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Oh! Oh! Mr. Clod and I were just having a discussion about road paving, and maybe you guys can help.
When they repaved our street a few years back, it wasn't normal blacktop but rather a deep layer of gray gravel--only he and I remember the thickness differently. He says that the smooth surface was underneath, and the loose gravel was just some leftover that they didn't bother to sweep off; I maintain that the gravel WAS the surface, and it packed down to smoothness over the course of about 6 months from all the neighborhood cars going over it, and that this was in fact the intended design of the product. But I can't find proof that such a thing exists. "Unbound surface aggregate" was the closest descriptor I could come up with from Google, but all the results are huge PDFs that I can't make much sense of.
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