Technically, you can go to jail for going one mile per hour over the speed limit. The cop or cops can call it reckless driving. I have lost my license three times due to speeding. Two of those times I was doing 10-15ish over and received reckless driving tickets. It's all up to how much of dick or nice guy the cop or cops want to be. They can charge you with the worst ticket, which is reckless driving, for anything as minor as not using your turn signal when you turn.