Another terrible, fatal accident on the 10, between Phoenix and Tucson involving a motorhome and many others; please be careful! /www.theepochtimes.com/n3/334761-i-10-crashes-3-dead-12-injured-afte...
I've lived in AZ for 45 years and haven't had to drive in a dust storm. They were MUCH denser in the 70's than they are today.
By far the worst driving conditions I've ever experienced anywhere in the country has been around Flagstaff in the winter. Dense fog with heavy snow on I-17 25-30 miles south of Flagstaff or between Flagstaff and Winslow on I-40.