The Bundesstraße 2R is a German federal highway (German: Bundesstraße) in Bavaria. It runs as a ring road within the city of Munich in Bavaria, is 28 km (17 mi) long, and is the most traffic-prone road in Germany. It is called the "Middle Ring" (German: Mittlerer Ring) because of its concentric position between the Altstadtring and the incomplete Outer Ring, as well as being within the Autobahnring. From Wikipedia
