Current and upcoming Loop 101/SR 51 closures and restrictions

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UPDATE: Eastbound Loop 101 ramp to southbound State Route 51 closed Feb. 28-March 1

This advisory adds the closure of the eastbound Loop 101 on-ramp at Cave Creek Road

The Arizona Department of Transportation advises drivers to plan for the following restrictions and closures from 5 a.m. Saturday, Feb. 28, to 5 a.m. Sunday, March 1, for final striping:

The eastbound Loop 101 ramp to southbound SR 51 will be closed.
- Detour: Drivers may consider using southbound Cave Creek Road to eastbound Union Hills Drive to access SR 51.
NEW: The eastbound Loop 101 on-ramp at Cave Creek Road will be closed.
- Detour: Drivers may consider using eastbound Deer Valley Road to southbound Tatum Boulevard to access eastbound Loop 101.
Eastbound Loop 101 will be narrowed to three lanes between Cave Creek Road and SR 51.
The southbound SR 51 on-ramp at Black Mountain Boulevard will be closed.
- Detour: Drivers may consider using eastbound Deer Valley Road to southbound Tatum Boulevard and travel west on Union Hills Drive to access SR 51.
The westbound Loop 101 ramp to southbound SR 51 will be closed.
- Note: The westbound Loop 101 high occupancy vehicle ramp will be open for drivers to access southbound 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