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

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Westbound Loop 101 will be closed between 51st and 75th avenues from 10 p.m. Friday, Aug. 28, to 5 a.m. Monday, Aug. 31.
- The north- and southbound Interstate 17 ramps to westbound Loop 101 also will be closed, as well as the westbound Loop 101 on-ramps at 27th and 35th avenues.
- DETOUR: Drivers may consider taking westbound Union Hills to navigate to their destination or reconnect with Loop 101.
The eastbound Loop 101 ramps to north- and southbound I-17 will be closed from 10 p.m. Sunday, Aug. 30, to 5 a.m. Monday, Aug. 31.
- DETOUR: Drivers may consider using 35th Avenue to Union Hills Drive or Deer Valley Road to access I-17.
The eastbound Loop 101 on-ramp at 51st Avenue will be closed from 9 p.m. Tuesday, Sept. 1, to 5 a.m. Wednesday, Sept. 2.
- Eastbound Loop 101 also will be narrowed to one lane between 51st and 43rd avenues during this time.
The westbound Loop 101 on-ramp at 67th Avenue and the westbound off-ramp at 75th Avenue will be closed nightly from 9 p.m. to 5 a.m. beginning Tuesday, Sept. 1, ending Friday morning, Sept. 4.
- Westbound Loop 101 also will be narrowed to two lanes in the area.
North- and southbound 35th Avenue will be closed at Loop 101 from 9 p.m. Thursday, Sept. 3, to 5 a.m. Friday, Sept. 4.
- DETOUR: Drivers may consider using the east- and westbound frontage roads to navigate around the closure.

Labor Day weekend

No restrictions or closures are planned for the Labor Day holiday weekend.

UPDATE: Ongoing lane restrictions

UPDATED: The east- and westbound Loop 101 high-occupancy vehicle (HOV) lanes between 43rd and 51st avenues will open Wednesday, Sept. 2.
The eastbound Loop 101 frontage road is reduced to one lane between 37th and 35th avenues through late September.

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

Overview
Project Elements
What to Expect
Schedule
Project Photos
Stay Up to Date

Overview

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

Loop 101, 75th to I-17 construction progress July 2026

Find more photo albums on Flickr:

December 2024
June 2025
February 2026
April 2026 (New WB lane open 27th-51st Ave)

Stay Up to Date

Please subscribe to receive project updates by email.

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