They are expansion joints, necessary but the problem is the steel that joins the sections. Blacktop does not help, it compacts differentially so the bumps just come through.
I’m not talking about the joint bumps though. I’m talking about the whole state.
I lived on Highway 66 when it was a two lane road without any shoulders, I know about Oklahoma Highways some years ago, but I left there 35 years ago, so I am a little behind on current conditions. Expansion joints are not common in nearby states, but hey whatever.
We used to drive over into Missouri to race our cars, top speed, no bumps.