ADOT updates I-10/Broadway Curve project, solicits public survey on work

A worker installs a drilling bit on a rig for construction of the foundation for the widened eastbound Interstate-10 bridge over the Salt River. [Arizona Department of Transportation photos]

Soon, new bridges at Broadway Road and 48th Street will open.

Work on collector-distributor roads from U.S. 60/Superstition Freeway to State Route 143/Hohokam Expressway are taking shape, as are new bridges for the rebuilt Interstate 10/SR 143 interchange near Phoenix Sky Harbor International Airport.

Interstate 10/Broadway Curve Improvement Project

Arizona Department of Transportation says 2023 will be a busy year on the I-10/Broadway Curve Improvement Project, which is scheduled for completion in the second half of 2024.

In December, workers began widening I-10 bridges over the Salt River, constructing the foundation for the eastbound bridge. This month, they began constructing the foundation for the westbound bridge. Drivers can expect to use the new lanes on the widened bridges in late 2023 or early 2024.

Multiuse bridges for pedestrians, bicyclists and equestrians over I-10 are underway. These bridges, at Alameda Drive and the Western Canal near U.S. 60, are key elements of the project, according to ADOT, because they will enhance pedestrian and bicycle connectivity by reducing pressure on local roads. Foundations for both bridges are in place. Crews are building the substructures.

Bridge access ramps feature maze patterns and lizards. Steel trusses for both bridges will be placed over I-10 later this year. They are expected to open in 2024.

The I-10/Broadway Curve project runs along I-10 from Loop 202/Santan/South Mountain Freeway north and west to I-17/Maricopa Freeway near the airport. The massive project is the state’s largest urban-freeway reconstruction project to date.

A crane moves into position to begin installing drilled-shaft foundations for the bridge that will widen westbound I-10 over the Salt River.

As the designated Metropolitan Planning Organization for the Maricopa County region, the Maricopa Association of Governments plans and funds the Regional Transportation System in Maricopa County and sections of Pinal County.

This project is identified in the MAG Regional Transportation Plan, which is funded by the half-cent sales tax Maricopa County voters approved in 2004 through Proposition 400. MAG identified the need for this project to reduce travel times on I-10 during peak hours, improve airport access, support ridesharing and transit, and prepare the region for future growth. MAG programmed funding for delivery of this project in 2024.


Upcoming full closures

A new bridge for eastbound collector-distributor lanes, designed to relieve through-traffic congestion on I-10. is underway over the Baseline Road off-ramp.

The project team has the following Interstate 10 full closures scheduled:

  • Southbound State Route 143 from Loop 202/Red Mountain Freeway to I-10, 10 p.m. Friday, Jan. 20, to 4 a.m. Monday, Jan. 23, for a traffic shift.
  • Westbound I-10 ramp to eastbound U.S. 60 and westbound I-10 on-ramp at Baseline Road, 10 p.m. Friday, Jan. 20, to 4 a.m. Monday, Jan. 23, for bridge work.
  • Westbound I-10 from Loop 202/Santan/South Mountain Freeway to U.S. 60, 10 p.m. Friday, Jan. 27, to 10 p.m. Saturday, Jan. 28, for bridge work.
  • Eastbound I-10 from U.S. 60 to Loop 202/Santan/South Mountain Freeway, 10 p.m. Saturday, Jan. 28, to 4 a.m. Monday, Jan. 30, for bridge work.
  • Westbound I-10 ramp to eastbound U.S 60., 10 p.m. Friday, Jan. 27, to 4 a.m. Monday, Jan. 30, for bridge work.
  • No full closures planned Feb. 1-13; however, some restrictions that do not significantly impact travel could be scheduled.

Information:, or bilingual information line at 602-501-5505, or project headquarters, 3157 E. Elwood St., Suite 100, Phoenix 85034 (Community office hours 8 a.m. to 5 p.m., Monday through Friday, except holidays).


ADOT survey deadline Jan. 27

The rebar cage for the foundation of the widened I-10 Salt River Bridge is approximately 110 feet tall and nine feet across.

ADOT is asking the public to take a survey of how it handled work on the Interstate-10/Broadway Curve Improvement Project from Oct. 1 to Dec. 31.

ADOT says survey responses will help it determine how it can improve construction activities and communication efforts moving forward.

Access the survey here. Deadline to submit a survey is Friday, Jan. 27. The survey is anonymous.

Also, project team members plan an informational public presentation 2-5 p.m. Monday, Feb. 6, at Phoenix Public Library-South Mountain Branch, 7050 S. 24th St. in Phoenix.

The Western Canal multiuse bridge access ramps feature maze patterns and lizards.

When possible, ADOT says freeway constructors attempt to minimize construction impacts as they move to complete the project as safely and quickly as possible.