Litter is no joke, neither is the effort necessary to keep our 59 pump stations along Valley freeways clean and maintained. That's where ADOT's hydrovac comes in.

The Deck Park Tunnel has been a planned feature for Interstate 10 through Phoenix since the 1980s. But before that, concepts included something a little more interesting.

The Ligurta Underpass is one of Arizona's best examples of clean design in a World War II-era rural bridge.

It looks like summertime in Arizona in today's "Where in AZ??" photo.

We're proud of our YouTube channel and excited that one video has now reached more than 250,000 views.

We love our longtime Adopt a Highway volunteers and hope others will find inspiration in what motivates them, like this group from the Chinle Navajo Land Department.

The firefighters at Grand Canyon National Park Airport train hard to make sure they are ready for any emergency.

It was 90 years ago that Arizona dedicated Navajo Bridge spanning the Colorado River at Marble Canyon.

Listing who received invitations and even how officials would obtain lumber to build a speaker stand made for page-one news back in 1936.

A holiday is coming up, but we have last "Where in AZ??" before you go on vacation this week!

The big reorganization brought with it many new responsibilities for the department, including the addition of several new divisions.On July 1, 1974, the Arizona Highway Department officially became the Arizona Department of Transportation...

Since 1974, ADOT has combined functions once handled by the Arizona Highway Department, the motor vehicle services agency and the Arizona Aeronautics Department.

In 1974, the Arizona Highway Department and the Arizona Aeronautics Department merged to become ADOT. Today our Aeronautics Group continues to serve airports statewide.

If lightning never strikes the same place twice, we're glad an ADOT weather camera was able to catch this one-in-a-million shot of a strike near Holbrook.

Join the herd and take our "Where in AZ??" challenge!

Building on efforts across the decades, we’re working on a dust detection and warning system on I-10 near the community of Picacho.

Today's Art of Transportation photo is a meta-level look at our project on I-17 and Pinnacle Peak.

Those signs saying don't park in tall brush or don't drag chains? There's a serious reason for them.

Today we're reliving a 1983 milestone for the Superstition Freeway in Mesa.

There's a lot of logistics and planning that goes into large products, like the concrete deck pour for the expansion project of I-10 in Casa Grande.