Traffic on Interstate 17 south of Flagstaff will shift to one side of the highway starting Thursday, Aug. 7, for the Arizona Department of Transportation’s construction of a wildlife overpass.

I-17 will be narrowed to one lane in each direction near Willard Springs Road, which is about 12 miles south of Flagstaff. Crews will finish barrier-wall placement and other work Thursday to switch both directions of traffic to southbound I-17 for at least two weeks, according to an ADOT release.

The shift will allow crews to install steel girders and accomplish other work above northbound I-17 while avoiding the need for highway closures during construction of the wildlife overpass, transportation officials said.

Another future traffic shift will be used to allow the same work to take place above

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