TUCSON – The Arizona Department of Transportation is nearing completion on a project to widen and reconstruct Interstate 10 from Ina to Ruthrauff roads in the northwest Tucson area, with all parts of the project expected to open to traffic by mid-May.

Crews are now tending to the final details of the $171 million project that will improve traffic flow and safety.

The work includes completing lane stripes for a fourth lane on both directions of I-10, where overnight lane restrictions will soon end. And work is continuing on the new Sunset Road interchange along with an extension of Sunset Road between I-10 and River Road. Crews are finalizing work on traffic signals, landscaping and painting the Sunset Road overpass.

The Sunset Road extension, a $35 million element of the project funded by Pima County, creates a new connection to and from I-10 with new bridges over the Union Pacific railroad tracks and the Rillito River.

When complete, the overall I-10 project will widen the interstate from three to four lanes in each direction between Ina and Ruthrauff roads.

Other project highlights include:

• Reconstructing the Orange Grove Road interchange, which opened in February 2025 and features higher I-10 bridges above Orange Grove Road to allow for greater clearance
• New interchange designs at Orange Grove and Sunset roads, which feature additional lanes on entrance and exit ramps to promote safety and reduce delays
• Replacing all nine bridges in the project area, including those over Canada del Oro Wash and Rillito River
• Constructing an access path to the Chuck Huckelberry Loop from Sunset Road
• Related work on lighting, landscaping and drainage

The I-10 project is part of the Regional Transportation Authority’s roadway improvement plan, managed by the Pima Association of Governments. The project began in early 2023.

For more information, please visit azdot.gov/i10ina2ruthrauff.