Construction

When time permits here at the ADOT Communications factory, I like to dive into the State Library, Archives and Public Records Arizona Memory Project and look at old photos of highway projects, equipment, people, etc.

We mention it a lot, but what is pavement preservation? We break down the work and considerations that goes into maintaining Arizona's highways and freeways.

We want your help planning highway projects. The deadline to comment on our tentative Five-Year Plan ends tomorrow!

Did you know ADOT invested half a billion dollars in pavement preservation over the last five years? And we don't plan on slowing down anytime soon.

For this 11-year-old interested in engineering and architecture, there was nothing better than going to the office with Dad.

Let us just take a moment to say how much we love I-40. How much, you might ask? Oh, we love it to the tune of $275 million.

History will most likely remember the late Justin Herman, Arizona Highway Department director from 1956-1973, as the energetic leader who shepherded in the modern state freeway system, including the Black Canyon (I-17), Superstition (US 60) and Maricopa (I-10) freeways.

PHOENIX – With warmer weather coming to Arizona’s high country, the Arizona Department of Transportation is ramping up construction projects to improve safety and extend the life of the infrastructure.

In the Flagstaff area, ADOT has already started projects to replace the Interstate 40 bridges over Business 40 which connects to Historic Route 66 in west Flagstaff. The project, which is approximately 3 miles west of the junction with Interstate 17, will replace the east- and westbound bridges on I-40 in their entirety. The project is anticipated to be completed by fall of 2022.

Does merging present a dilemma for you? Then let us introduce the zipper merge to help!

Everything you've ever wanted to know about box culverts, but were too afraid to ask!

A new interchange is coming to the Loop 202 Santan Freeway and Gilbert just kicked off the construction in style while still being safe.

Does the new interchange at SR 189 and I-19 give you butterflies too? Learn why and how monarch butterflies are being incorporated into the design.

The project to bring southern Arizona its first diverging diamond is moving fast, both to complete the work and to minimalize impact for drivers.

What can you gleam from this photo of roadwork from the 1930s?