Several large Arizona Department of Transportation projects are set to get underway along Phoenix-area freeways in 2026, including the first projects funded under Proposition 479 approved by Maricopa County voters in 2024.
Substantial progress also will be made during the new year on two Proposition 400-funded widening projects along Loop 101 and Loop 202. Voters approved Proposition 400 in 2004. Here is ADOT’s overview of Valley freeway project heading into 2026:
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- Loop 303 Improvement Project between I-17 and 51st Avenue: This $129 million project scheduled to start by late January will add direct freeway-to-freeway ramps at the I-17/Loop 303 interchange in north Phoenix. Crews also will widen Loop 303 to three lanes in each direction from…