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Loop 303 project
08/07/2026

Big freeway construction project is in its early stages south of I-10 in Goodyear

The opening of a well-known travel center featuring a beaver mascot in Goodyear made a lot more news this summer than the start of ADOT’s latest freeway construction project, also in that West Valley city. The project to extend Loop 303...
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Close-up view of textured grooves on a concrete road surface, with blurred vehicles and highway scenery in the background under a partly cloudy sky.
08/05/2026

What is diamond grinding?

You may have heard that diamond grinding is currently being used on the SR 51, I-10 to Shea Blvd pavement project and the pavement improvement projects on the Loop 101 Agua Fria and Pima freeways. But what does that actually mean? Diamond...
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AAH volunteer group
08/05/2026

Route 66 Centennial cleanup

Join us for a special cleanup along a stretch of Arizona’s legendary Route 66 also known as the Mother Road, Main Street of America and the Will Rogers Highway.
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Northern Arizona roadwork
05/20/2019

With summer here, projects in northern Arizona ramp up

As summer starts again, its now warm enough for work on several road improvement projects in northern Arizona.
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05/17/2019

Infrastructure Week: It requires attention, care and support to help grow our future

ADOT Director John Halikowski explains why everyone needs to realize the importance of infrastructure and protect its value by making investments for the future.
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05/15/2019

From the Director: Voting open for ADOT Safety Message Contest

The entries are reminders that the best way to make roads safer is changing our own driving habits and encouraging those around us to change theirs.
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A white semi-truck drives under a concrete overpass under construction, with cranes and unfinished sections visible; blue sky with scattered clouds above.
05/15/2019

Infrastructure Week: Keeping traffic flowing is a straddle bent's job

When a pier needed to support a ramp would otherwise need to be in the middle of travel lanes below, ADOT engineers call on this support structure that straddles traffic.
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Construction workers and machinery lay concrete barriers on a multi-lane highway with traffic signs and equipment visible along the road.
05/14/2019

Infrastructure Week: Consider the Jersey barrier

Here's a look at the simple engineering behind the ubiquitous work zone concrete barrier.
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05/13/2019

40th Street improvements begin immediately for South Mountain Freeway

South Mountain Freeway crews are wasting no time moving onto the final phase of construction for the 40th Street traffic interchange in Ahwatukee.
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Queen Creek Tunnel
05/13/2019

Infrastructure Week: Let us count the ways

What does infrastructure mean when it comes to Arizona's highway system? Here are some numbers.
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State Route 67 with snow off to the sides
05/10/2019

Highway History: State Route 67

State Route 67, also known as the Jacob Lake to Grand Canyon Highway, is one of Arizona's most scenic summer drives.
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Black Canyon Highway ribbon cutting
05/09/2019

Throwback Thursday: How I-17 came to be

Interstate 17, the Black Canyon Highway, was dedicated 55 years ago. Here's the story behind this important north-south link.
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Loaded timber truck is moving across a highway
05/08/2019

ADOT, partners helping reduce risk of catastrophic wildfires

Five years ago, ADOT helped launch the Health Forest Initiative to help prevent large wildfires and protect infrastructure. Now we're expanding that effort.
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