I'm talking interstates, not regular old roads. Last time I crossed the country by car (about a year ago) the average speed-limit was very low, absolutely not

I'm talking interstates, not regular old roads. Last time I crossed the country by car (about a year ago) the average speed-limit was very low, absolutely not set at the safe driving speed. I forget what it was exactly, might have been more of an average at 65, but it was dramatically low. Interestingly, iirc the exception to this was North Dakota. As I recall there were plenty of 70-80mph segments there (still low, but with the 5mph tolerance it was reasonable).