People used to use it correctly. In Germany "lane discipline" is what allows the Autobahn to be free of speed limits, but have less fatalities than our highway system. They simply don't travel in the left lane to do anything other than pass. There is a simple logic to how a highway works that most people don't understand. It's not about a law, although the law states the left hand lane is for passing only. It's also illegal, and more dangerous, to pass on the right. Those who insist they have a "right" to stay in the left lane defy how a highway works, which makes it less safe. Simply put, the only way to safely pass anyone is on the left. If the left lane is jammed with people who are going too slow to allow anyone to pass someone in the other lanes, then by default one now has a highway full of people going no faster than the person going the speed in the left lane. I've been traveling in the left lane on a busy highway, in a line of cars going just above the speed limit and clearly see way at the front is someone making no effort to move to the right, holding everyone up. This can go on for miles and often ends with that whole line of cars peeling to the right, passing the one slowpoke in the left lane, and then sliding back into the left lane. But that can only happen if there is a space for people to pull into the right lane, with enough room to speed past the the slowpoke, before running into someone else in the right lane. I swear, those of us who use the left lane for passing all the time are actually trying to drive safer, but are often forced to drive in a way that makes it unsafe. For the argument that people make that drivers should not be traveling so fast in the left lane. Perhaps that's true, but you are not the monitor to slow people down. And like my Autobahn example above, your insistence to hold up vehicles in the left lane creates a much more dangerous situation than anyone going above the speed limit in the left lane. Much of what is courtesy on the road is essentially safer. And vice versa.