Arizona Department of Transportation
I-17 Improvement Project

Major roadwork continues along Interstate 17 between Anthem Way and Sunset Point.

I-17 Improvement Project

We're improving I-17 between Anthem Way and Sunset Point. The work includes widening 15 miles of roadway, replacing two bridges and widening 10 others, and constructing approximately eight miles of flex lanes.

Construction began in 2022 and ADOT anticipates it will take approximately three years to complete. This timeline makes it possible for the project team to minimize impacts on the traveling public while work is underway.

Camera Icon View monthly construction progress photos on the map.

Minimizing Your Travel Impacts

Because much of the travel and congestion on I-17 occurs on weekends, lane closures will primarily be limited to weeknights from 7 p.m. to 6 a.m. However, travelers should remain cautious in the construction zone, which will be active seven days a week. No weekend lane closures will be scheduled for construction, which allows you to use I-17 during peak travel days and times with limited construction impacts or restrictions. (A closure might occur on a weekend because of an emergency or unplanned incident.)

View Current Traffic Alerts

What are Flex Lanes?

The flex lane system is a proven technology to alleviate traffic congestion during peak travel times, or if an unplanned incident creates delays. The flex lanes will operate as an additional two-lane roadway that carries one direction of traffic at a time and can alternate between north- and southbound depending on the greatest need due to capacity.

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Recent Highlights

Bumble Bee Bridge Takedown Timelapse

The old bridge at Bumble Bee Road over southbound I-17 was removed by crews to make way for a newer and wider bridge that was built to prepare for the flex lanes.

Bridge Takedown

Bumble Bee Bridge Removal

Crews used heavy equipment to take down the old Bumble Bee Bridge over southbound I-17.

Watch the work

Blasting Complete for the I-17 Improvement Project

Approximately 177,000 cubic yards of rock and material was removed during this crucial earthwork operation for constructing new lanes.

Watch mountains move

Project Benefits

The section of I-17 between Anthem Way and Sunset Point is one of the most heavily utilized roadways in Arizona, with more than 1 million travelers each year. This project will help improve I-17 for motorists, businesses, visitors and others. For example:

Project History

The I-17 Improvement Project began in 2018 with technical analysis, environmental analysis and public involvement. The project is included in the 2021-2025 Five-Year Construction Program and is being delivered as a design-build-operate-maintain (DBOM), Public Private Partnership (P3).

Project Timeline
  • 2022 - Pre-construction activities and start of construction on September 26
  • Final design and construction ongoing through 2025
  • Blasting completed in May 2024
  • Project completed in 2025, and contractor maintenance period begins

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