Arizona: I-10 Broadway Curve Improvement Project

A New “Broadway Curve” Takes Shape

Challenge: Economic growth and mobility in Phoenix have been thrown a curve ball due to traffic congestion. More than 300,000 vehicles pass through the city’s I-10 Broadway Curve on an average weekday. Traffic through the corridor, which provides access to 4,600 businesses, including 50 of the region’s largest employers, and the Sky Harbor International Airport, spikes during rush hour and is expected to increase 25 percent by 2040.

Solution: With help from the federal infrastructure investment law, the I-10 Broadway Curve Improvement Project will widen the highway to six general purpose lanes and two high-occupancy vehicle (HOV) lanes in each direction between US 60 (Superstition Freeway) and I-17. A fourth general purpose lane will be added in each direction between Ray Road and US 60. The project also includes adding collector-distributor roads, replacing bridges and rebuilding a key interchange. The result – reduced travel times during peak hours and less gridlock. Phoenix commuters, travelers and businesses will get a safer, more efficient freeway, eliminating 2.5 million hours of driving and $130 million annually in time savings.

What they’re saying: “This project will improve safety and efficiency for hundreds of thousands of drivers who travel through the Broadway Curve each weekday and generate $658 million in new economic activity,” said Phoenix Mayor Kate Gallego. “It is delivering on a promise made to voters in Proposition 400 to improve our transportation system and reduce congestion.” (Arizona DOT press release, 11/2/2021)