Depends on the car you or .. i am driving.
Some cars I've driven, have gone up to 130 - 150 kmh, very stable
dont feel the speed at all...
Others are shaking like earthquake after 60 kmh.
Most of the time, I drive between 70 - 90... relaxing drive in the
2nd lane, not happy just overtake me... I can listen to music, sing
song, plan my work, think about what to do after work... relax
relax...