In dust storms best thing to do is creep off the highway as far as you can get, turn all your lights off (so no one thinks you are on the road) and wait it out.
If you go slow on a highway, you will be rear ended.. If you stop on the highway, you are probaby dooooomed.
Usually they past in a few minutes.
I got caught in a sudden dust storm out here a few years ago. Visibility dropped to nearly nothing, and the junk flying through the air cracked my windshield.
No. This one lasted for many days. Honest. :)
Thanks for the advice....I'll pass it on to Gramps!