Yeah, and if you want to be even more technical, most states only allow you to go 10 to 15 mph over the speed limit when passing, and then expect you to return to the middle lane and resume driving the speed limit when done. Some don’t even allow that exception, which means you can (presumably) only use the left lane if the car in front of you is driving slower than the speed limit. No one uses the lanes this way, least of all the people who justify tailgating because, “the left lane is for passing.” If the left lane is going significantly faster than middle lane, as you said, “fucking relax.”