Loop 101 (Agua Fria Freeway), 75th Avenue to I-17 Improvements

The project is widening Loop 101 between 75th Avenue and I-17 by one general-purpose lane in each direction to improve traffic flow on Loop 101 and the cross streets. Other improvements include widening bridges, modifying interchange ramps and frontage roads in some locations, adding a third southbound left turn lane onto Loop 101 at 75th Avenue, improving the system interchange ramp between westbound Loop 101 and northbound I-17 and resurfacing the roadway.

This project is included in the Regional Transportation Plan for Maricopa County and is funded through Prop 400, a countywide dedicated half-cent sales tax for transportation improvements approved by voters in 2004.

project map

Fact Sheets

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Project Elements

Adding one general purpose lane to the outside of Loop 101 in each direction between 75th Avenue and I-17.
Widening bridges at 51st, 35th and 31st avenues and constructing new retaining walls.
Modifying interchange ramps and frontage roads in some locations.
Interchange improvements at 75th Avenue to add a third southbound left turn lane onto eastbound Loop 101.
Adding a lane to the westbound Loop 101 ramp to northbound I-17.
Adding a new lane to northbound I-17 between Loop 101 and Pinnacle Peak road to accommodate the additional traffic lane from westbound Loop 101.
Adding or modifying noise walls in some locations where warranted.
Removing the worn asphalt and resurfacing the concrete pavement by diamond grinding.
Upgrading freeway and ramp lighting.
Modifying the existing freeway drainage system.
Replacing impacted landscaping.

What to Expect

Construction is expected to take approximately two-and-a-half years to complete.
Work will require lane restrictions and full closures on Loop 101, the interchange ramps and cross streets, and will occur primarily during overnight hours and weekends to minimize traffic impacts.
Long-term on- and off-ramp closures will be required (up to 60 days).
ADOT will provide advance notice of restrictions and closures to email subscribers and on the project web page.
Access to businesses and residences will be maintained.

Schedule

The project began in late September 2024 and is expected to take approximately two-and-a-half years to complete.

Project Photos

Find more photo albums on Flickr:

December 2024
June 2025
February 2026

Stay Up to Date

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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

Loop 101 (Agua Fria) current and upcoming closures and restrictions