Dust, Part II

In this image you can get an idea of the fine texture of the dust. It must be 2-3 inches thick in most places on the road. When large vehicles go over the road, even at moderate speeds, clouds of dust go up into the air and the winds can carry them for long distances. A high quality gravel would resolve this situation but that material isn't easy to come by and road overhauls consist of graders scrapping the surface smooth, as opposed to building up a roadbed.