@maporsche,
You're getting carried away here, maporsche.
First of all, someone might be speeding at 5 mph faster than you. That's not endangerment.
Secondly, these speed limits are arbitrary. Who says that 60 mph is the safest speed? Why are you so willing to be led around by the nose by those in authority?
Where I live, cops give a blind eye if you're up to 10% over the limit, so there you go... it's all arbitrary. It may be the law, but it's a guide. Yes, I don't think you need to go 120 kph in a 90, but 120 kph in a 110 kph is no biggie. On these straight, flat prairie highways, people often go 130 kph (or even higher) and it doesn't feel any more dangerous or speedy than 110 kph. When you're driving 6 hours somewhere, as I did this past weekend, that shaves an hour or more off your time. People were going faster than me, in fact, in both lanes, at times (130 kph to my 120).
Chill out about the danger factor. People have gotten killed by a car going 30 mph for heaven's sake.