There some things that you just have to learn on your own through personal experience. My experience is that all the interstates vary from very nice to simply terrrible. I-80 in PA used to be simply terrible. Last fall I traveled it from west to east and back several times and PA has done some excellent work and by and large, 90% of it is very good these days. You can pay for your travel on Turnpikes and Interstates and pay through the nose for the privilege (be sure to have an EZPASS for your coach) but all of the roads have places that are just terrible. Of all the things that the government spends money on, the one that would benefit us, and everyone else, is infastructure. Our interstates are not in good shape.
Frankly often the US highways are in better shape, but of course take longer and more fuel to travel, but we have found some very nice non-interstate US highways.
And bridge transitions are just as bad in California as they are in Colorado and Massachusetts.
Gary and Dee, Zowie and Bowie (traveling cat sibs)
2019 Cornerstone 45B, X15-605hp, Imperial, Spartan K3,
2013 Honda CR-V toad, Demco Excali-Bar II,
Demco Baseplate, Demco Toad Light system, 73 de W5Fi