adding an additional lane to the northbound I-17 off-ramp at Sonoran Desert Drive
- Constructing a storm drain
- Installing new overhead signs
- Restriping the outside lanes of northbound I-17 to accommodate the new ramp configuration
Click map to enlarge.
Schedule
Construction is anticipated to start in Sept. 2025 and take approximately four months to complete. Lane restrictions will be needed throughout construction but are expected to be minimal. No closures of northbound I-17 are anticipated.
Previous Public Outreach
ADOT held a virtual public meeting on April 17, 2024 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
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.
Study Documents
Draft Air Quality Report (2025)
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.
51st and 43rd Project Area Map
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
Stay Informed
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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