Eli5 why runways don’t seem to suffer from potholes like highways do?

Question

How are runways different form highways that they never seem to have potholes? Is it how they’re constructed? Or how they’re maintained?

In: 1

Answer 1

Simple math. Planes have 3 wheels, cars have 4.

(Or each airport only has a handful of runways that they meticulously maintain so planes don’t crash and burn).