Perhaps, if speeding in this case was measured on a continuum. If you look at it as a binary choice, either someone is speeding or not, you can conclude that people going over the speed limit are indeed still speeding.
I know that areas in my town that are well known for speed traps definitely have a lower occurrence of people speeding. On a neighborhood road near my house we had a really bad problem with speeders. Over the course of several months, there were numerous speed traps. Today, there are less speeders than before.