In this June 18, 2020, photo provided by Arizona Department of Transportation is the ADOT Dust Detection and Warning System on Interstate 10 between Eloy and Picacho Peak, in Tucson, Ariz. The $72 million warning system along 10 miles of I-10 between Phoenix and Tucson includes sensors and overhead electronic message boards that display alerts about blowing dust and tell drivers to slow down. Dust storms are common during the monsoon which started June 15. (Arizona Department of Transportation/Arizona Daily Star via AP)
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