I converted this to B & W for now and will look back at the color one later.
These clouds were a lot of fun over the hot desert. I did shoot this with with my iphone. Yes, I was driving while I did this. (I don't recommend this). You can see the shadow of the steering wheel in this shot on the windshield. I got lucky to get the "sightseeing" sign just barely in the shot on the right.
Two lanes here going the same direction - nobody in sight.