What is the name of the federal controlled-access highway system in Germany that is part of the Cologne Beltway?
Cologne Beltway The Cologne Beltway (German:"Kölner Autobahnring") is the collective term for the Autobahns encircling Cologne. It consists of the Bundesautobahn 1, the Bundesautobahn 3 and the Bundesautobahn 4. The beltway handles one of the highest traffic volumes in Germany.
Hamburg Wallring The Wallring (] ) is a semi-circular urban ensemble encircling the inner city of Hamburg. It consists of a four-lane ring road with a total length of 3.3 km and a continuous built-up street front on its inner side. The outer perimeter is — for the largest part — made up by a string of parks.