Well, a common mistake
I make is really not knowing how fast I've gone, because I just get in the habit of driving
'at a comfortable speed
' too often. I say too often because a comfortable speed is fifty-five in most places for me. Unfortunately, there're a few nifty speed traps
around where I live.
I've got three speeding tickets and I'm eighteen years old. I need to lay off the car driving for a while. In the meantime, here's my advice to myself and others like me.
Good luck, and have fun out on those roads!