It is also where the "Kraftfahrt-Bundesamt" is located and keeps track of driving offences. We have a system where for some driving offences (speeding, running over a red light, using a mobile phone while driving) you, in addition to a fine, get penalty points. Accumulating a certain amount of points within a 2 year period may cost you your driver's license. In German this is referred to as "Punkte in Flensburg" (lit. points in Flensburg).