Unfortunately, the reality is that there are two sets of conflicting rules we are expected to obey while driving. The first is the written law, and the second is social norms. You can choose whichever you want to obey, that's your choice. There are penalties for breaking both sets of rules, and you have to decide which penalties are acceptable to you. On one hand, you might get a ticket for speeding (unlikely these days, it seems) or you might get somebody tailgating you for driving 15 miles an hour slower than everybody else is driving and intentionally drifting towards you while passing. It would be nice if our laws, supposedly created by the will of the people, reflected how fast we all want to drive, but for whatever reason they don't, and here we are.