How many situations are there where going over 90mph is make or break? Unless you’re Keanu Reeves driving a bus improbably, that seems like a freakishly rare situation compared to the number of crashes caused by people incorrectly thinking they could safely drive that speed – and with so much energy involved, those are usually fatal.

on many highways, it doesn't feel that fast in at least parts of America because the lanes are so wide... specially in a car (I went much faster on motorcycles)

I know, but specifically what is this emergency situation where being able to go 120 is enough but 90 is not? I’ve spent plenty of time on fast freeways and even the ambulance drivers are rarely going that fast because it’s unsafe.

it's pretty rare, so hopefully you should not get a speeding ticket for it because you would go to jail and that emergency would not matter.

Most vehicles on the road can't really be safely operated at 90mph, especially by the layperson, no matter the need.

If you have a turbocharged v4 I a light vehicle it’s pretty dang easy to drive 100+ mph. If you’re paying attention, the road conditions are good, and you’re not aggressively tailgating or passing people, it’s relatively safe.

The problem is it doesn’t take much to become unsafe and physics is not very forgiving of bad judgement.

> The problem is it doesn’t take much to become unsafe and physics is not very forgiving of bad judgement.

This is pretty much it. All it takes is a pothole (you'll barely see it coming at that speed) or something else, like a deer or small animal. And oops, it's over.

Lots of people over-estimate their ability.