I am from the Denver region and from personal experience I know the area has a lot of Bentonite clays [0] which can expand as water is absorbed and contract as it dries. My neighborhood was built on land with a lot of this clay and our streets are wavy and our driveways are cracked to hell. I imagine they deal with similar issues at DIA.
My neighborhood is the same. The ground and site prep out at DIA the Civil Engineer friend told me about took things like that into account.
I for one have had much of the cement replaced around my house (some more than once) and when I had the driveway redone, explicitly asked them to mitigate against the clay with whatever they had that made sense. I forget what all they had extra in the proposal that I approved (it was 10+ yrs ago) but my new driveway isn't having any issue while some neighbor's new ones are already cracked again.
[0]: https://en.wikipedia.org/wiki/Bentonite