Pogo Stick Ride or Saddle Up Your Bucking Bronco

It's called curled joints and happens with concrete highways built with poor moisture control during the curing period. Was less common in the 60's era construction because the Portland cement granules were coarser and they had to use more of it to get their 14 day strength. Modern mixes get strength faster, but respond poorly to drying out during the curing process.

It will be bad until they either do grinding at the high points to smooth things out or overlay the whole thing with asphalt.