Of course, drivers here engage in all kinds of selfish, crazy, unsafe behavior all the time and usually nothing comes of it but at least there are laws on the books about staying in your lane or maintaining a safe distance from other cars and you can get cited for doing intentionally reckless things, so people more or less adhere to certain "norms". Sometimes people even get ticketed and the fines can be stiff with points on your license so that keeps some of the idiots in line.
Here we usually have two kinds of drivers. In heavy, stop and go traffic when someone is trying to nose their way into your lane it is not uncommon to let them in with a friendly wave and you'll get a smile and an appreciative wave in return. This can become contagious and so the next time, that person does the same for someone else wanting to squeeze into a lane. And traffic flows along much better as a result with fewer angry feelings. Of course, not everyone is like that. An interesting thing to observe is that the most aggressive, selfish drivers are almost always from out of town, usually from a much more populated urban center in another state.
The other thing we get here in my rural area when you are driving on isolated two lane roads out away from local cities and towns are the crazy drivers who think no one else is going to see what they do. That's why we have dash cams, I guess.
Last week. I had three almost identical incidents all in one day where a driver coming from the opposite direction made an abrupt left hand turn right across my path to the point where I nearly T-boned them even though if they had waited a second or two for me to pass through there was nobody behind me they would be endangering with a turn like that. Three in one day was a record though. The thing is that in each case the drivers clearly knew they were about to do something really reckless.