I still think that Speed Limits are more interpreted as a suggested speed. I really only follow the limit in school zones and on small roads when there's no one riding on my back bumper. If I'm on the highway, I'm going the same speed or slightly faster than traffic, but I make it a point not to switch lanes all the time to get ahead, if the traffic is moving the same speed across all lanes I stay where I am unless there's a drastic speed difference(like someone in the left lane doing 60 while others are doing 75).
I think that many accidents are due to lane changes...they are risky. The thing I hate the most is when you start to move over, then someone else also moves over, and you try to go into the same lane. It's happened to me once, and while I was there first, I had to retreat because they were driving a bigger car(well, given the size of my 323 and all...).
They had an old George Carlin comedy show on HBO last night, the one where he does a section on driving, it's funny as hell. He said that everyone going slower than you is an idiot, and that people going faster than you are maniacs. That's why you can't get anywhere fast, because you're surrounded by maniacs and idiots. The main thing that I fully agree with is when he said that if someone is matching his speed on the highway he has to change his speed. It happens to me all the time. Someone will be going the same speed as me, next to me. It's like they want to make you worry about them. I usually speed up depending on road conditions. My dad sometimes will be passed very fast by someone, and he'll catch them and match thier speed...he's done it up to around 120mph chasing a Cavalier(yea, who thought they could go that fast?)...we cought up with the guy, then were next to him. He tried to go faster still, but my dad downshifted and passed him, going around 125mph...then my mom started yelling that it was too fast lol.
If they changed the age of driving to 18 or higher, it would be a very bad injustice to the rest of the kids who actually drive good(like me). I'd rather have some dumb kids on the road and beable to drive then forfeit driving because of them. As long as they stay away from my car, I couldn't care less if they were on the roads. HOWEVER, I think that it's a very good thing to limit the occupants of the car to 1 other teen, or possibly 0(unless going to school/work), for the first year or so of driving. Most teen wrecks are caused by 2 things; distractions(other teens), and showing off(to other teens). Get rid of the kids riding in the car, and you'll get rid of most of the showing off(though the real drivers will still show off for self-satisfaction

).
I also think that the US should reconfigure street lights so that when the light is red and about to turn green(like say within 15 secs), the yellow comes on with the red to let those first drivers know to be ready to go. I hate getting ready to take off from a light and then you have people that either start rolling forward into the intersection, or they just don't pay attention and sit there through part of the green. It would be great.