We have the same thing on our neighborhood asphalt roads. It's a noisy day every few years when they do it. One truck idles up the road with a big air compres

We have the same thing on our neighborhood asphalt roads. It's a noisy day every few years when they do it. One truck idles up the road with a big air compressor and a guy walking along behind it with an air nozzle on a stick, blasting anything loose out of the crack. It's pretty loud, predictably. Then a little ways behind him comes another guy with a tank of tar filling the cracks. Every few years on an alternating schedule they put a liquid asphalt coating over the top of the whole thing. It's not the most beautiful thing, but it's smooth. I'm 97.92% sure they don't actually do this because it's better. It's cheaper than resurfacing -- then they drive along with a big machine that grinds off the top few inches of asphalt, crushes it up, adds tar, and puts it back down to be rolled.