PHOENIX – The largest freeway reconstruction project in Arizona history will be completed in 2025, transportation officials said in announcing work planned for the new year.

The I-10 Broadway Curve improvement project between the I-17 “Split” and Loop 202 began in 2021 and is expected to be completed this spring, according to a release from the Arizona Department of Transportation.

In addition to new lanes that have been added along eleven miles of I-10, crews are finishing elevated ramps, providing direct connections at the I-10/State Route 143 interchange, official said. Workers also will complete two pedestrian/bicyclist bridges and widen the Guadalupe Road bridge over I-10.

Topping ADOT’s list of new construction projects is an extension of Loop 303 from Van Buren Street south to Maricopa County Highway 85 in the Goodyear area.

The project, currently in final design, will provide three freeway lanes in each direction between Van Buren Street and Lower Buckeye Road and two lanes in each direction from Lower Buckeye Road to MC 85, according to a release from the Arizona Department of Transportation.

New bridges will carry the freeway over several cross streets and the Union Pacific Railroad. The new stretch of Loop 303 will be built where Cotton Lane currently carries area traffic.

Work is scheduled to start by fall 2025 and last approximately three years, transportation officials said.

 Other projects:   

• The Loop 101 improvement project between Shea Boulevard and Princess Drive/Pima Road in Scottsdale is scheduled for completion by early 2026. Work started in January 2024. The project includes the addition of a lane in each direction within a 4.5-mile work zone. Crews also are converting the Loop 101 interchange at Frank Lloyd Wright Boulevard into a diamond configuration to improve traffic flow.         
• Completion of the I-17 improvement project between Anthem Way and Sunset Point north of Phoenix in late 2025. Work on the 23-mile project started in fall 2022. Crews are nearing completion of third lanes in each direction between Anthem Way and Black Canyon City. Work also continues on the eight-mile flex lanes system north of Black Canyon City.

• An I-10/Loop 101 Interchange improvement project in the West Valley is expected to start this summer. Work will include construction of new HOV ramps providing I-10/Loop 101 connections to and from the east (downtown Phoenix). Crews also will modify the existing southbound Loop 101 to eastbound I-10 ramp to add a direct “exit ramp” to 91st Avenue. A new combined southbound Loop 101 exit to both Thomas and McDowell roads will be built to help manage overall freeway traffic flow. Construction is expected to last two years.
• Work will advance on the Loop 101 widening project between I-17 and 75th Avenue in the northwest Valley. The 30-month project started in September 2024. In addition to adding new Loop 101 lanes in each direction, the project includes interchange and cross-street improvements at 75th Avenue.
• The Loop 202 widening project between Loop 101 and Val Vista Drive in the southeast Valley, which started in August 2024, will add new lanes in each direction. Bridge and interchange improvements also are underway. The project is scheduled for completion by early 2027.                      
• Construction of new I-10 Gila River bridges southeast of Riggs Road will advance during 2025. Crews started work in summer 2024 to replace the I-10 bridges crossing the Gila River. Completion is scheduled for summer 2026.
• Completion of the I-17 resurfacing project between Happy Valley Road and State Route 74 in north Phoenix by March 2025. The project, which started in May, has included diamond grinding of the freeway’s concrete pavement surface. ADOT also is finalizing plans for an I-17 resurfacing project between SR 74 and Anthem Way, scheduled to start by summer 2025.