State Route 79 Passing Lane Project: Milepost 140 to 148

Overview

The Arizona Department of Transportation is constructing passing lanes on north- and southbound State Route 79, north of Florence (milepost 140 to 148) in Pinal County.

A northbound passing lane is being added between mileposts 140.45-140.95 and between mileposts 145.80-146.20. A southbound passing lane is being added between mileposts 143.65-144 and between mileposts 147.38-147.75.

Drainage and guardrail improvements, new pavement markings and other related work will also be completed.

Project Elements

• Construct passing lanes along both sides of the highway
• Add paved shoulders along new passing lanes
• Pave, spot repair, or mill and replace pavement, as needed
• Install pavement marking and striping
• Remove and replace guardrail and end treatments

What to Expect

Drivers on SR 79 may experience shoulder closures, lane closures, flagging operations, and/or traffic restrictions at different times throughout the project. ADOT will provide advance notice of restrictions and closures to email subscribers and on the project traffic alert web page.

Project Schedule

Construction on this project began on July 6, 2026. Crews will work from 6 a.m. to 6 p.m. Monday through Thursday, and from 6 a.m. to noon on Fridays. The project is expected to be completed by summer 2027.

SR 79 will be narrowed to one lane between milepost 147 and 148 from 5 a.m. to 6 p.m., on Thursday, July 9.

• Flagging operations will direct north- and southbound motorists through a single lane, one direction at a time. Drivers should be prepared to come to a complete stop for up to ten minutes.
• The speed limit will be reduced to 25 mph while the flagging operation is in place.

Schedules are subject to change because of weather and other unforeseen situations.

Stay Informed

Subscribe for updates

• Phone: ADOT Bilingual Project Information Line at 855.712.8530
• Email: Submit a question or comment to Kara Spinney 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.