PHOENIX – The State Transportation Board has approved a five-year construction program that calls for pavement and safety improvements throughout Arizona and a billion-dollar project to widen Interstate 10 between Phoenix and Casa Grande.

The board recently voted to adopt the 2024-28 Five-Year Transportation Facilities Construction Program.

The plan includes more than $9 billion in transportation investments, commits $2.6 billion to upgrade pavement conditions and to work on bridge preservation projects across Arizona, Arizona Department of Transportation officials said.

Some of the projects are:

• Widening Interstate 10 between Phoenix and Casa Grande, which current estimates put at more than $1 billion. ADOT has a goal of widening I-10 to three lanes in each direction between Phoenix and Tucson. The first stage of construction on the corridor is the Gila River Bridge project scheduled to start later this year.
• Constructing the Interstate 40/US 93 West Kingman interchange. The program includes a total of $160 million for construction in 2024.
• Widening and improving US 93 between Wickenburg and I-40 in Kingman, including expanding three segments of the highway from two to four lanes.

Other program highlights include $469 million for projects that improve highway safety, efficiency and functionality, such as smart technology or adding shoulders, according to ADOT.