Current and upcoming Loop 101/SR 51 closures and restrictions

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Loop 101 (Pima Freeway) ramps to southbound State Route 51 closed overnight Sept. 11

Additional overnight closures and restrictions also planned

The Arizona Department of Transportation advises drivers to plan for the following closures and restrictions from 9 p.m. Thursday, Sept. 11, to 5 a.m. Friday, Sept. 12, as preparation work continues for the eastbound Loop 101 to southbound State Route 51 ramp widening project:

The east- and westbound Loop 101 ramps to southbound SR 51 will be closed.
- Eastbound Detour: Drivers may consider using southbound Cave Creek Road to eastbound Union Hills Drive to access SR 51.
- Westbound Detour: The high-occupancy vehicle (HOV) ramp from westbound Loop 101 to southbound SR 51 will remain open. Drivers can use this HOV ramp to SR 51 or may consider using southbound Tatum Boulevard to westbound Union Hills Drive to access SR 51.
The southbound SR 51 on-ramp at Black Mountain Boulevard will be closed.
- Detour: Drivers may consider taking eastbound Deer Valley Road to southbound Tatum Boulevard and traveling west on Union Hills Drive to access SR 51.

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Loop 101/State Route 51 Ramp Widening

Contents

Overview
Project Area Map
What to Expect
Project Timeline
Stay Informed

Overview

The Arizona Department of Transportation, in partnership with the city of Phoenix and Maricopa Association of Governments, is widening the eastbound Loop 101 to southbound State Route 51 ramp from one to two lanes. These improvements will include:

Adding new pavement along the existing ramp to accommodate a two-lane configuration.
Constructing a new concrete barrier on the northeast curve of the ramp after paving.
Restriping eastbound Loop 101 at the system interchange to provide a dual-lane exit to southbound SR 51.
Installing new overhead signs on eastbound Loop 101.
Installing new speed limit and warning signs.
Restoring landscaping, including replanting salvaged trees.

Project Area Map

Loop 101/State Route 51 Ramp Widening Project map

What to Expect

Overnight or weekend closures of the ramp.
Overnight restrictions and closures of eastbound Loop 101 for overhead sign installation and striping.

Project Timeline

Construction is set to start early September 2025 and is expected to take approximately 11 months.

Stay Informed

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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