Drivers on most-traveled roads in Arizona to get new, improved freeways

PHOENIX – Drivers will temporarily encounter construction delays but ultimately end with longer, wider freeways and other improvements to some of the most traveled roads in Arizona under a five-year plan from the Arizona Department of Transportation.

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Building the South Mountain Freeway in the southeast Valley and improving roads near Tucson, Scottsdale, Wickenburg, northern Arizona and along the Mexico border are part of a $4.5 billion construction plan. Some projects will start as soon as this year.

The high-priority projects will ease traffic woes, add jobs and spur other economic development, said Laura Douglas, ADOT spokeswoman.

Other key road projects include:

  • Completing two I-10 projects that will complete a goal of widening the entire stretch of I-10 from Casa Grande to Tucson to a six-lane divided highway.
  • Improving State Route 189 in Nogales to help commerce between Interstate 19 and the port of entry.
  • Adding a railroad overpass on State Route 347 in Maricopa.


Here’s a look at upcoming ADOT projects in Maricopa, Pima counties and elsewhere in Arizona. Zoom in to find construction near you: