For Americans, 120 kph is ~75mph and 140kph is ~85mph. I think there is a single road in the US with an 85 speed limit, and only some states use 75-80.
I’ve definitely driven 85mph on the I10 in texas. The roads are flat and straight, so it almost makes sense - but you have basically zero margin for error at those speeds. If I recall, the road fatality numbers for texas aren’t exactly good.
