Impatient nasty aggressive drivers

The speed limit is just that. The speed range is entirely different. I get cut off 200 times a day, easy. Everybody drives at the speed they are most comfortable with. Everyone is different, therefore everyone drives at different speeds. Get used to it. There are a zillion threads like this on hundreds of car sites, but I have never seen anyone use the laws of physics to explain what they, or anyone else is doing. At 55 miles per hour, how many lane changes do you have to make, (one of the most dangerous moves you can make by the way) assuming you pass a car for every lane change , to arrive ten seconds sooner at where I'm going to be in one hour? By the way, there is a fairly safe way to get on down the interstate, quickly, legally, very safely, with virtually no stress. If you know it good for you. Don't tell. If everybody did it, the laws of physics wouldn't allow it to work. I use it to keep myself safe from the insane, which I think is a prerequisite for obtaining a license.