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A digital message board on the highway encourages motorists to designate a driver.
03/14/2026

Don’t leave it up to luck: Designate a driver this St. Patrick’s Day

With St. Patrick’s Day around the corner, we want to take a moment and remind everyone to plan ahead so you get home safely after the festivities. If you’re out on state highways this weekend, you may notice some of our overhead message...
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Quarterly volunteer adoptions background
03/07/2026

Meet the volunteers beautifying Arizona roadsides

These are just a few examples of the efforts made by our growing team of volunteers. See who's volunteering in your community and the accomplishments already being made to reduce litter.
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Website poster for ways to tour Route 66
03/06/2026

Route 66 centennial: Ways you can join a year of celebration

While Route 66 was officially decommissioned in the 1980s and replaced in Arizona by I-40, its centennial is a big deal for those of us in the highway business. In this post, we're pointing you to some of the ways Arizona cities and towns are celebrating:
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03/20/2014

The Science of Transportation: Sieve Analysis

You might think that highway construction is all about big machinery, heavy-duty vehicles, massive structures and materials by the ton – but it’s not.
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03/13/2014

Look at the progress: Loop 303/I-10 traffic interchange

Check out the progress on the Loop 303/I-10 traffic interchange project.
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03/12/2014

Much effort needed to move I-11 from concept to reality

ADOT Director John Halikowski discusses I-11, along with the effort and cooperation needed to move forward.
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03/11/2014

Tentative Five-Year Construction Program ready for public comment

ADOT is asking for your thoughts regarding the 2015-2019 tentative five-year program.
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03/07/2014

A new milestone for Loop 303 project

West Valley drivers are going to notice a change at Loop 303/McDowell Road and Loop 303/Thomas Road come Sunday morning.
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Poster promoting public input for Arizonas Tucson-Phoenix rail study, with train images and comment deadline.
03/06/2014

Get your opinion heard, public comment period begins this week for ADOT's passenger rail study

As ADOT continues to study the feasibility of a passenger rail line between Phoenix and Tucson, the agency is looking to the public to provide input on the three alternatives that have been selected for further study.
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Black-and-white map showing Arizona’s state highway system, including Route 66 and Route 89, labeled by county.
03/05/2014

Numbering Arizona's highways

"Arizona's Transportation History" provides us with a look at how and why our state's highways were numbered.
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02/28/2014

I-17 climbing lane project moves to next phase

One of the most visible projects on Interstate 17 is moving onto the final phase of construction.
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Cars driving on a highway next to an overpass under construction, with a stadium in the background.
02/27/2014

Progress can be seen on Loop 101 ramps in Glendale

The future Loop 101 HOV-lane ramps at the Maryland Avenue Bridge have truly taken shape near the Westgate City Center, Jobing.com Arena and University of Phoenix Stadium.
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National Transportation Week Display from 1980
02/26/2014

From the ADOT Archives: Communicating with the Public

Back in May of 1980, ADOT marked National Transportation Week with this outstanding exhibit that was displayed inside Phoenix's Central Library.
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