Our "Where in AZ??" challenge features a more unusual roadside attraction.

Adopt a Highway volunteers made big splash in 2017, but we could use even more help.

Work zone safety means something extra to us at ADOT.

Completed 60 years ago, Mule Pass Tunnel cost the state $2 million. That's the equivalent of $17.2 million today.

Planning to hit the road this spring or summer? Make sure you do you homework by visiting az511.gov to learn about any projects and restrictions in Arizona's high country.

We're counting down some of the biggest news for Arizona motorists in our Friday Five blog.

We're betting this building is going to stump many of our "Where in AZ??" participants this week.

Beginning this week, you’ll be able to see the life-and-death consequences that selfish driving decisions have on Arizona’s motorists.

ADOT prides itself on "making transportation personal" in many ways. Here's just one.

When it comes to transportation planning, can one voice make a difference? The answer is yes.

We applaud the hard work of our Adopt a Highway volunteers who cleaned up 1,500 miles of state highway last year.

Freeway construction isn't just nuts and bolts. If you know where to look, there are some beautiful things to see. The South Mountain Freeway project is featured in this week's Art of Transportation.

A road on a steep grade is one of the few clues available for participants in this week's "Where in AZ??" challenge.

A project as large as the Loop 202 South Mountain Freeway makes for some impressive pictures. Here's where you can check them out.

Thanks to everyone who entered the ADOT Safety Message Contest, and thanks to those responsible for the 2,500 votes we received.

Other states look to ADOT as they consider adopting wrong-way driver detection technology.

We're time-traveling to a 1978 airshow at the Phoenix Deer Valley Municipal Airport for this week's Throwback Thursday.

We're going gaga over a nosy pooch, remembering one of Hollywood's greats and his visit to the Valley and leading the way in wrong-way detection technology for this week's Friday Five.

Time to put your thinking caps on and identify the location of this week's "Where in AZ??" challenge.

Hundreds of volunteers help keep Arizona's highways clean every year, saving the taxpayers money and keeping Arizona beautiful.