CA really is different in a number of ways. I've spent half my adult life there. CHP pulls trucks and RV's/towing over for any speed over 55. We learned this the hard way.I've encountered many semis in CA on Interstates 5 and 80 running at more than 70mph. California, IMHO, is not that different from the rest of the country.
Although there may be some, I'm not aware of any other states that do this in an otherwise 70mph zone.