We generally cross from Port Huron, Michigan to Buffalo, New York at least every other summer. I've always found it interesting that, while the Canadian roads are lined with signs warning of heavy fines for speeding, and the posted limits are lower than U.S. freeways, the traffic is just about as fast as on our side. On the other hand, I don't recall seeing as many Canadian drivers jump lanes 6 times a minute to gain one car length at a time. In July we drove more 2 lane secondary highways in Canada then I have in almost 40 years. What I noticed was this: In the U.S., if you are in a no-passing zone, approaching a hill or curve, at just over the speed limit, there is a still a chance that someone will pass you. But on this trip in Canada, if we were "only" 25 or 30 kmph over the posted limit, it was almost a certainty that someone would pass.
What gives? What's behind the difference in mind set?