The „yellow bird“ as it could be seen over the sky of North Rhine-Westphalia from about 2002. A Cessna 172 as „traffic control“, especially during the vacation season, the weeks when there are the most kilometers of traffic jams on German highways.

Thus, the ADAC (German Automobile Club) together with the WDR (West German Radio & TV Station) flew control flights, especially during the vacation season, in order to be able to radio the biggest traffic jams directly into the studio.