Yep, that’s the problem with using fines to pay for government. What appends when everyone obeys the law?
Then, they’ll create more laws that are impossible to obey. See Ayn Rand.
“Did you really think we want those laws observed?” said Dr. Ferris. “We want them to be broken. You’d better get it straight that it’s not a bunch of boy scouts you’re up against... We’re after power and we mean it. . . There’s no way to rule innocent men. The only power any government has is the power to crack down on criminals. Well, when there aren’t enough criminals one makes them. One declares so many things to be a crime that it becomes impossible for men to live without breaking laws. Who wants a nation of law-abiding citizens? What’s there in that for anyone? But just pass the kind of laws that can neither be observed nor enforced or objectively interpreted – and you create a nation of law-breakers – and then you cash in on guilt. Now that’s the system, Mr. Reardon, that’s the game, and once you understand it, you’ll be much easier to deal with.”
— in “Atlas Shrugged” (1957)
To answer your question, they make new laws. You have to have your turn signal on 100 feet on small intersections, 300 feet on main arteries. Always something to pick our pockets. Also, you have to stop at a light and make sure your car doesn’t hang over the white line, or you are fined for that.