You'd have to clean everything within 1000 yards of the highway. It is kicked airborne and is blown all over the place. In California the effect is pronounced w

You'd have to clean everything within 1000 yards of the highway. It is kicked airborne and is blown all over the place. In California the effect is pronounced where it doesn't rain. You can wipe road dust off your window exteriors with a cloth and it will be black in one pass. Stucco buildings look dirty and brown before long due to the road dust accumulating in their rough surface.