Broadway Curve

PHOENIX — The Arizona Department of Transportation has signed an agreement with the developer team that will design and build the Interstate 10 Broadway Curve Improvement Project.

ADOT finalized the $615.7 million contract with the developer on Tuesday. Construction is scheduled to begin in mid to late 2021 and last up to four years.

The developer — a joint venture of Pulice Construction, FNF Construction and Flatiron Constructors, with T.Y. Lin International as the lead designer — was selected over two other finalists after an extensive review by ADOT, the cities of Phoenix and Tempe and the Maricopa Association of Governments. The finalists were encouraged to use innovation and develop alternative concepts to reduce project time and impacts to the traveling public and community while construction is underway.

The project area is an 11-mile section of I-10 between I-17 and the Loop 202 Santan/South Mountain freeways, including the busy Broadway Curve area between Baseline Road and 40th Street. About 300,000 vehicles already travel through the Broadway Curve daily, and that number is expected to increase as the Phoenix metropolitan area continues to grow.

The improvements will enhance safety, reduce travel time, ease access to Phoenix Sky Harbor International Airport and support the local, regional and state economies.

“Delivering this project after years of study and careful consideration of public input demonstrates ADOT’s commitment to providing the safest, most reliable transportation system in the nation,” said ADOT Director John Halikowski. “Interstate 10 is a Key Commerce Corridor that supports Arizona’s efforts to succeed in the global trade market and a vital transportation route for millions of people who live in, work in and visit our state every year. Improving safety and reducing congestion will truly benefit everyone who relies on our highway system, as well as thousands of businesses along the I-10 corridor. We are proud to deliver a project that will improve quality of life for so many people throughout the region.”

Planned improvements include:

  • Widening I-10 to six general purpose lanes and two HOV lanes between 24th Street and the U.S. 60 Superstition Freeway.
  • Building a collector-distributor road system between Baseline Road and 40th Street to separate local traffic from through traffic on I-10.
  • Adding a fourth general purpose lane on I-10 from U.S. 60 to Ray Road and keeping the HOV lane.
  • Modifying I-10 connections at SR 143, Broadway Road and U.S. 60 to improve traffic flow and safety.
  • Replacing ramps at I-10 interchanges at SR 143 and U.S. 60 with new ramps, including new bridges.
  • Adding two bridges for pedestrians and bicyclists over I-10 between Baseline and Broadway roads and improving the Sun Circle Trail crossing at Guadalupe Road.

The I-10 Broadway Curve improvement project is funded in part by Proposition 400, a dedicated sales tax approved by Maricopa County voters in 2004.

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