The Arizona Department of Transportation (ADOT) has completed the I-10 Broadway Curve Improvement Project, the largest urban freeway reconstruction effort in state history. The $778 million project expanded 11 miles of I-10 from just south of Ray Road to I-17 near Phoenix Sky Harbor International Airport. It was delivered through a public-private partnership.
Construction, which began in 2021, added new travel and high-occupancy vehicle (HOV) lanes in both directions and introduced collector-distributor (CD) roads to separate entering and exiting traffic from mainline lanes. The project also rebuilt the I-10/SR 143 interchange, widened the Salt River bridge, and constructed multiple new bridges and sound walls.
ADOT partnered with Broadway Curve Constructors—a joint venture of Pulice, FNF Construction, and Flatiron Constructors—to design and build the project under a single contract. Project designers included T.Y. Lin International Group, Stanley Consultants, and Aztec Engineering.
The project was funded through a mix of federal funds, local funds, and revenue from Maricopa County’s Proposition 400, a half-cent sales tax dedicated to regional transportation infrastructure.
More than 300,000 vehicles travel through the Broadway Curve daily—a figure projected to rise by 25 per cent by 2040. The improvements aim to reduce congestion, improve safety, and support regional growth and economic activity.
Final minor construction work, including landscaping and barrier finishing, will continue over the coming weeks, but all lanes are now open to traffic.