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Plan for daytime lane restrictions on I-40 southwest of Kingman starting May 28 through October

Prepare for delays

The Arizona Department of Transportation advises motorists traveling on Interstate 40 southwest of Kingman to expect daytime lane restrictions beginning Tuesday, May 28, through the end of October as crews replace the top pavement surface on a 14-mile segment of the interstate.

  

 

The following restrictions will be in place Mondays through Fridays beginning Tuesday

I-17 101 traffic interchange

A-1 Mountain Road bridge to be replaced in 40 days thanks to innovation

A-1 Mountain Road bridge to be replaced in 40 days thanks to innovation

April 22, 2022

FLAGSTAFF – The Arizona Department of Transportation will demolish and replace the A-1 Mountain Road overpass along I-40 in Flagstaff in 40 days thanks to an innovative bridge construction method.

Crews will use an accelerated bridge construction method known as a geosynthetic reinforced soil-integrated bridge system. That means crews will create bridge abutments by putting in alternating layers of granular fill reinforced with synthetic material.

In order to replace the bridge, A-1 Mountain Road will be closed to all traffic over I-40 starting Monday, May 2.

During the 40-day closure, drivers will need to use the established detour route. Eastbound I-40 drivers wanting to exit A-1 Mountain Road will be detoured to Exit 191 to turn around and travel west to access A-1 Mountain Road. Drivers on A-1 Mountain Road who want to travel eastbound on I-40 will first travel westbound on I-40  and exit Hughes Avenue (Exit 185) to turn around and travel eastbound.

I-40 will also close overnight at the location of the bridge 16 times in each direction between 7 p.m. and 7 a.m. during the 40-day closure so crews can demolish the current bridge and construct the framework for the new bridge. Traffic will use the off- and on-ramps to detour around the closure.

Utilizing this method benefits drivers with a serious savings in construction time, allowing the project to be completed sooner than traditional methods. In addition, a new bridge deck will be constructed using a polyester polymer concrete that can be placed and cured in a matter of days rather than weeks.

The closure is expected to be lifted by Friday, June 10.

ADOT first employed this innovative technique a few years ago when the agency replaced the Meteor City Road bridge over I-40 east of Flagstaff.

The $4.9 million project, located about 5 miles west of the I-17 junction along I-40, is anticipated to be completed by this fall.

For more information on the project, visit azdot.gov/i40-A1-Mountain.

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