There is one place in the USA where the unsantioned but dominate conventions of hiway driving are reversed. This is the 33 mile I5 corridor in Washington State between Tacoma and Seattle. I observed this when I first moved there in the mid-seventies, and has continued right up today. By reversed, I mean that the slow lanes are the ones to the Left, and the fast lanes are those on the Right. Of course, this is not how it is supposed to work. There is something about that corridor that needs to be studied.
I have a theory.
All the places along this, that have areas for police to park and use radar, are on the center strips of land between the N/S hiway lanes. They never use the left hand side for speed enforcement. Drivers in the right hand lanes know this, so they tend to follow the posted limits, plus 5 over, as everyone else does in the US.
You end up with a whole stream of evenly spaced cars all going exactly 5 over.
This blocks any radar readings for the left lanes. These left lanes tend to be less stacked up, as the only reason you would be there is if you were taking the next exit. It is in these lanes that people will excessively speed in, but not to take the exit, but to pass lots of people and then quickly lane merge back in to the more right lanes. Then do it all over again after the road re-expands to four lanes to provide for more upcoming exits.
If you do visit the PNW in this area, just notice how many times other cars are changing lanes, and changing them for no apparent reason.
I think its a game to some drivers that they can WIN on their I5 commute, though I can't see the win, cause I'm the guy in the left lanes doing a steady 5 over, like everyone else and have not changed any lanes, yet I see them changing 20 to 30 times their lane and they are still, no more or less, ahead or in back of me as they do have to slow down for the folks that are taking the exit.
I think the game is really, just that momentarily, they get to drive much faster, and feel the thrill of being a race car driver.