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UPDATE: Plan for lane restrictions on north- and southbound SR 187 on the Gila River Indian Community beginning Oct. 20

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The Arizona Department of Transportation advises drivers to plan for the following lane restrictions on State Route 187, between the Interstate 10 and the SR 387 junction (milepost 186) and SR 87 (milepost 192) beginning Monday, Oct. 20, as a new pavement rehabilitation project gets underway on the Gila River Indian Community

Motorists can expect the following restrictions:

  • Lane restrictions on north- and southbound SR 187 between mileposts 186 and 192 daily from 6 a.m. to 6 p.m. Monday through Friday
  • Rolling lane restrictions as crews work in multiple sections each day
  • A flagging operation in the project area
  • The speed limit will be reduced to 25 mph in the work zone
  • Law enforcement will be on site at the intersection of SR 187 and SR 87 as work is completed in that area
  • Drivers may consider using SR 387 to avoid construction delays

Drivers should allow extra travel time, use caution, be prepared to slow down and merge safely when approaching and traveling through all work zones.

Schedules are subject to change due to weather and other unforeseen circumstances.

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State Route 187: SR 387 to SR 87 Improvement Project

State Route 187: SR 387 to SR 87 Improvement Project

Contents

  1. Overview
  2. Project Fact Sheet
  3. Project elements
  4. Project Area Map
  5. Project Schedule
  6. What to Expect
  7. Project Photos
  8. Stay Informed

Overview

The Arizona Department of Transportation began a pavement preservation project on State Route 187 on the Gila River Indian Community in October 2025. These improvements include pavement preservation, shoulder widening and adding new turn lanes.  These improvements will reduce congestion and improve mobility. 

Project Fact Sheet

Spanish PDF

Project elements

  • Adding a new right-turn lane on SR 187 approaching SR 87 
  • Adding a new right-turn lane on SR 87 approaching SR 187
  • Adding a new left-turn lane on SR 187 approaching Casa Grande Road
  • Widening SR 187 to accommodate 8-ft shoulders on both sides
  • Removing and replacing the asphalt
  • Constructing drainage improvements
  • Replacing bridge railing
  • Relocating traffic signal equipment at the SR 187/SR 87 intersection

Project Area Map

Map State Route 187: SR 387 to SR 87 Improvement Project

 

Project Schedule

Construction began in October 2025 and is projected to be completed in spring 2026. ADOT will provide advance notice of restrictions and closures once construction starts. Schedules are subject to change due to weather and other unforeseen circumstances.

What to Expect

  • Traffic control devices will guide motorists through the construction area. 
  • Construction work is tentatively scheduled from 6 a.m. to 6 p.m. Monday through Friday. 
  • Expect temporary delays as traffic is redirected through a single travel lane. 
  • ADOT will provide advance notice of restrictions and closures to email subscribers. 

Project Photos

State Route 187: SR 387 to SR 87 Improvement Project

Stay Informed

...
  • By email: Subscribe to receive traffic alerts and project updates directly to your email.
  • By phone: Call the ADOT Project Information Line at 855.712.8530
  • Online: Submit a question or comment to Dulce Maria Rojo at [email protected].

For real-time highway conditions statewide, visit ADOT’s Traveler Information Site at www.az511.gov, follow ADOT on Twitter @ArizonaDOT or call 511, except while driving.

Contents

  1. Overview
  2. Project Fact Sheet
  3. Project elements
  4. Project Area Map
  5. Project Schedule
  6. What to Expect
  7. Project Photos
  8. Stay Informed