I was in the back seat of a car doing over 125 on rt 26 heading north out of Hendersonville NC, long ago and late one night.
There is a paved strip NW of Dodge City which is in the middle of nowhere. It goes from a dirt road to paved then back to dirt. I have never seen another vehicle on that two or three mile strip.
I once got my F-250 with a 460, up to 140. The speedometer only went to 85 but the tach was at 6000 and calculating the speed from that, it had to be going over 140.