Adot Continues Interstate 40 Upgrades With Series Of Paving Projects

Current projects between Kingman and Flagstaff could cause delays


Construction work on Interstate 40 between Flagstaff and Kingman will likely cause delays during the busy summer travel season, according to the Arizona Department of Transportation.

The nation's third-longest interstate stretches from California to North Carolina. The daily heavy truck traffic, winter weather and summer monsoon storms take a toll on the roadway and that’s why the Arizona Department of Transportation is investing in several pavement improvement projects along the I-40 corridor in northern Arizona.

Commercial vehicles account for approximately 25 percent of the overall traffic on I-40 — the highest percentage of truck traffic on any Arizona highway. I-40 is in need of preventive maintenance and ADOT has a plan in place to resurface large segments of the highway, including several projects in progress.

Currently, ADOT has 12 pavement improvement projects along Arizona’s portion of the I-40 corridor slated this summer as part of the state's 2015-2019 Five-Year Transportation Facilities Construction Program.

Faced with declining revenues and a backlog of overdue projects, the ADOT board recent decided to drop key projects like the Highway 260 upgrades north of Star Valley near Lion Springs to free up more money to catch up on overdue highway maintenance projects.

Collectively, it’s a $130-million-plus investment to resurface approximately 135 total miles of I-40, or 37.5 percent of the highway, which extends 360 miles across the state and intersects five counties.

“With timely preservation, ADOT can provide the traveling public with improved safety and mobility, and smoother, longer-lasting pavement,” said ADOT Senior Deputy Engineer Dallas Hammit. “I-40 is one of Arizona’s Key Commerce Corridors, linking northern Arizona and the state to continued economic growth and development.”

Motorists traveling along I-40 between Kingman and Flagstaff need to be aware of two paving projects and a rock scaling project that could create delays.

ADOT recently started a $13.6 million project to upgrade a 15-mile segment between Rattlesnake Wash, five miles east of Kingman, and the US 93 junction (mileposts 57-72). The paving project is expected to be completed this fall.

Just east of this project is another resurfacing project that is scheduled for completion this summer from Ash Fork to Williams (mileposts 146-161). The $10.5 million project started last summer but work stopped for a winter shutdown. In the same area, ADOT is also working on bridge rehabilitation projects from Ash Fork to west Ash Fork (mileposts 143-147).

Through early August, westbound I-40, just west of Parks, may have up to 30 minute delays as part of a rolling closure to allow crews to clear the roadway rock scaling operations. The work is part of a $1.6M rockfall containment project which includes rock excavation and scaling, installing rock-fall netting and constructing a wider rock ditch. This westbound closure will be intermittent during rockfall excavation and scaling operations currently underway Monday through Friday from 5 a.m. to 5 p.m.

ADOT advises drivers to proceed through or near work zones with caution, to slow down, and to be alert for construction equipment and personnel.

For the latest information about highway conditions across Arizona, visit ADOT’s Travel Information site at or call 5-1-1. Visit, or for more information about ADOT.


Projects (Location) Mileposts Cost Status (Fiscal Year)

Rattlesnake Wash to US 93 57-72 $13.6 million In progress

US 93 to Silver Springs Road 72-80 $6 million 2016

Willow to Markham Wash 86-108 $18 million 2016

Ash Fork to Williams 146-161 $10.5 million In progress

Garland Prairie to Parks 166-179 $17 million 2016

Parks to Riordan Bridge 179-191 $13 million 2018

Walnut Canyon to Twin Arrows 204-218 $13.1 million 2015

Navajo County Line to Minnetoka 250-259 $12.2 million 2015

Holbrook to Sun Valley Road 290-297 $6.4 million Completed Summer 2014

Sun Valley Road to Washboard Road 297-303 $10 million 2016

Big Lithodendron to Petrified Forest National Park 303-311 $7.1 million Completed Summer 2014

Allentown Road to Arizona/New Mexico state line 354-360 $5.5 million 2017

12 Paving Projects 135 total miles $132.4 million total investment


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