[fotbr]

Two years ago (maybe three?), they closed one of the runways at the local international airport for the better part of a year for repairs (and partial replacement).

That particular runway was poured in the late 50s or early 60s, and last had major work in the 90s. So it happens, just not on the every-two-or-three-years schedule that it does for roads (or yearly, depending on where you are).

The obvious difference, at least around here, is that runways are made of concrete - lots of it, each batch truckload tested as it is poured (slump tests, anyway), while roads are made from asphalt, as little of it as the DoT will allow, and as far as I can tell, zero quality control testing.