[tyg13]

If you live in a jurisdiction where there is a speed limit enforced by law, you likely have driven above it at some point. By definition, this is a violation of the law. Yet you have observed that you have never been arrested (perhaps never even ticketed?) as a result of this. Is this a logical contradiction? Obviously not. The law isn't always enforced, and not every violation of the law is punished.

I can't speak for where you live, but in America, there are many, many traffic laws. They differ greatly by jurisdiction. Most of them are not enforced. Sometimes explicitly -- for example, in my city, they recently announced they would no longer detain people for specific minor traffic violations -- but usually, it's implicit which go unpunished. It's also selective. By creating an unseen web of violations, the detaining officer is given all the necessary tools to make each stop as painful or as peaceful as they'd like.