Work began recently on the Arizona Department of Transportation's (ADOT) project to add travel lanes and other improvements along Loop 303 between Interstate 17 and 51st Avenue in north Phoenix.

Pulice – A FlatironDragados Co. is the project contractor.

The $129 million project includes construction of direct freeway-to-freeway ramps connecting I-17 and Loop 303.

Project elements include:

• building direct connecting ramps at the I-17/Loop 303 system interchange;

• adding a third general-purpose lane on Loop 303 in each direction between Lake Pleasant Parkway and I-17;

• constructing new bridges to accommodate a future traffic interchange at 67th Avenue;

• widening northbound I-17 exit ramp at Sonoran Desert Drive;

• installing new lighting;

• constructing drainage improvements; and

• installing new overhead signs.

It is the first Phoenix-area freeway project to be funded under the Maricopa Association of Governments' (MAG) Proposition 479 regional transportation plan approved by county voters in 2024. Funding sources include a half-cent sales tax for regional transportation projects.

ADOT is partnering on the Loop 303 improvement project with MAG, which manages the regional transportation plan, including the funding and scheduling of Valley freeway projects.

Construction is expected to take about two-and-a-half years to complete.

For more information, visit azdot.gov/L303LakePleasantI-17.